Fluid Mechanics and ThermodynamicsWeekly Assessed Tutorial Sheets,

Student Sheets: WATS 7.

The WATS approach to assessment was developed as part of an LTSN Engineering Mini-Project, funded at the University of Hertfordshire which aimed to develop a set of 'student unique' tutorial sheets to actively encourage and improve student participation within a first year first ‘fluid mechanics and thermodynamics’ module. Please see the accompanying Mini-Project Report “Improving student success and retention through greater participation and tackling student-unique tutorial sheets” for more information.

The WATS cover core Fluid Mechanics and Thermodynamics topics at first year undergraduate level. 11 tutorial sheets and their worked solutions are provided here for you to utilise in your teaching. The variables within each question can be altered so that each student answers the same question but will need to produce a unique solution.

FURTHER INFORMATION

Please see http://tinyurl.com/2wf2lfh to access the WATS Random Factor Generating Wizard.

There are also explanatory videos on how to use the Wizard and how to implement WATS available at http://www.youtube.com/user/MBRBLU#p/u/7/0wgC4wy1cV0 and http://www.youtube.com/user/MBRBLU#p/u/6/MGpueiPHpqk.

For more information on WATS, its use and impact on students please contact Mark Russell, School of Aerospace, Automotive and Design Engineering at University of Hertfordshire.

© University of Hertfordshire 2009 This work is licensed under a Creative Commons Attribution 2.0 License.

Fluid Mechanics and Thermodynamics.Weekly Assessed Tutorial Sheet 7.

Student Number 1

Name

Hand out date Hand in date

Q1. A quantity of a fluid, of mass 0.43 kg, is contained in a vertical heat insulated cylinder, sealed at the top by a frictionless piston. The piston has a diameter of 0.50 m and its weight produces a pressure of 0.60 MN/m2 in the fluid. The fluid is stirred by a paddle for 18 minutes and during this time the period the paddle absorbs 0.950 kW of power and the piston rises a distance of 0.16 m. Calculate

i) The change in internal energy of the fluid during the process (kJ). [1 dp] (3 mark).ii) The change in the specific internal energy during the process (kJ/kg) [1 dp] (1 mark).

Q2. A compression ignition engine has as single cylinder with a bore of 22.10cm and a stroke of 37.20cm. The compression ratio is 13 to 1. At the start of the expansion stroke the gases in the clearance volume have a pressure of 4.80 Bars and it is assumed that the expansion is a reversible polytropic process to the law PV1.19 = C. Calculate

i) The pressure at the end of the stroke (Pa). [1 dp] (2 mark).ii) The work done (kJ). [4 dp] (1 mark).

Q3. Provide a multiple-choice type question that could be used to help revision. The question can be from any of the material covered in this subject. Naturally you should present the question and the possible responses together with the correct answer. Whilst there are many possible question types I am only asking for a multiple-choice type question that has one correct answer. You should also write the question such that you seek to get the correct answer from 5 possible alternatives. i.e. Yes/No True false questions are not allowed. Note it is my intention to use these as part of the revision process. (3 marks)

WATS 7. Student number1

Fluid Mechanics and Thermodynamics.Weekly Assessed Tutorial Sheet 7.

Student Number 2

Name

Hand out date Hand in date

Q1. A quantity of a fluid, of mass 0.24 kg, is contained in a vertical heat insulated cylinder, sealed at the top by a frictionless piston. The piston has a diameter of 0.24 m and its weight produces a pressure of 0.60 MN/m2 in the fluid. The fluid is stirred by a paddle for 31 minutes and during this time the period the paddle absorbs 0.410 kW of power and the piston rises a distance of 0.31 m. Calculate

i) The change in internal energy of the fluid during the process (kJ). [1 dp] (3 mark).ii) The change in the specific internal energy during the process (kJ/kg) [1 dp] (1 mark).

Q2. A compression ignition engine has as single cylinder with a bore of 24.90cm and a stroke of 47.00cm. The compression ratio is 9 to 1. At the start of the expansion stroke the gases in the clearance volume have a pressure of 7.50 Bars and it is assumed that the expansion is a reversible polytropic process to the law PV1.33 = C. Calculate

i) The pressure at the end of the stroke (Pa). [1 dp] (2 mark).ii) The work done (kJ). [4 dp] (1 mark).

Q3. Provide a multiple-choice type question that could be used to help revision. The question can be from any of the material covered in this subject. Naturally you should present the question and the possible responses together with the correct answer. Whilst there are many possible question types I am only asking for a multiple-choice type question that has one correct answer. You should also write the question such that you seek to get the correct answer from 5 possible alternatives. i.e. Yes/No True false questions are not allowed. Note it is my intention to use these as part of the revision process. (3 marks)

WATS 7. Student number2

Fluid Mechanics and Thermodynamics.Weekly Assessed Tutorial Sheet 7.

Student Number 3

Name

Hand out date Hand in date

Q1. A quantity of a fluid, of mass 0.62 kg, is contained in a vertical heat insulated cylinder, sealed at the top by a frictionless piston. The piston has a diameter of 0.16 m and its weight produces a pressure of 0.90 MN/m2 in the fluid. The fluid is stirred by a paddle for 14 minutes and during this time the period the paddle absorbs 1.240 kW of power and the piston rises a distance of 0.27 m. Calculate

i) The change in internal energy of the fluid during the process (kJ). [1 dp] (3 mark).ii) The change in the specific internal energy during the process (kJ/kg) [1 dp] (1 mark).

Q2. A compression ignition engine has as single cylinder with a bore of 15.00cm and a stroke of 47.00cm. The compression ratio is 11 to 1. At the start of the expansion stroke the gases in the clearance volume have a pressure of 8.80 Bars and it is assumed that the expansion is a reversible polytropic process to the law PV1.04 = C. Calculate

i) The pressure at the end of the stroke (Pa). [1 dp] (2 mark).ii) The work done (kJ). [4 dp] (1 mark).

Q3. Provide a multiple-choice type question that could be used to help revision. The question can be from any of the material covered in this subject. Naturally you should present the question and the possible responses together with the correct answer. Whilst there are many possible question types I am only asking for a multiple-choice type question that has one correct answer. You should also write the question such that you seek to get the correct answer from 5 possible alternatives. i.e. Yes/No True false questions are not allowed. Note it is my intention to use these as part of the revision process. (3 marks)

WATS 7. Student number3

Fluid Mechanics and Thermodynamics.Weekly Assessed Tutorial Sheet 7.

Student Number 4

Name

Hand out date Hand in date

Q1. A quantity of a fluid, of mass 0.61 kg, is contained in a vertical heat insulated cylinder, sealed at the top by a frictionless piston. The piston has a diameter of 1.04 m and its weight produces a pressure of 0.50 MN/m2 in the fluid. The fluid is stirred by a paddle for 52 minutes and during this time the period the paddle absorbs 1.980 kW of power and the piston rises a distance of 0.31 m. Calculate

i) The change in internal energy of the fluid during the process (kJ). [1 dp] (3 mark).ii) The change in the specific internal energy during the process (kJ/kg) [1 dp] (1 mark).

Q2. A compression ignition engine has as single cylinder with a bore of 20.70cm and a stroke of 40.30cm. The compression ratio is 10 to 1. At the start of the expansion stroke the gases in the clearance volume have a pressure of 2.20 Bars and it is assumed that the expansion is a reversible polytropic process to the law PV1.11 = C. Calculate

i) The pressure at the end of the stroke (Pa). [1 dp] (2 mark).ii) The work done (kJ). [4 dp] (1 mark).

Q3. Provide a multiple-choice type question that could be used to help revision. The question can be from any of the material covered in this subject. Naturally you should present the question and the possible responses together with the correct answer. Whilst there are many possible question types I am only asking for a multiple-choice type question that has one correct answer. You should also write the question such that you seek to get the correct answer from 5 possible alternatives. i.e. Yes/No True false questions are not allowed. Note it is my intention to use these as part of the revision process. (3 marks)

WATS 7. Student number4

Fluid Mechanics and Thermodynamics.Weekly Assessed Tutorial Sheet 7.

Student Number 5

Name

Hand out date Hand in date

Q1. A quantity of a fluid, of mass 0.57 kg, is contained in a vertical heat insulated cylinder, sealed at the top by a frictionless piston. The piston has a diameter of 0.28 m and its weight produces a pressure of 0.90 MN/m2 in the fluid. The fluid is stirred by a paddle for 11 minutes and during this time the period the paddle absorbs 1.790 kW of power and the piston rises a distance of 0.42 m. Calculate

i) The change in internal energy of the fluid during the process (kJ). [1 dp] (3 mark).ii) The change in the specific internal energy during the process (kJ/kg) [1 dp] (1 mark).

Q2. A compression ignition engine has as single cylinder with a bore of 20.20cm and a stroke of 36.10cm. The compression ratio is 18 to 1. At the start of the expansion stroke the gases in the clearance volume have a pressure of 5.30 Bars and it is assumed that the expansion is a reversible polytropic process to the law PV1.31 = C. Calculate

i) The pressure at the end of the stroke (Pa). [1 dp] (2 mark).ii) The work done (kJ). [4 dp] (1 mark).

Q3. Provide a multiple-choice type question that could be used to help revision. The question can be from any of the material covered in this subject. Naturally you should present the question and the possible responses together with the correct answer. Whilst there are many possible question types I am only asking for a multiple-choice type question that has one correct answer. You should also write the question such that you seek to get the correct answer from 5 possible alternatives. i.e. Yes/No True false questions are not allowed. Note it is my intention to use these as part of the revision process. (3 marks)

WATS 7. Student number5

Fluid Mechanics and Thermodynamics.Weekly Assessed Tutorial Sheet 7.

Student Number 6

Name

Hand out date Hand in date

Q1. A quantity of a fluid, of mass 0.34 kg, is contained in a vertical heat insulated cylinder, sealed at the top by a frictionless piston. The piston has a diameter of 0.71 m and its weight produces a pressure of 1.40 MN/m2 in the fluid. The fluid is stirred by a paddle for 58 minutes and during this time the period the paddle absorbs 1.900 kW of power and the piston rises a distance of 0.31 m. Calculate

i) The change in internal energy of the fluid during the process (kJ). [1 dp] (3 mark).ii) The change in the specific internal energy during the process (kJ/kg) [1 dp] (1 mark).

