question bank metrology

7/30/2019 Question Bank Metrology

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LOYOLA ICAM COLLEGE OF ENGINEERING AND TECHNOLOGY

QUESTION BANK

ME 2304 ENGINEERING METROLOGY AND MEASUREMENT

Department of Mechanical Engineering

III Year, V Sem

UNIT I

PART A

1. What is metrology?

2. What is the general concept of measurement?

3. Give atleast two significances of measurement.

4. What are the three elements an engineer should exercise to establish the validity of a

design? Give examples for each of the elements.

5. What is a measurand?

6. Define the standard unit of luminous intensity.

7. What is sensitivity? Give an example for highly sensitive instrument.

8. Differentiate between precision and accuracy. Give symbolic interpretation of precision

and accuracy. Give one example for a highly precise and accurate instrument.

9. Differentiate between repeatability and reproducibility.

10. What is calibration? Why should an instrument be calibrated?

11. What is an error? Give at least four types of systematic errors.

12. What is calibration error?

13.What is random error? How do you analyse and predict the occurrence of a random error?

14.Define 1.Correction 2.Correction factor.

15.What is maximum metal condition?

PART B

1.i)Elaborate the general concept of measurement with examples.(8)

ii)What are the significances of measurement? Give examples. (8)

2.Give detailed explanation about Generalised Measurement System (16)


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3.Elaborate the stages of Generalised Measurement System with a suitable measurement

system. (16)

4.Elaborate the various units and standards. What are the various parameters you take into

account while designing a measurement system. Explain the importance of these parameters.

(16)

5.Explain the following terms with suitable examples. i)Sensitivity ii).Stability iii)Range

iv)Accuracy and Precision. (4x4=16)

6.Explain systematic and Random errors.(16)

7.Give detailed explanation on correction and calibration. (16)

8.Elaborate dimensional and geometric tolerancing. (16)

9.i)What is tolerancing? Define the following terms 1.Positional tolerance 2.Maximum Metal

Condition 3. Interchangeability.(8)

ii)Draw and explain the various symbols used to correspond the tolerance information. (8)

10.What is interchangeability? Explain the importance of precise tolerance to establish

interchangeability. (16)

UNIT II

PART A

1.Define Metrology.

2.What is Linear Measurement?

3.Give examples for linear measurement instruments?

4.What are the differences between the various types of vernier calipers?

5.What is the principle behind the vernier caliper? Write the formula used.

6.List the parts in a micrometer.

7.How do you use a micrometer? What is the way to enhance the accuracy of micrometer.

8.Give atleast three applications of slip gauges.

9.Write atleast two significances of Tool Makers Microscope.

10.What is interferometry?

11.What is the principle behind measurementby interferometry?

12. Interferometry is the ultimate measurement and calibration technique. Justify.

13.List down the various types of comparators.

14.What is the working principle of pneumatic comparator?

15.What is the working principle of electrical comparator?


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PART B

1.What is linear measurement. Explain in detail the working principle of two linear

measurement devices. (16)

2.Explain the following vernier instruments with diagrams

1.Vernier Caliper(4)

2. Vernier Height Gauge (4)

3. Gear tooth Vernier calliper (8)

3. What is a micrometer? Explain i) the functions of various parts of a micrometer ii) Explain

the procedure to operate and read the micrometer. iii) What additional feature would you

incorporate in a micrometer to enhance its accuracy? (16)

4. Explain in detail the working principle of Tool Makers Microscope. (16)

5. i) What is interferometry? ii) Explain in detail how the principle of interferometry is used

to take precise measurements. iii) Why interferometry is regarded as the ultimate technique in

calibration and measurement. (16)

6. Explain how interferometry is used to check the accuracy of a standard? (16)

7. Explain in detail the working principle of i) Mechanical comparators ii) Pneumatic

comparators (16)

8. Explain in detail the working principle of i) Pneumatic comparators ii) Electrical

comparators. (16)

9. Expalin any two angle measurement devices in detail. (16)

10. Explain in detail

i) how the combination of sine bar and slip gauges is used to make angular measurements.

(8)

ii) the principle and applications of a sine center. (8)

question bank metrology

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