Q2. A compression ignition engine has as single cylinder with a bore of 21.30cm and a stroke of 36.90cm. The compression ratio is 14 to 1. At the start of the expansion stroke the gases in the clearance volume have a pressure of 5.00 Bars and it is assumed that the expansion is a reversible polytropic process to the law PV1.32 = C. Calculate

i) The pressure at the end of the stroke (Pa). [1 dp] (2 mark).ii) The work done (kJ). [4 dp] (1 mark).

Q3. Provide a multiple-choice type question that could be used to help revision. The question can be from any of the material covered in this subject. Naturally you should present the question and the possible responses together with the correct answer. Whilst there are many possible question types I am only asking for a multiple-choice type question that has one correct answer. You should also write the question such that you seek to get the correct answer from 5 possible alternatives. i.e. Yes/No True false questions are not allowed. Note it is my intention to use these as part of the revision process. (3 marks)

WATS 7. Student number6

Fluid Mechanics and Thermodynamics.Weekly Assessed Tutorial Sheet 7.

Student Number 7

Name

Hand out date Hand in date

Q1. A quantity of a fluid, of mass 0.63 kg, is contained in a vertical heat insulated cylinder, sealed at the top by a frictionless piston. The piston has a diameter of 0.64 m and its weight produces a pressure of 1.20 MN/m2 in the fluid. The fluid is stirred by a paddle for 29 minutes and during this time the period the paddle absorbs 1.700 kW of power and the piston rises a distance of 0.10 m. Calculate

i) The change in internal energy of the fluid during the process (kJ). [1 dp] (3 mark).ii) The change in the specific internal energy during the process (kJ/kg) [1 dp] (1 mark).

Q2. A compression ignition engine has as single cylinder with a bore of 16.20cm and a stroke of 20.70cm. The compression ratio is 9 to 1. At the start of the expansion stroke the gases in the clearance volume have a pressure of 2.40 Bars and it is assumed that the expansion is a reversible polytropic process to the law PV1.12 = C. Calculate

i) The pressure at the end of the stroke (Pa). [1 dp] (2 mark).ii) The work done (kJ). [4 dp] (1 mark).

Q3. Provide a multiple-choice type question that could be used to help revision. The question can be from any of the material covered in this subject. Naturally you should present the question and the possible responses together with the correct answer. Whilst there are many possible question types I am only asking for a multiple-choice type question that has one correct answer. You should also write the question such that you seek to get the correct answer from 5 possible alternatives. i.e. Yes/No True false questions are not allowed. Note it is my intention to use these as part of the revision process. (3 marks)

WATS 7. Student number7

Fluid Mechanics and Thermodynamics.Weekly Assessed Tutorial Sheet 7.

Student Number 8

Name

Hand out date Hand in date

Q1. A quantity of a fluid, of mass 0.77 kg, is contained in a vertical heat insulated cylinder, sealed at the top by a frictionless piston. The piston has a diameter of 1.13 m and its weight produces a pressure of 0.70 MN/m2 in the fluid. The fluid is stirred by a paddle for 55 minutes and during this time the period the paddle absorbs 0.960 kW of power and the piston rises a distance of 0.29 m. Calculate

i) The change in internal energy of the fluid during the process (kJ). [1 dp] (3 mark).ii) The change in the specific internal energy during the process (kJ/kg) [1 dp] (1 mark).

Q2. A compression ignition engine has as single cylinder with a bore of 23.20cm and a stroke of 30.60cm. The compression ratio is 13 to 1. At the start of the expansion stroke the gases in the clearance volume have a pressure of 5.20 Bars and it is assumed that the expansion is a reversible polytropic process to the law PV1.38 = C. Calculate

i) The pressure at the end of the stroke (Pa). [1 dp] (2 mark).ii) The work done (kJ). [4 dp] (1 mark).

Q3. Provide a multiple-choice type question that could be used to help revision. The question can be from any of the material covered in this subject. Naturally you should present the question and the possible responses together with the correct answer. Whilst there are many possible question types I am only asking for a multiple-choice type question that has one correct answer. You should also write the question such that you seek to get the correct answer from 5 possible alternatives. i.e. Yes/No True false questions are not allowed. Note it is my intention to use these as part of the revision process. (3 marks)

WATS 7. Student number8

Fluid Mechanics and Thermodynamics.Weekly Assessed Tutorial Sheet 7.

Student Number 9

Name

Hand out date Hand in date

Q1. A quantity of a fluid, of mass 0.05 kg, is contained in a vertical heat insulated cylinder, sealed at the top by a frictionless piston. The piston has a diameter of 1.23 m and its weight produces a pressure of 0.80 MN/m2 in the fluid. The fluid is stirred by a paddle for 51 minutes and during this time the period the paddle absorbs 1.660 kW of power and the piston rises a distance of 0.38 m. Calculate

i) The change in internal energy of the fluid during the process (kJ). [1 dp] (3 mark).ii) The change in the specific internal energy during the process (kJ/kg) [1 dp] (1 mark).

Q2. A compression ignition engine has as single cylinder with a bore of 11.00cm and a stroke of 35.30cm. The compression ratio is 11 to 1. At the start of the expansion stroke the gases in the clearance volume have a pressure of 5.20 Bars and it is assumed that the expansion is a reversible polytropic process to the law PV1.18 = C. Calculate

i) The pressure at the end of the stroke (Pa). [1 dp] (2 mark).ii) The work done (kJ). [4 dp] (1 mark).

Q3. Provide a multiple-choice type question that could be used to help revision. The question can be from any of the material covered in this subject. Naturally you should present the question and the possible responses together with the correct answer. Whilst there are many possible question types I am only asking for a multiple-choice type question that has one correct answer. You should also write the question such that you seek to get the correct answer from 5 possible alternatives. i.e. Yes/No True false questions are not allowed. Note it is my intention to use these as part of the revision process. (3 marks)

WATS 7. Student number9

Fluid Mechanics and Thermodynamics.Weekly Assessed Tutorial Sheet 7.

Student Number 10

Name

Hand out date Hand in date

Q1. A quantity of a fluid, of mass 0.30 kg, is contained in a vertical heat insulated cylinder, sealed at the top by a frictionless piston. The piston has a diameter of 0.17 m and its weight produces a pressure of 0.30 MN/m2 in the fluid. The fluid is stirred by a paddle for 21 minutes and during this time the period the paddle absorbs 0.880 kW of power and the piston rises a distance of 0.49 m. Calculate

i) The change in internal energy of the fluid during the process (kJ). [1 dp] (3 mark).ii) The change in the specific internal energy during the process (kJ/kg) [1 dp] (1 mark).

Q2. A compression ignition engine has as single cylinder with a bore of 17.20cm and a stroke of 38.80cm. The compression ratio is 14 to 1. At the start of the expansion stroke the gases in the clearance volume have a pressure of 6.70 Bars and it is assumed that the expansion is a reversible polytropic process to the law PV1.05 = C. Calculate

i) The pressure at the end of the stroke (Pa). [1 dp] (2 mark).ii) The work done (kJ). [4 dp] (1 mark).

Q3. Provide a multiple-choice type question that could be used to help revision. The question can be from any of the material covered in this subject. Naturally you should present the question and the possible responses together with the correct answer. Whilst there are many possible question types I am only asking for a multiple-choice type question that has one correct answer. You should also write the question such that you seek to get the correct answer from 5 possible alternatives. i.e. Yes/No True false questions are not allowed. Note it is my intention to use these as part of the revision process. (3 marks)

WATS 7. Student number10

Fluid Mechanics and Thermodynamics.Weekly Assessed Tutorial Sheet 7.

Student Number 11

Name

Hand out date Hand in date

Q1. A quantity of a fluid, of mass 0.62 kg, is contained in a vertical heat insulated cylinder, sealed at the top by a frictionless piston. The piston has a diameter of 0.24 m and its weight produces a pressure of 0.30 MN/m2 in the fluid. The fluid is stirred by a paddle for 56 minutes and during this time the period the paddle absorbs 1.370 kW of power and the piston rises a distance of 0.06 m. Calculate

i) The change in internal energy of the fluid during the process (kJ). [1 dp] (3 mark).ii) The change in the specific internal energy during the process (kJ/kg) [1 dp] (1 mark).

Q2. A compression ignition engine has as single cylinder with a bore of 21.60cm and a stroke of 15.10cm. The compression ratio is 8 to 1. At the start of the expansion stroke the gases in the clearance volume have a pressure of 5.20 Bars and it is assumed that the expansion is a reversible polytropic process to the law PV1.36 = C. Calculate

i) The pressure at the end of the stroke (Pa). [1 dp] (2 mark).ii) The work done (kJ). [4 dp] (1 mark).

Q3. Provide a multiple-choice type question that could be used to help revision. The question can be from any of the material covered in this subject. Naturally you should present the question and the possible responses together with the correct answer. Whilst there are many possible question types I am only asking for a multiple-choice type question that has one correct answer. You should also write the question such that you seek to get the correct answer from 5 possible alternatives. i.e. Yes/No True false questions are not allowed. Note it is my intention to use these as part of the revision process. (3 marks)

WATS 7. Student number11

Fluid Mechanics and Thermodynamics.Weekly Assessed Tutorial Sheet 7.

Student Number 12

Name

Hand out date Hand in date

Q1. A quantity of a fluid, of mass 0.48 kg, is contained in a vertical heat insulated cylinder, sealed at the top by a frictionless piston. The piston has a diameter of 0.29 m and its weight produces a pressure of 1.10 MN/m2 in the fluid. The fluid is stirred by a paddle for 44 minutes and during this time the period the paddle absorbs 0.100 kW of power and the piston rises a distance of 0.40 m. Calculate

i) The change in internal energy of the fluid during the process (kJ). [1 dp] (3 mark).ii) The change in the specific internal energy during the process (kJ/kg) [1 dp] (1 mark).

Q2. A compression ignition engine has as single cylinder with a bore of 15.00cm and a stroke of 24.90cm. The compression ratio is 13 to 1. At the start of the expansion stroke the gases in the clearance volume have a pressure of 9.80 Bars and it is assumed that the expansion is a reversible polytropic process to the law PV1.07 = C. Calculate

i) The pressure at the end of the stroke (Pa). [1 dp] (2 mark).ii) The work done (kJ). [4 dp] (1 mark).

Q3. Provide a multiple-choice type question that could be used to help revision. The question can be from any of the material covered in this subject. Naturally you should present the question and the possible responses together with the correct answer. Whilst there are many possible question types I am only asking for a multiple-choice type question that has one correct answer. You should also write the question such that you seek to get the correct answer from 5 possible alternatives. i.e. Yes/No True false questions are not allowed. Note it is my intention to use these as part of the revision process. (3 marks)

WATS 7. Student number12

Fluid Mechanics and Thermodynamics.Weekly Assessed Tutorial Sheet 7.

Student Number 13

Name

Hand out date Hand in date

Q1. A quantity of a fluid, of mass 0.25 kg, is contained in a vertical heat insulated cylinder, sealed at the top by a frictionless piston. The piston has a diameter of 1.31 m and its weight produces a pressure of 1.00 MN/m2 in the fluid. The fluid is stirred by a paddle for 11 minutes and during this time the period the paddle absorbs 1.220 kW of power and the piston rises a distance of 0.17 m. Calculate

i) The change in internal energy of the fluid during the process (kJ). [1 dp] (3 mark).ii) The change in the specific internal energy during the process (kJ/kg) [1 dp] (1 mark).

Q2. A compression ignition engine has as single cylinder with a bore of 12.20cm and a stroke of 37.10cm. The compression ratio is 11 to 1. At the start of the expansion stroke the gases in the clearance volume have a pressure of 3.30 Bars and it is assumed that the expansion is a reversible polytropic process to the law PV1.09 = C. Calculate

i) The pressure at the end of the stroke (Pa). [1 dp] (2 mark).ii) The work done (kJ). [4 dp] (1 mark).

Q3. Provide a multiple-choice type question that could be used to help revision. The question can be from any of the material covered in this subject. Naturally you should present the question and the possible responses together with the correct answer. Whilst there are many possible question types I am only asking for a multiple-choice type question that has one correct answer. You should also write the question such that you seek to get the correct answer from 5 possible alternatives. i.e. Yes/No True false questions are not allowed. Note it is my intention to use these as part of the revision process. (3 marks)

WATS 7. Student number13

Fluid Mechanics and Thermodynamics.Weekly Assessed Tutorial Sheet 7.

Student Number 14

Name

Hand out date Hand in date

Q1. A quantity of a fluid, of mass 0.52 kg, is contained in a vertical heat insulated cylinder, sealed at the top by a frictionless piston. The piston has a diameter of 1.10 m and its weight produces a pressure of 1.20 MN/m2 in the fluid. The fluid is stirred by a paddle for 20 minutes and during this time the period the paddle absorbs 1.390 kW of power and the piston rises a distance of 0.09 m. Calculate

i) The change in internal energy of the fluid during the process (kJ). [1 dp] (3 mark).ii) The change in the specific internal energy during the process (kJ/kg) [1 dp] (1 mark).

Q2. A compression ignition engine has as single cylinder with a bore of 19.40cm and a stroke of 38.60cm. The compression ratio is 17 to 1. At the start of the expansion stroke the gases in the clearance volume have a pressure of 3.80 Bars and it is assumed that the expansion is a reversible polytropic process to the law PV1.30 = C. Calculate

i) The pressure at the end of the stroke (Pa). [1 dp] (2 mark).ii) The work done (kJ). [4 dp] (1 mark).

Q3. Provide a multiple-choice type question that could be used to help revision. The question can be from any of the material covered in this subject. Naturally you should present the question and the possible responses together with the correct answer. Whilst there are many possible question types I am only asking for a multiple-choice type question that has one correct answer. You should also write the question such that you seek to get the correct answer from 5 possible alternatives. i.e. Yes/No True false questions are not allowed. Note it is my intention to use these as part of the revision process. (3 marks)

WATS 7. Student number14

Fluid Mechanics and Thermodynamics.Weekly Assessed Tutorial Sheet 7.

Student Number 15

Name

Hand out date Hand in date

Q1. A quantity of a fluid, of mass 0.23 kg, is contained in a vertical heat insulated cylinder, sealed at the top by a frictionless piston. The piston has a diameter of 0.39 m and its weight produces a pressure of 0.20 MN/m2 in the fluid. The fluid is stirred by a paddle for 32 minutes and during this time the period the paddle absorbs 0.650 kW of power and the piston rises a distance of 0.41 m. Calculate

i) The change in internal energy of the fluid during the process (kJ). [1 dp] (3 mark).ii) The change in the specific internal energy during the process (kJ/kg) [1 dp] (1 mark).

Q2. A compression ignition engine has as single cylinder with a bore of 16.40cm and a stroke of 44.90cm. The compression ratio is 8 to 1. At the start of the expansion stroke the gases in the clearance volume have a pressure of 3.10 Bars and it is assumed that the expansion is a reversible polytropic process to the law PV1.24 = C. Calculate

i) The pressure at the end of the stroke (Pa). [1 dp] (2 mark).ii) The work done (kJ). [4 dp] (1 mark).

Q3. Provide a multiple-choice type question that could be used to help revision. The question can be from any of the material covered in this subject. Naturally you should present the question and the possible responses together with the correct answer. Whilst there are many possible question types I am only asking for a multiple-choice type question that has one correct answer. You should also write the question such that you seek to get the correct answer from 5 possible alternatives. i.e. Yes/No True false questions are not allowed. Note it is my intention to use these as part of the revision process. (3 marks)

WATS 7. Student number15

Fluid Mechanics and Thermodynamics.Weekly Assessed Tutorial Sheet 7.

Student Number 16

Name

Hand out date Hand in date

Q1. A quantity of a fluid, of mass 0.66 kg, is contained in a vertical heat insulated cylinder, sealed at the top by a frictionless piston. The piston has a diameter of 1.24 m and its weight produces a pressure of 0.90 MN/m2 in the fluid. The fluid is stirred by a paddle for 24 minutes and during this time the period the paddle absorbs 0.930 kW of power and the piston rises a distance of 0.39 m. Calculate

i) The change in internal energy of the fluid during the process (kJ). [1 dp] (3 mark).ii) The change in the specific internal energy during the process (kJ/kg) [1 dp] (1 mark).

Q2. A compression ignition engine has as single cylinder with a bore of 13.00cm and a stroke of 15.10cm. The compression ratio is 14 to 1. At the start of the expansion stroke the gases in the clearance volume have a pressure of 8.60 Bars and it is assumed that the expansion is a reversible polytropic process to the law PV1.21 = C. Calculate

i) The pressure at the end of the stroke (Pa). [1 dp] (2 mark).ii) The work done (kJ). [4 dp] (1 mark).

Q3. Provide a multiple-choice type question that could be used to help revision. The question can be from any of the material covered in this subject. Naturally you should present the question and the possible responses together with the correct answer. Whilst there are many possible question types I am only asking for a multiple-choice type question that has one correct answer. You should also write the question such that you seek to get the correct answer from 5 possible alternatives. i.e. Yes/No True false questions are not allowed. Note it is my intention to use these as part of the revision process. (3 marks)

WATS 7. Student number16

Fluid Mechanics and Thermodynamics.Weekly Assessed Tutorial Sheet 7.

Student Number 17

Name

Hand out date Hand in date

Q1. A quantity of a fluid, of mass 0.79 kg, is contained in a vertical heat insulated cylinder, sealed at the top by a frictionless piston. The piston has a diameter of 1.19 m and its weight produces a pressure of 0.70 MN/m2 in the fluid. The fluid is stirred by a paddle for 53 minutes and during this time the period the paddle absorbs 0.800 kW of power and the piston rises a distance of 0.26 m. Calculate

i) The change in internal energy of the fluid during the process (kJ). [1 dp] (3 mark).ii) The change in the specific internal energy during the process (kJ/kg) [1 dp] (1 mark).

Q2. A compression ignition engine has as single cylinder with a bore of 23.30cm and a stroke of 37.70cm. The compression ratio is 18 to 1. At the start of the expansion stroke the gases in the clearance volume have a pressure of 5.60 Bars and it is assumed that the expansion is a reversible polytropic process to the law PV1.28 = C. Calculate

i) The pressure at the end of the stroke (Pa). [1 dp] (2 mark).ii) The work done (kJ). [4 dp] (1 mark).

Q3. Provide a multiple-choice type question that could be used to help revision. The question can be from any of the material covered in this subject. Naturally you should present the question and the possible responses together with the correct answer. Whilst there are many possible question types I am only asking for a multiple-choice type question that has one correct answer. You should also write the question such that you seek to get the correct answer from 5 possible alternatives. i.e. Yes/No True false questions are not allowed. Note it is my intention to use these as part of the revision process. (3 marks)

WATS 7. Student number17

Fluid Mechanics and Thermodynamics.Weekly Assessed Tutorial Sheet 7.

Student Number 18

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Q1. A quantity of a fluid, of mass 0.19 kg, is contained in a vertical heat insulated cylinder, sealed at the top by a frictionless piston. The piston has a diameter of 0.68 m and its weight produces a pressure of 0.30 MN/m2 in the fluid. The fluid is stirred by a paddle for 27 minutes and during this time the period the paddle absorbs 0.750 kW of power and the piston rises a distance of 0.35 m. Calculate

i) The change in internal energy of the fluid during the process (kJ). [1 dp] (3 mark).ii) The change in the specific internal energy during the process (kJ/kg) [1 dp] (1 mark).

Q2. A compression ignition engine has as single cylinder with a bore of 11.30cm and a stroke of 38.30cm. The compression ratio is 15 to 1. At the start of the expansion stroke the gases in the clearance volume have a pressure of 7.20 Bars and it is assumed that the expansion is a reversible polytropic process to the law PV1.15 = C. Calculate

i) The pressure at the end of the stroke (Pa). [1 dp] (2 mark).ii) The work done (kJ). [4 dp] (1 mark).

Q3. Provide a multiple-choice type question that could be used to help revision. The question can be from any of the material covered in this subject. Naturally you should present the question and the possible responses together with the correct answer. Whilst there are many possible question types I am only asking for a multiple-choice type question that has one correct answer. You should also write the question such that you seek to get the correct answer from 5 possible alternatives. i.e. Yes/No True false questions are not allowed. Note it is my intention to use these as part of the revision process. (3 marks)

WATS 7. Student number18

Fluid Mechanics and Thermodynamics.Weekly Assessed Tutorial Sheet 7.

Student Number 19

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Q1. A quantity of a fluid, of mass 0.78 kg, is contained in a vertical heat insulated cylinder, sealed at the top by a frictionless piston. The piston has a diameter of 1.21 m and its weight produces a pressure of 1.50 MN/m2 in the fluid. The fluid is stirred by a paddle for 53 minutes and during this time the period the paddle absorbs 1.950 kW of power and the piston rises a distance of 0.12 m. Calculate

i) The change in internal energy of the fluid during the process (kJ). [1 dp] (3 mark).ii) The change in the specific internal energy during the process (kJ/kg) [1 dp] (1 mark).

Q2. A compression ignition engine has as single cylinder with a bore of 16.90cm and a stroke of 22.50cm. The compression ratio is 18 to 1. At the start of the expansion stroke the gases in the clearance volume have a pressure of 6.60 Bars and it is assumed that the expansion is a reversible polytropic process to the law PV1.03 = C. Calculate

i) The pressure at the end of the stroke (Pa). [1 dp] (2 mark).ii) The work done (kJ). [4 dp] (1 mark).

Q3. Provide a multiple-choice type question that could be used to help revision. The question can be from any of the material covered in this subject. Naturally you should present the question and the possible responses together with the correct answer. Whilst there are many possible question types I am only asking for a multiple-choice type question that has one correct answer. You should also write the question such that you seek to get the correct answer from 5 possible alternatives. i.e. Yes/No True false questions are not allowed. Note it is my intention to use these as part of the revision process. (3 marks)

WATS 7. Student number19

Fluid Mechanics and Thermodynamics.Weekly Assessed Tutorial Sheet 7.

Student Number 20

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Q1. A quantity of a fluid, of mass 0.43 kg, is contained in a vertical heat insulated cylinder, sealed at the top by a frictionless piston. The piston has a diameter of 0.31 m and its weight produces a pressure of 0.50 MN/m2 in the fluid. The fluid is stirred by a paddle for 40 minutes and during this time the period the paddle absorbs 0.600 kW of power and the piston rises a distance of 0.33 m. Calculate

i) The change in internal energy of the fluid during the process (kJ). [1 dp] (3 mark).ii) The change in the specific internal energy during the process (kJ/kg) [1 dp] (1 mark).

Q2. A compression ignition engine has as single cylinder with a bore of 14.20cm and a stroke of 17.60cm. The compression ratio is 9 to 1. At the start of the expansion stroke the gases in the clearance volume have a pressure of 7.80 Bars and it is assumed that the expansion is a reversible polytropic process to the law PV1.20 = C. Calculate

i) The pressure at the end of the stroke (Pa). [1 dp] (2 mark).ii) The work done (kJ). [4 dp] (1 mark).

Q3. Provide a multiple-choice type question that could be used to help revision. The question can be from any of the material covered in this subject. Naturally you should present the question and the possible responses together with the correct answer. Whilst there are many possible question types I am only asking for a multiple-choice type question that has one correct answer. You should also write the question such that you seek to get the correct answer from 5 possible alternatives. i.e. Yes/No True false questions are not allowed. Note it is my intention to use these as part of the revision process. (3 marks)

WATS 7. Student number20

Fluid Mechanics and Thermodynamics.Weekly Assessed Tutorial Sheet 7.

Student Number 21

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Q1. A quantity of a fluid, of mass 0.80 kg, is contained in a vertical heat insulated cylinder, sealed at the top by a frictionless piston. The piston has a diameter of 0.55 m and its weight produces a pressure of 0.80 MN/m2 in the fluid. The fluid is stirred by a paddle for 57 minutes and during this time the period the paddle absorbs 1.370 kW of power and the piston rises a distance of 0.39 m. Calculate

i) The change in internal energy of the fluid during the process (kJ). [1 dp] (3 mark).ii) The change in the specific internal energy during the process (kJ/kg) [1 dp] (1 mark).

Q2. A compression ignition engine has as single cylinder with a bore of 19.30cm and a stroke of 45.10cm. The compression ratio is 12 to 1. At the start of the expansion stroke the gases in the clearance volume have a pressure of 4.10 Bars and it is assumed that the expansion is a reversible polytropic process to the law PV1.35 = C. Calculate

i) The pressure at the end of the stroke (Pa). [1 dp] (2 mark).ii) The work done (kJ). [4 dp] (1 mark).

Q3. Provide a multiple-choice type question that could be used to help revision. The question can be from any of the material covered in this subject. Naturally you should present the question and the possible responses together with the correct answer. Whilst there are many possible question types I am only asking for a multiple-choice type question that has one correct answer. You should also write the question such that you seek to get the correct answer from 5 possible alternatives. i.e. Yes/No True false questions are not allowed. Note it is my intention to use these as part of the revision process. (3 marks)

WATS 7. Student number21

Fluid Mechanics and Thermodynamics.Weekly Assessed Tutorial Sheet 7.

Student Number 22

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Q1. A quantity of a fluid, of mass 0.02 kg, is contained in a vertical heat insulated cylinder, sealed at the top by a frictionless piston. The piston has a diameter of 0.52 m and its weight produces a pressure of 0.70 MN/m2 in the fluid. The fluid is stirred by a paddle for 11 minutes and during this time the period the paddle absorbs 1.870 kW of power and the piston rises a distance of 0.21 m. Calculate

i) The change in internal energy of the fluid during the process (kJ). [1 dp] (3 mark).ii) The change in the specific internal energy during the process (kJ/kg) [1 dp] (1 mark).

Q2. A compression ignition engine has as single cylinder with a bore of 20.80cm and a stroke of 38.30cm. The compression ratio is 9 to 1. At the start of the expansion stroke the gases in the clearance volume have a pressure of 3.60 Bars and it is assumed that the expansion is a reversible polytropic process to the law PV1.15 = C. Calculate

i) The pressure at the end of the stroke (Pa). [1 dp] (2 mark).ii) The work done (kJ). [4 dp] (1 mark).

Q3. Provide a multiple-choice type question that could be used to help revision. The question can be from any of the material covered in this subject. Naturally you should present the question and the possible responses together with the correct answer. Whilst there are many possible question types I am only asking for a multiple-choice type question that has one correct answer. You should also write the question such that you seek to get the correct answer from 5 possible alternatives. i.e. Yes/No True false questions are not allowed. Note it is my intention to use these as part of the revision process. (3 marks)

WATS 7. Student number22

Fluid Mechanics and Thermodynamics.Weekly Assessed Tutorial Sheet 7.

Student Number 23

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Q1. A quantity of a fluid, of mass 0.09 kg, is contained in a vertical heat insulated cylinder, sealed at the top by a frictionless piston. The piston has a diameter of 0.64 m and its weight produces a pressure of 1.40 MN/m2 in the fluid. The fluid is stirred by a paddle for 40 minutes and during this time the period the paddle absorbs 1.210 kW of power and the piston rises a distance of 0.20 m. Calculate

i) The change in internal energy of the fluid during the process (kJ). [1 dp] (3 mark).ii) The change in the specific internal energy during the process (kJ/kg) [1 dp] (1 mark).

Q2. A compression ignition engine has as single cylinder with a bore of 18.10cm and a stroke of 20.40cm. The compression ratio is 12 to 1. At the start of the expansion stroke the gases in the clearance volume have a pressure of 6.80 Bars and it is assumed that the expansion is a reversible polytropic process to the law PV1.22 = C. Calculate

i) The pressure at the end of the stroke (Pa). [1 dp] (2 mark).ii) The work done (kJ). [4 dp] (1 mark).

Q3. Provide a multiple-choice type question that could be used to help revision. The question can be from any of the material covered in this subject. Naturally you should present the question and the possible responses together with the correct answer. Whilst there are many possible question types I am only asking for a multiple-choice type question that has one correct answer. You should also write the question such that you seek to get the correct answer from 5 possible alternatives. i.e. Yes/No True false questions are not allowed. Note it is my intention to use these as part of the revision process. (3 marks)

WATS 7. Student number23

Fluid Mechanics and Thermodynamics.Weekly Assessed Tutorial Sheet 7.

Student Number 24

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Q1. A quantity of a fluid, of mass 0.64 kg, is contained in a vertical heat insulated cylinder, sealed at the top by a frictionless piston. The piston has a diameter of 0.08 m and its weight produces a pressure of 0.30 MN/m2 in the fluid. The fluid is stirred by a paddle for 42 minutes and during this time the period the paddle absorbs 0.440 kW of power and the piston rises a distance of 0.39 m. Calculate

i) The change in internal energy of the fluid during the process (kJ). [1 dp] (3 mark).ii) The change in the specific internal energy during the process (kJ/kg) [1 dp] (1 mark).

Q2. A compression ignition engine has as single cylinder with a bore of 18.90cm and a stroke of 20.90cm. The compression ratio is 10 to 1. At the start of the expansion stroke the gases in the clearance volume have a pressure of 7.30 Bars and it is assumed that the expansion is a reversible polytropic process to the law PV1.30 = C. Calculate

i) The pressure at the end of the stroke (Pa). [1 dp] (2 mark).ii) The work done (kJ). [4 dp] (1 mark).

Q3. Provide a multiple-choice type question that could be used to help revision. The question can be from any of the material covered in this subject. Naturally you should present the question and the possible responses together with the correct answer. Whilst there are many possible question types I am only asking for a multiple-choice type question that has one correct answer. You should also write the question such that you seek to get the correct answer from 5 possible alternatives. i.e. Yes/No True false questions are not allowed. Note it is my intention to use these as part of the revision process. (3 marks)

WATS 7. Student number24

Fluid Mechanics and Thermodynamics.Weekly Assessed Tutorial Sheet 7.

Student Number 25

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Q1. A quantity of a fluid, of mass 0.05 kg, is contained in a vertical heat insulated cylinder, sealed at the top by a frictionless piston. The piston has a diameter of 0.32 m and its weight produces a pressure of 0.60 MN/m2 in the fluid. The fluid is stirred by a paddle for 46 minutes and during this time the period the paddle absorbs 1.640 kW of power and the piston rises a distance of 0.23 m. Calculate

i) The change in internal energy of the fluid during the process (kJ). [1 dp] (3 mark).ii) The change in the specific internal energy during the process (kJ/kg) [1 dp] (1 mark).

Q2. A compression ignition engine has as single cylinder with a bore of 17.30cm and a stroke of 25.90cm. The compression ratio is 12 to 1. At the start of the expansion stroke the gases in the clearance volume have a pressure of 5.80 Bars and it is assumed that the expansion is a reversible polytropic process to the law PV1.22 = C. Calculate

i) The pressure at the end of the stroke (Pa). [1 dp] (2 mark).ii) The work done (kJ). [4 dp] (1 mark).

Q3. Provide a multiple-choice type question that could be used to help revision. The question can be from any of the material covered in this subject. Naturally you should present the question and the possible responses together with the correct answer. Whilst there are many possible question types I am only asking for a multiple-choice type question that has one correct answer. You should also write the question such that you seek to get the correct answer from 5 possible alternatives. i.e. Yes/No True false questions are not allowed. Note it is my intention to use these as part of the revision process. (3 marks)

WATS 7. Student number25

Fluid Mechanics and Thermodynamics.Weekly Assessed Tutorial Sheet 7.

Student Number 26

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Q1. A quantity of a fluid, of mass 0.31 kg, is contained in a vertical heat insulated cylinder, sealed at the top by a frictionless piston. The piston has a diameter of 1.40 m and its weight produces a pressure of 0.70 MN/m2 in the fluid. The fluid is stirred by a paddle for 13 minutes and during this time the period the paddle absorbs 0.960 kW of power and the piston rises a distance of 0.21 m. Calculate

i) The change in internal energy of the fluid during the process (kJ). [1 dp] (3 mark).ii) The change in the specific internal energy during the process (kJ/kg) [1 dp] (1 mark).

Q2. A compression ignition engine has as single cylinder with a bore of 22.40cm and a stroke of 19.60cm. The compression ratio is 16 to 1. At the start of the expansion stroke the gases in the clearance volume have a pressure of 7.10 Bars and it is assumed that the expansion is a reversible polytropic process to the law PV1.26 = C. Calculate

i) The pressure at the end of the stroke (Pa). [1 dp] (2 mark).ii) The work done (kJ). [4 dp] (1 mark).

Q3. Provide a multiple-choice type question that could be used to help revision. The question can be from any of the material covered in this subject. Naturally you should present the question and the possible responses together with the correct answer. Whilst there are many possible question types I am only asking for a multiple-choice type question that has one correct answer. You should also write the question such that you seek to get the correct answer from 5 possible alternatives. i.e. Yes/No True false questions are not allowed. Note it is my intention to use these as part of the revision process. (3 marks)

WATS 7. Student number26

Fluid Mechanics and Thermodynamics.Weekly Assessed Tutorial Sheet 7.

Student Number 27

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Q1. A quantity of a fluid, of mass 0.76 kg, is contained in a vertical heat insulated cylinder, sealed at the top by a frictionless piston. The piston has a diameter of 1.26 m and its weight produces a pressure of 0.20 MN/m2 in the fluid. The fluid is stirred by a paddle for 20 minutes and during this time the period the paddle absorbs 0.190 kW of power and the piston rises a distance of 0.36 m. Calculate

i) The change in internal energy of the fluid during the process (kJ). [1 dp] (3 mark).ii) The change in the specific internal energy during the process (kJ/kg) [1 dp] (1 mark).

Q2. A compression ignition engine has as single cylinder with a bore of 16.40cm and a stroke of 44.10cm. The compression ratio is 15 to 1. At the start of the expansion stroke the gases in the clearance volume have a pressure of 3.30 Bars and it is assumed that the expansion is a reversible polytropic process to the law PV1.19 = C. Calculate

i) The pressure at the end of the stroke (Pa). [1 dp] (2 mark).ii) The work done (kJ). [4 dp] (1 mark).

Q3. Provide a multiple-choice type question that could be used to help revision. The question can be from any of the material covered in this subject. Naturally you should present the question and the possible responses together with the correct answer. Whilst there are many possible question types I am only asking for a multiple-choice type question that has one correct answer. You should also write the question such that you seek to get the correct answer from 5 possible alternatives. i.e. Yes/No True false questions are not allowed. Note it is my intention to use these as part of the revision process. (3 marks)

WATS 7. Student number27

Fluid Mechanics and Thermodynamics.Weekly Assessed Tutorial Sheet 7.

Student Number 28

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Q1. A quantity of a fluid, of mass 0.33 kg, is contained in a vertical heat insulated cylinder, sealed at the top by a frictionless piston. The piston has a diameter of 1.21 m and its weight produces a pressure of 0.60 MN/m2 in the fluid. The fluid is stirred by a paddle for 19 minutes and during this time the period the paddle absorbs 1.220 kW of power and the piston rises a distance of 0.14 m. Calculate

i) The change in internal energy of the fluid during the process (kJ). [1 dp] (3 mark).ii) The change in the specific internal energy during the process (kJ/kg) [1 dp] (1 mark).

Q2. A compression ignition engine has as single cylinder with a bore of 22.90cm and a stroke of 38.20cm. The compression ratio is 18 to 1. At the start of the expansion stroke the gases in the clearance volume have a pressure of 4.70 Bars and it is assumed that the expansion is a reversible polytropic process to the law PV1.25 = C. Calculate

i) The pressure at the end of the stroke (Pa). [1 dp] (2 mark).ii) The work done (kJ). [4 dp] (1 mark).

Q3. Provide a multiple-choice type question that could be used to help revision. The question can be from any of the material covered in this subject. Naturally you should present the question and the possible responses together with the correct answer. Whilst there are many possible question types I am only asking for a multiple-choice type question that has one correct answer. You should also write the question such that you seek to get the correct answer from 5 possible alternatives. i.e. Yes/No True false questions are not allowed. Note it is my intention to use these as part of the revision process. (3 marks)

WATS 7. Student number28

Fluid Mechanics and Thermodynamics.Weekly Assessed Tutorial Sheet 7.

Student Number 29

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Q1. A quantity of a fluid, of mass 0.14 kg, is contained in a vertical heat insulated cylinder, sealed at the top by a frictionless piston. The piston has a diameter of 0.40 m and its weight produces a pressure of 1.30 MN/m2 in the fluid. The fluid is stirred by a paddle for 55 minutes and during this time the period the paddle absorbs 0.990 kW of power and the piston rises a distance of 0.47 m. Calculate

i) The change in internal energy of the fluid during the process (kJ). [1 dp] (3 mark).ii) The change in the specific internal energy during the process (kJ/kg) [1 dp] (1 mark).

Q2. A compression ignition engine has as single cylinder with a bore of 24.30cm and a stroke of 28.60cm. The compression ratio is 12 to 1. At the start of the expansion stroke the gases in the clearance volume have a pressure of 4.20 Bars and it is assumed that the expansion is a reversible polytropic process to the law PV1.29 = C. Calculate

i) The pressure at the end of the stroke (Pa). [1 dp] (2 mark).ii) The work done (kJ). [4 dp] (1 mark).

Q3. Provide a multiple-choice type question that could be used to help revision. The question can be from any of the material covered in this subject. Naturally you should present the question and the possible responses together with the correct answer. Whilst there are many possible question types I am only asking for a multiple-choice type question that has one correct answer. You should also write the question such that you seek to get the correct answer from 5 possible alternatives. i.e. Yes/No True false questions are not allowed. Note it is my intention to use these as part of the revision process. (3 marks)

WATS 7. Student number29

Fluid Mechanics and Thermodynamics.Weekly Assessed Tutorial Sheet 7.

Student Number 30

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Q1. A quantity of a fluid, of mass 0.52 kg, is contained in a vertical heat insulated cylinder, sealed at the top by a frictionless piston. The piston has a diameter of 1.04 m and its weight produces a pressure of 0.90 MN/m2 in the fluid. The fluid is stirred by a paddle for 23 minutes and during this time the period the paddle absorbs 1.700 kW of power and the piston rises a distance of 0.39 m. Calculate

i) The change in internal energy of the fluid during the process (kJ). [1 dp] (3 mark).ii) The change in the specific internal energy during the process (kJ/kg) [1 dp] (1 mark).

Q2. A compression ignition engine has as single cylinder with a bore of 20.00cm and a stroke of 31.70cm. The compression ratio is 12 to 1. At the start of the expansion stroke the gases in the clearance volume have a pressure of 7.60 Bars and it is assumed that the expansion is a reversible polytropic process to the law PV1.08 = C. Calculate

i) The pressure at the end of the stroke (Pa). [1 dp] (2 mark).ii) The work done (kJ). [4 dp] (1 mark).

Q3. Provide a multiple-choice type question that could be used to help revision. The question can be from any of the material covered in this subject. Naturally you should present the question and the possible responses together with the correct answer. Whilst there are many possible question types I am only asking for a multiple-choice type question that has one correct answer. You should also write the question such that you seek to get the correct answer from 5 possible alternatives. i.e. Yes/No True false questions are not allowed. Note it is my intention to use these as part of the revision process. (3 marks)

WATS 7. Student number30

Fluid Mechanics and Thermodynamics.Weekly Assessed Tutorial Sheet 7.

Student Number 31

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Q1. A quantity of a fluid, of mass 0.34 kg, is contained in a vertical heat insulated cylinder, sealed at the top by a frictionless piston. The piston has a diameter of 0.52 m and its weight produces a pressure of 0.20 MN/m2 in the fluid. The fluid is stirred by a paddle for 48 minutes and during this time the period the paddle absorbs 1.780 kW of power and the piston rises a distance of 0.11 m. Calculate

i) The change in internal energy of the fluid during the process (kJ). [1 dp] (3 mark).ii) The change in the specific internal energy during the process (kJ/kg) [1 dp] (1 mark).

Q2. A compression ignition engine has as single cylinder with a bore of 16.40cm and a stroke of 49.10cm. The compression ratio is 10 to 1. At the start of the expansion stroke the gases in the clearance volume have a pressure of 8.70 Bars and it is assumed that the expansion is a reversible polytropic process to the law PV1.30 = C. Calculate

i) The pressure at the end of the stroke (Pa). [1 dp] (2 mark).ii) The work done (kJ). [4 dp] (1 mark).

Q3. Provide a multiple-choice type question that could be used to help revision. The question can be from any of the material covered in this subject. Naturally you should present the question and the possible responses together with the correct answer. Whilst there are many possible question types I am only asking for a multiple-choice type question that has one correct answer. You should also write the question such that you seek to get the correct answer from 5 possible alternatives. i.e. Yes/No True false questions are not allowed. Note it is my intention to use these as part of the revision process. (3 marks)

WATS 7. Student number31

Fluid Mechanics and Thermodynamics.Weekly Assessed Tutorial Sheet 7.

Student Number 32

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Q1. A quantity of a fluid, of mass 0.27 kg, is contained in a vertical heat insulated cylinder, sealed at the top by a frictionless piston. The piston has a diameter of 0.17 m and its weight produces a pressure of 0.30 MN/m2 in the fluid. The fluid is stirred by a paddle for 18 minutes and during this time the period the paddle absorbs 0.310 kW of power and the piston rises a distance of 0.16 m. Calculate

i) The change in internal energy of the fluid during the process (kJ). [1 dp] (3 mark).ii) The change in the specific internal energy during the process (kJ/kg) [1 dp] (1 mark).

Q2. A compression ignition engine has as single cylinder with a bore of 10.10cm and a stroke of 19.70cm. The compression ratio is 14 to 1. At the start of the expansion stroke the gases in the clearance volume have a pressure of 7.10 Bars and it is assumed that the expansion is a reversible polytropic process to the law PV1.27 = C. Calculate

i) The pressure at the end of the stroke (Pa). [1 dp] (2 mark).ii) The work done (kJ). [4 dp] (1 mark).

Q3. Provide a multiple-choice type question that could be used to help revision. The question can be from any of the material covered in this subject. Naturally you should present the question and the possible responses together with the correct answer. Whilst there are many possible question types I am only asking for a multiple-choice type question that has one correct answer. You should also write the question such that you seek to get the correct answer from 5 possible alternatives. i.e. Yes/No True false questions are not allowed. Note it is my intention to use these as part of the revision process. (3 marks)

WATS 7. Student number32

Fluid Mechanics and Thermodynamics.Weekly Assessed Tutorial Sheet 7.

Student Number 33

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Q1. A quantity of a fluid, of mass 0.17 kg, is contained in a vertical heat insulated cylinder, sealed at the top by a frictionless piston. The piston has a diameter of 0.44 m and its weight produces a pressure of 1.20 MN/m2 in the fluid. The fluid is stirred by a paddle for 16 minutes and during this time the period the paddle absorbs 0.340 kW of power and the piston rises a distance of 0.40 m. Calculate

i) The change in internal energy of the fluid during the process (kJ). [1 dp] (3 mark).ii) The change in the specific internal energy during the process (kJ/kg) [1 dp] (1 mark).

Q2. A compression ignition engine has as single cylinder with a bore of 15.00cm and a stroke of 25.20cm. The compression ratio is 12 to 1. At the start of the expansion stroke the gases in the clearance volume have a pressure of 7.60 Bars and it is assumed that the expansion is a reversible polytropic process to the law PV1.16 = C. Calculate

i) The pressure at the end of the stroke (Pa). [1 dp] (2 mark).ii) The work done (kJ). [4 dp] (1 mark).

Q3. Provide a multiple-choice type question that could be used to help revision. The question can be from any of the material covered in this subject. Naturally you should present the question and the possible responses together with the correct answer. Whilst there are many possible question types I am only asking for a multiple-choice type question that has one correct answer. You should also write the question such that you seek to get the correct answer from 5 possible alternatives. i.e. Yes/No True false questions are not allowed. Note it is my intention to use these as part of the revision process. (3 marks)

WATS 7. Student number33

Fluid Mechanics and Thermodynamics.Weekly Assessed Tutorial Sheet 7.

Student Number 34

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Q1. A quantity of a fluid, of mass 0.47 kg, is contained in a vertical heat insulated cylinder, sealed at the top by a frictionless piston. The piston has a diameter of 0.84 m and its weight produces a pressure of 0.30 MN/m2 in the fluid. The fluid is stirred by a paddle for 53 minutes and during this time the period the paddle absorbs 1.050 kW of power and the piston rises a distance of 0.10 m. Calculate

i) The change in internal energy of the fluid during the process (kJ). [1 dp] (3 mark).ii) The change in the specific internal energy during the process (kJ/kg) [1 dp] (1 mark).

Q2. A compression ignition engine has as single cylinder with a bore of 24.20cm and a stroke of 35.10cm. The compression ratio is 16 to 1. At the start of the expansion stroke the gases in the clearance volume have a pressure of 6.40 Bars and it is assumed that the expansion is a reversible polytropic process to the law PV1.10 = C. Calculate

i) The pressure at the end of the stroke (Pa). [1 dp] (2 mark).ii) The work done (kJ). [4 dp] (1 mark).

Q3. Provide a multiple-choice type question that could be used to help revision. The question can be from any of the material covered in this subject. Naturally you should present the question and the possible responses together with the correct answer. Whilst there are many possible question types I am only asking for a multiple-choice type question that has one correct answer. You should also write the question such that you seek to get the correct answer from 5 possible alternatives. i.e. Yes/No True false questions are not allowed. Note it is my intention to use these as part of the revision process. (3 marks)

WATS 7. Student number34

Fluid Mechanics and Thermodynamics.Weekly Assessed Tutorial Sheet 7.

Student Number 35

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Q1. A quantity of a fluid, of mass 0.37 kg, is contained in a vertical heat insulated cylinder, sealed at the top by a frictionless piston. The piston has a diameter of 0.45 m and its weight produces a pressure of 1.10 MN/m2 in the fluid. The fluid is stirred by a paddle for 33 minutes and during this time the period the paddle absorbs 1.390 kW of power and the piston rises a distance of 0.34 m. Calculate

i) The change in internal energy of the fluid during the process (kJ). [1 dp] (3 mark).ii) The change in the specific internal energy during the process (kJ/kg) [1 dp] (1 mark).

Q2. A compression ignition engine has as single cylinder with a bore of 24.30cm and a stroke of 28.70cm. The compression ratio is 8 to 1. At the start of the expansion stroke the gases in the clearance volume have a pressure of 3.70 Bars and it is assumed that the expansion is a reversible polytropic process to the law PV1.19 = C. Calculate

i) The pressure at the end of the stroke (Pa). [1 dp] (2 mark).ii) The work done (kJ). [4 dp] (1 mark).

Q3. Provide a multiple-choice type question that could be used to help revision. The question can be from any of the material covered in this subject. Naturally you should present the question and the possible responses together with the correct answer. Whilst there are many possible question types I am only asking for a multiple-choice type question that has one correct answer. You should also write the question such that you seek to get the correct answer from 5 possible alternatives. i.e. Yes/No True false questions are not allowed. Note it is my intention to use these as part of the revision process. (3 marks)

WATS 7. Student number35

Fluid Mechanics and Thermodynamics.Weekly Assessed Tutorial Sheet 7.

Student Number 36

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Q1. A quantity of a fluid, of mass 0.22 kg, is contained in a vertical heat insulated cylinder, sealed at the top by a frictionless piston. The piston has a diameter of 0.47 m and its weight produces a pressure of 0.80 MN/m2 in the fluid. The fluid is stirred by a paddle for 22 minutes and during this time the period the paddle absorbs 0.200 kW of power and the piston rises a distance of 0.42 m. Calculate

i) The change in internal energy of the fluid during the process (kJ). [1 dp] (3 mark).ii) The change in the specific internal energy during the process (kJ/kg) [1 dp] (1 mark).

Q2. A compression ignition engine has as single cylinder with a bore of 19.70cm and a stroke of 45.30cm. The compression ratio is 9 to 1. At the start of the expansion stroke the gases in the clearance volume have a pressure of 3.10 Bars and it is assumed that the expansion is a reversible polytropic process to the law PV1.06 = C. Calculate

i) The pressure at the end of the stroke (Pa). [1 dp] (2 mark).ii) The work done (kJ). [4 dp] (1 mark).

Q3. Provide a multiple-choice type question that could be used to help revision. The question can be from any of the material covered in this subject. Naturally you should present the question and the possible responses together with the correct answer. Whilst there are many possible question types I am only asking for a multiple-choice type question that has one correct answer. You should also write the question such that you seek to get the correct answer from 5 possible alternatives. i.e. Yes/No True false questions are not allowed. Note it is my intention to use these as part of the revision process. (3 marks)

WATS 7. Student number36

Fluid Mechanics and Thermodynamics.Weekly Assessed Tutorial Sheet 7.

Student Number 37

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Q1. A quantity of a fluid, of mass 0.31 kg, is contained in a vertical heat insulated cylinder, sealed at the top by a frictionless piston. The piston has a diameter of 0.61 m and its weight produces a pressure of 1.50 MN/m2 in the fluid. The fluid is stirred by a paddle for 23 minutes and during this time the period the paddle absorbs 1.230 kW of power and the piston rises a distance of 0.33 m. Calculate

i) The change in internal energy of the fluid during the process (kJ). [1 dp] (3 mark).ii) The change in the specific internal energy during the process (kJ/kg) [1 dp] (1 mark).

Q2. A compression ignition engine has as single cylinder with a bore of 13.70cm and a stroke of 34.70cm. The compression ratio is 18 to 1. At the start of the expansion stroke the gases in the clearance volume have a pressure of 2.60 Bars and it is assumed that the expansion is a reversible polytropic process to the law PV1.30 = C. Calculate

i) The pressure at the end of the stroke (Pa). [1 dp] (2 mark).ii) The work done (kJ). [4 dp] (1 mark).

Q3. Provide a multiple-choice type question that could be used to help revision. The question can be from any of the material covered in this subject. Naturally you should present the question and the possible responses together with the correct answer. Whilst there are many possible question types I am only asking for a multiple-choice type question that has one correct answer. You should also write the question such that you seek to get the correct answer from 5 possible alternatives. i.e. Yes/No True false questions are not allowed. Note it is my intention to use these as part of the revision process. (3 marks)

WATS 7. Student number37

Fluid Mechanics and Thermodynamics.Weekly Assessed Tutorial Sheet 7.

Student Number 38

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Q1. A quantity of a fluid, of mass 0.74 kg, is contained in a vertical heat insulated cylinder, sealed at the top by a frictionless piston. The piston has a diameter of 0.62 m and its weight produces a pressure of 0.20 MN/m2 in the fluid. The fluid is stirred by a paddle for 13 minutes and during this time the period the paddle absorbs 1.580 kW of power and the piston rises a distance of 0.46 m. Calculate

i) The change in internal energy of the fluid during the process (kJ). [1 dp] (3 mark).ii) The change in the specific internal energy during the process (kJ/kg) [1 dp] (1 mark).

Q2. A compression ignition engine has as single cylinder with a bore of 15.10cm and a stroke of 23.40cm. The compression ratio is 8 to 1. At the start of the expansion stroke the gases in the clearance volume have a pressure of 4.70 Bars and it is assumed that the expansion is a reversible polytropic process to the law PV1.05 = C. Calculate

i) The pressure at the end of the stroke (Pa). [1 dp] (2 mark).ii) The work done (kJ). [4 dp] (1 mark).

Q3. Provide a multiple-choice type question that could be used to help revision. The question can be from any of the material covered in this subject. Naturally you should present the question and the possible responses together with the correct answer. Whilst there are many possible question types I am only asking for a multiple-choice type question that has one correct answer. You should also write the question such that you seek to get the correct answer from 5 possible alternatives. i.e. Yes/No True false questions are not allowed. Note it is my intention to use these as part of the revision process. (3 marks)

WATS 7. Student number38

Fluid Mechanics and Thermodynamics.Weekly Assessed Tutorial Sheet 7.

Student Number 39

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Q1. A quantity of a fluid, of mass 0.51 kg, is contained in a vertical heat insulated cylinder, sealed at the top by a frictionless piston. The piston has a diameter of 0.99 m and its weight produces a pressure of 0.60 MN/m2 in the fluid. The fluid is stirred by a paddle for 14 minutes and during this time the period the paddle absorbs 1.250 kW of power and the piston rises a distance of 0.43 m. Calculate

i) The change in internal energy of the fluid during the process (kJ). [1 dp] (3 mark).ii) The change in the specific internal energy during the process (kJ/kg) [1 dp] (1 mark).

Q2. A compression ignition engine has as single cylinder with a bore of 24.80cm and a stroke of 31.60cm. The compression ratio is 8 to 1. At the start of the expansion stroke the gases in the clearance volume have a pressure of 6.10 Bars and it is assumed that the expansion is a reversible polytropic process to the law PV1.08 = C. Calculate

i) The pressure at the end of the stroke (Pa). [1 dp] (2 mark).ii) The work done (kJ). [4 dp] (1 mark).

Q3. Provide a multiple-choice type question that could be used to help revision. The question can be from any of the material covered in this subject. Naturally you should present the question and the possible responses together with the correct answer. Whilst there are many possible question types I am only asking for a multiple-choice type question that has one correct answer. You should also write the question such that you seek to get the correct answer from 5 possible alternatives. i.e. Yes/No True false questions are not allowed. Note it is my intention to use these as part of the revision process. (3 marks)

WATS 7. Student number39

Fluid Mechanics and Thermodynamics.Weekly Assessed Tutorial Sheet 7.

Student Number 40

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Q1. A quantity of a fluid, of mass 0.09 kg, is contained in a vertical heat insulated cylinder, sealed at the top by a frictionless piston. The piston has a diameter of 1.43 m and its weight produces a pressure of 1.10 MN/m2 in the fluid. The fluid is stirred by a paddle for 23 minutes and during this time the period the paddle absorbs 1.870 kW of power and the piston rises a distance of 0.11 m. Calculate

i) The change in internal energy of the fluid during the process (kJ). [1 dp] (3 mark).ii) The change in the specific internal energy during the process (kJ/kg) [1 dp] (1 mark).

Q2. A compression ignition engine has as single cylinder with a bore of 19.30cm and a stroke of 26.90cm. The compression ratio is 13 to 1. At the start of the expansion stroke the gases in the clearance volume have a pressure of 7.30 Bars and it is assumed that the expansion is a reversible polytropic process to the law PV1.18 = C. Calculate

i) The pressure at the end of the stroke (Pa). [1 dp] (2 mark).ii) The work done (kJ). [4 dp] (1 mark).

Q3. Provide a multiple-choice type question that could be used to help revision. The question can be from any of the material covered in this subject. Naturally you should present the question and the possible responses together with the correct answer. Whilst there are many possible question types I am only asking for a multiple-choice type question that has one correct answer. You should also write the question such that you seek to get the correct answer from 5 possible alternatives. i.e. Yes/No True false questions are not allowed. Note it is my intention to use these as part of the revision process. (3 marks)

WATS 7. Student number40

Fluid Mechanics and Thermodynamics.Weekly Assessed Tutorial Sheet 7.

Student Number 41

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Q1. A quantity of a fluid, of mass 0.56 kg, is contained in a vertical heat insulated cylinder, sealed at the top by a frictionless piston. The piston has a diameter of 0.78 m and its weight produces a pressure of 0.60 MN/m2 in the fluid. The fluid is stirred by a paddle for 13 minutes and during this time the period the paddle absorbs 1.100 kW of power and the piston rises a distance of 0.08 m. Calculate

i) The change in internal energy of the fluid during the process (kJ). [1 dp] (3 mark).ii) The change in the specific internal energy during the process (kJ/kg) [1 dp] (1 mark).

Q2. A compression ignition engine has as single cylinder with a bore of 12.30cm and a stroke of 34.70cm. The compression ratio is 11 to 1. At the start of the expansion stroke the gases in the clearance volume have a pressure of 6.80 Bars and it is assumed that the expansion is a reversible polytropic process to the law PV1.37 = C. Calculate

i) The pressure at the end of the stroke (Pa). [1 dp] (2 mark).ii) The work done (kJ). [4 dp] (1 mark).

Q3. Provide a multiple-choice type question that could be used to help revision. The question can be from any of the material covered in this subject. Naturally you should present the question and the possible responses together with the correct answer. Whilst there are many possible question types I am only asking for a multiple-choice type question that has one correct answer. You should also write the question such that you seek to get the correct answer from 5 possible alternatives. i.e. Yes/No True false questions are not allowed. Note it is my intention to use these as part of the revision process. (3 marks)

WATS 7. Student number41

Fluid Mechanics and Thermodynamics.Weekly Assessed Tutorial Sheet 7.

Student Number 42

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Q1. A quantity of a fluid, of mass 0.67 kg, is contained in a vertical heat insulated cylinder, sealed at the top by a frictionless piston. The piston has a diameter of 0.88 m and its weight produces a pressure of 1.30 MN/m2 in the fluid. The fluid is stirred by a paddle for 35 minutes and during this time the period the paddle absorbs 1.030 kW of power and the piston rises a distance of 0.11 m. Calculate

i) The change in internal energy of the fluid during the process (kJ). [1 dp] (3 mark).ii) The change in the specific internal energy during the process (kJ/kg) [1 dp] (1 mark).

Q2. A compression ignition engine has as single cylinder with a bore of 24.30cm and a stroke of 41.30cm. The compression ratio is 14 to 1. At the start of the expansion stroke the gases in the clearance volume have a pressure of 7.20 Bars and it is assumed that the expansion is a reversible polytropic process to the law PV1.22 = C. Calculate

i) The pressure at the end of the stroke (Pa). [1 dp] (2 mark).ii) The work done (kJ). [4 dp] (1 mark).

Q3. Provide a multiple-choice type question that could be used to help revision. The question can be from any of the material covered in this subject. Naturally you should present the question and the possible responses together with the correct answer. Whilst there are many possible question types I am only asking for a multiple-choice type question that has one correct answer. You should also write the question such that you seek to get the correct answer from 5 possible alternatives. i.e. Yes/No True false questions are not allowed. Note it is my intention to use these as part of the revision process. (3 marks)

WATS 7. Student number42

Fluid Mechanics and Thermodynamics.Weekly Assessed Tutorial Sheet 7.

Student Number 43

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Q1. A quantity of a fluid, of mass 0.44 kg, is contained in a vertical heat insulated cylinder, sealed at the top by a frictionless piston. The piston has a diameter of 0.69 m and its weight produces a pressure of 0.70 MN/m2 in the fluid. The fluid is stirred by a paddle for 32 minutes and during this time the period the paddle absorbs 1.820 kW of power and the piston rises a distance of 0.20 m. Calculate

i) The change in internal energy of the fluid during the process (kJ). [1 dp] (3 mark).ii) The change in the specific internal energy during the process (kJ/kg) [1 dp] (1 mark).

Q2. A compression ignition engine has as single cylinder with a bore of 18.70cm and a stroke of 38.90cm. The compression ratio is 18 to 1. At the start of the expansion stroke the gases in the clearance volume have a pressure of 9.90 Bars and it is assumed that the expansion is a reversible polytropic process to the law PV1.23 = C. Calculate

i) The pressure at the end of the stroke (Pa). [1 dp] (2 mark).ii) The work done (kJ). [4 dp] (1 mark).

Q3. Provide a multiple-choice type question that could be used to help revision. The question can be from any of the material covered in this subject. Naturally you should present the question and the possible responses together with the correct answer. Whilst there are many possible question types I am only asking for a multiple-choice type question that has one correct answer. You should also write the question such that you seek to get the correct answer from 5 possible alternatives. i.e. Yes/No True false questions are not allowed. Note it is my intention to use these as part of the revision process. (3 marks)

WATS 7. Student number43

Fluid Mechanics and Thermodynamics.Weekly Assessed Tutorial Sheet 7.

Student Number 44

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Q1. A quantity of a fluid, of mass 0.35 kg, is contained in a vertical heat insulated cylinder, sealed at the top by a frictionless piston. The piston has a diameter of 0.43 m and its weight produces a pressure of 0.90 MN/m2 in the fluid. The fluid is stirred by a paddle for 51 minutes and during this time the period the paddle absorbs 1.930 kW of power and the piston rises a distance of 0.07 m. Calculate

i) The change in internal energy of the fluid during the process (kJ). [1 dp] (3 mark).ii) The change in the specific internal energy during the process (kJ/kg) [1 dp] (1 mark).

Q2. A compression ignition engine has as single cylinder with a bore of 16.80cm and a stroke of 41.20cm. The compression ratio is 16 to 1. At the start of the expansion stroke the gases in the clearance volume have a pressure of 7.50 Bars and it is assumed that the expansion is a reversible polytropic process to the law PV1.30 = C. Calculate

i) The pressure at the end of the stroke (Pa). [1 dp] (2 mark).ii) The work done (kJ). [4 dp] (1 mark).

Q3. Provide a multiple-choice type question that could be used to help revision. The question can be from any of the material covered in this subject. Naturally you should present the question and the possible responses together with the correct answer. Whilst there are many possible question types I am only asking for a multiple-choice type question that has one correct answer. You should also write the question such that you seek to get the correct answer from 5 possible alternatives. i.e. Yes/No True false questions are not allowed. Note it is my intention to use these as part of the revision process. (3 marks)

WATS 7. Student number44

Fluid Mechanics and Thermodynamics.Weekly Assessed Tutorial Sheet 7.

Student Number 45

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Q1. A quantity of a fluid, of mass 0.41 kg, is contained in a vertical heat insulated cylinder, sealed at the top by a frictionless piston. The piston has a diameter of 1.34 m and its weight produces a pressure of 0.30 MN/m2 in the fluid. The fluid is stirred by a paddle for 39 minutes and during this time the period the paddle absorbs 1.790 kW of power and the piston rises a distance of 0.47 m. Calculate

i) The change in internal energy of the fluid during the process (kJ). [1 dp] (3 mark).ii) The change in the specific internal energy during the process (kJ/kg) [1 dp] (1 mark).

Q2. A compression ignition engine has as single cylinder with a bore of 22.60cm and a stroke of 49.40cm. The compression ratio is 18 to 1. At the start of the expansion stroke the gases in the clearance volume have a pressure of 8.10 Bars and it is assumed that the expansion is a reversible polytropic process to the law PV1.16 = C. Calculate

i) The pressure at the end of the stroke (Pa). [1 dp] (2 mark).ii) The work done (kJ). [4 dp] (1 mark).

Q3. Provide a multiple-choice type question that could be used to help revision. The question can be from any of the material covered in this subject. Naturally you should present the question and the possible responses together with the correct answer. Whilst there are many possible question types I am only asking for a multiple-choice type question that has one correct answer. You should also write the question such that you seek to get the correct answer from 5 possible alternatives. i.e. Yes/No True false questions are not allowed. Note it is my intention to use these as part of the revision process. (3 marks)

WATS 7. Student number45

Fluid Mechanics and Thermodynamics.Weekly Assessed Tutorial Sheet 7.

Student Number 46

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Q1. A quantity of a fluid, of mass 0.38 kg, is contained in a vertical heat insulated cylinder, sealed at the top by a frictionless piston. The piston has a diameter of 0.56 m and its weight produces a pressure of 0.10 MN/m2 in the fluid. The fluid is stirred by a paddle for 50 minutes and during this time the period the paddle absorbs 0.830 kW of power and the piston rises a distance of 0.36 m. Calculate

i) The change in internal energy of the fluid during the process (kJ). [1 dp] (3 mark).ii) The change in the specific internal energy during the process (kJ/kg) [1 dp] (1 mark).

Q2. A compression ignition engine has as single cylinder with a bore of 23.00cm and a stroke of 26.60cm. The compression ratio is 15 to 1. At the start of the expansion stroke the gases in the clearance volume have a pressure of 2.10 Bars and it is assumed that the expansion is a reversible polytropic process to the law PV1.12 = C. Calculate

i) The pressure at the end of the stroke (Pa). [1 dp] (2 mark).ii) The work done (kJ). [4 dp] (1 mark).

Q3. Provide a multiple-choice type question that could be used to help revision. The question can be from any of the material covered in this subject. Naturally you should present the question and the possible responses together with the correct answer. Whilst there are many possible question types I am only asking for a multiple-choice type question that has one correct answer. You should also write the question such that you seek to get the correct answer from 5 possible alternatives. i.e. Yes/No True false questions are not allowed. Note it is my intention to use these as part of the revision process. (3 marks)

WATS 7. Student number46

Fluid Mechanics and Thermodynamics.Weekly Assessed Tutorial Sheet 7.

Student Number 47

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Q1. A quantity of a fluid, of mass 0.33 kg, is contained in a vertical heat insulated cylinder, sealed at the top by a frictionless piston. The piston has a diameter of 0.45 m and its weight produces a pressure of 1.40 MN/m2 in the fluid. The fluid is stirred by a paddle for 59 minutes and during this time the period the paddle absorbs 0.860 kW of power and the piston rises a distance of 0.23 m. Calculate

i) The change in internal energy of the fluid during the process (kJ). [1 dp] (3 mark).ii) The change in the specific internal energy during the process (kJ/kg) [1 dp] (1 mark).

Q2. A compression ignition engine has as single cylinder with a bore of 15.70cm and a stroke of 17.20cm. The compression ratio is 12 to 1. At the start of the expansion stroke the gases in the clearance volume have a pressure of 6.20 Bars and it is assumed that the expansion is a reversible polytropic process to the law PV1.36 = C. Calculate

i) The pressure at the end of the stroke (Pa). [1 dp] (2 mark).ii) The work done (kJ). [4 dp] (1 mark).

Q3. Provide a multiple-choice type question that could be used to help revision. The question can be from any of the material covered in this subject. Naturally you should present the question and the possible responses together with the correct answer. Whilst there are many possible question types I am only asking for a multiple-choice type question that has one correct answer. You should also write the question such that you seek to get the correct answer from 5 possible alternatives. i.e. Yes/No True false questions are not allowed. Note it is my intention to use these as part of the revision process. (3 marks)

WATS 7. Student number47

Fluid Mechanics and Thermodynamics.Weekly Assessed Tutorial Sheet 7.

Student Number 48

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Q1. A quantity of a fluid, of mass 0.05 kg, is contained in a vertical heat insulated cylinder, sealed at the top by a frictionless piston. The piston has a diameter of 1.14 m and its weight produces a pressure of 0.40 MN/m2 in the fluid. The fluid is stirred by a paddle for 44 minutes and during this time the period the paddle absorbs 1.190 kW of power and the piston rises a distance of 0.34 m. Calculate

i) The change in internal energy of the fluid during the process (kJ). [1 dp] (3 mark).ii) The change in the specific internal energy during the process (kJ/kg) [1 dp] (1 mark).

Q2. A compression ignition engine has as single cylinder with a bore of 23.20cm and a stroke of 31.80cm. The compression ratio is 17 to 1. At the start of the expansion stroke the gases in the clearance volume have a pressure of 9.50 Bars and it is assumed that the expansion is a reversible polytropic process to the law PV1.19 = C. Calculate

i) The pressure at the end of the stroke (Pa). [1 dp] (2 mark).ii) The work done (kJ). [4 dp] (1 mark).

Q3. Provide a multiple-choice type question that could be used to help revision. The question can be from any of the material covered in this subject. Naturally you should present the question and the possible responses together with the correct answer. Whilst there are many possible question types I am only asking for a multiple-choice type question that has one correct answer. You should also write the question such that you seek to get the correct answer from 5 possible alternatives. i.e. Yes/No True false questions are not allowed. Note it is my intention to use these as part of the revision process. (3 marks)

WATS 7. Student number48

Fluid Mechanics and Thermodynamics.Weekly Assessed Tutorial Sheet 7.

Student Number 49

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Q1. A quantity of a fluid, of mass 0.78 kg, is contained in a vertical heat insulated cylinder, sealed at the top by a frictionless piston. The piston has a diameter of 0.91 m and its weight produces a pressure of 0.40 MN/m2 in the fluid. The fluid is stirred by a paddle for 47 minutes and during this time the period the paddle absorbs 1.040 kW of power and the piston rises a distance of 0.49 m. Calculate

i) The change in internal energy of the fluid during the process (kJ). [1 dp] (3 mark).ii) The change in the specific internal energy during the process (kJ/kg) [1 dp] (1 mark).

Q2. A compression ignition engine has as single cylinder with a bore of 23.80cm and a stroke of 27.10cm. The compression ratio is 13 to 1. At the start of the expansion stroke the gases in the clearance volume have a pressure of 9.10 Bars and it is assumed that the expansion is a reversible polytropic process to the law PV1.11 = C. Calculate

i) The pressure at the end of the stroke (Pa). [1 dp] (2 mark).ii) The work done (kJ). [4 dp] (1 mark).

Q3. Provide a multiple-choice type question that could be used to help revision. The question can be from any of the material covered in this subject. Naturally you should present the question and the possible responses together with the correct answer. Whilst there are many possible question types I am only asking for a multiple-choice type question that has one correct answer. You should also write the question such that you seek to get the correct answer from 5 possible alternatives. i.e. Yes/No True false questions are not allowed. Note it is my intention to use these as part of the revision process. (3 marks)

WATS 7. Student number49

Fluid Mechanics and Thermodynamics.Weekly Assessed Tutorial Sheet 7.

Student Number 50

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Q1. A quantity of a fluid, of mass 0.32 kg, is contained in a vertical heat insulated cylinder, sealed at the top by a frictionless piston. The piston has a diameter of 0.77 m and its weight produces a pressure of 0.60 MN/m2 in the fluid. The fluid is stirred by a paddle for 59 minutes and during this time the period the paddle absorbs 1.380 kW of power and the piston rises a distance of 0.48 m. Calculate

i) The change in internal energy of the fluid during the process (kJ). [1 dp] (3 mark).ii) The change in the specific internal energy during the process (kJ/kg) [1 dp] (1 mark).

Q2. A compression ignition engine has as single cylinder with a bore of 19.00cm and a stroke of 38.30cm. The compression ratio is 12 to 1. At the start of the expansion stroke the gases in the clearance volume have a pressure of 5.40 Bars and it is assumed that the expansion is a reversible polytropic process to the law PV1.17 = C. Calculate

i) The pressure at the end of the stroke (Pa). [1 dp] (2 mark).ii) The work done (kJ). [4 dp] (1 mark).

Q3. Provide a multiple-choice type question that could be used to help revision. The question can be from any of the material covered in this subject. Naturally you should present the question and the possible responses together with the correct answer. Whilst there are many possible question types I am only asking for a multiple-choice type question that has one correct answer. You should also write the question such that you seek to get the correct answer from 5 possible alternatives. i.e. Yes/No True false questions are not allowed. Note it is my intention to use these as part of the revision process. (3 marks)

WATS 7. Student number50

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