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  • |''|'||'|''|''||'|'|

    Subject Code: R13205/R13 I B.Tech II Semester Supplementary Examinations Dec./Jan. 2015/2016

    COMPUTER PROGRAMMING (Common to ECE, EEE, EIE, Bio-Tech, E Com E, Agri E)

    Time: 3 hours Max. Marks: 70 Question Paper Consists of Part-A and Part-B

    Answering the question in Part-A is Compulsory,

    Three Questions should be answered from Part-B

    ****

    PART-A

    1. (a) C is a structured programming language? Justify.

    (b) Differentiate between for and while statements.

    (c) Explain about the parameter passing using copy by address.

    (d) Explain about the *, ** and & keywords.

    (e) Explain about the masks.

    (f) Differentiate between scanf and fscanf functions with examples.

    [3+4+3+4+4+4]

    PART- B

    2. (a) Explain about different computer languages.

    (b) Write a program to calculate the series: 1+ +1/3+1/4+1/5..+1/n

    [8+8]

    3. (a) Explain about the iterative statements with examples.

    (b) Write a program to find the factorial of a given number.

    [8+8]

    4. Define function? How to declare function? Create functions with and without inputs and

    outputs.

    [16]

    5. (a) What is pointer? How to initialize pointers? Give examples.

    (b) Write a program to swap two numbers using pointers.

    [8+8]

    6. (a) Differentiate between structure and union?

    (b) Write a program to calculate the grade and total marks of the given student using

    structures.

    [8+8]

    7. (a) What are different types of files? Explain.

    (b) Write a program to display contents of the file on screen.

    [8+8]

    ****

    Set No - 1

  • |''|'||'|''|''||'|'|

    Subject Code: R13212/R13 I B.Tech II Semester Supplementary Examinations Dec./Jan. 2015/2016

    ELECTRICAL CIRCUITS ANALYSIS-I (EEE)

    Time: 3 hours Max. Marks: 70 Question Paper Consists of Part-A and Part-B

    Answering the question in Part-A is Compulsory,

    Three Questions should be answered from Part-B

    *****

    PART-A

    1. (a) State Kirchhoffs laws. What are its limitations?

    (b) Define phase angle and phase difference.

    (c) A series RLC circuit has R=80 ohms, L=100 H, C=0.3 F. Find the resonant frequency

    and current at resonance if the supply voltage is 10 V.

    (d) State Faradays laws of electromagnetic induction.

    (e) Write the properties of dual networks.

    (f) State compensation theorem.

    [4+4+4+4+3+3]

    PART-B

    2. (a) Explain the star-to-delta and delta-to-star transformation for a resistive network.

    (b) Find a single source equivalent at the terminals of a circuit shown in fig.1

    [8+8]

    3. (a) Two coils A and B are connected in series across a 240 V, 50 Hz supply. The resistance

    of coil A is 5 ohms and inductance of coil B is 0.015 H. If input from the supply is 3 kW

    and 2 kVAr, find the resistance of coil B and inductance of coil A. Also calculate voltage

    across each coil.

    (b) A resistance R, an inductance L=0.01 H, and a capacitance C are connected in series.

    When a voltage )10-cos(3000t 4000

    =v volts is applied to the series combination, a

    current flowing is )55-cos(3000t 210 0=i amperes. Find R and C.

    [8+8]

    4. (a) Show that resonant frequency n of RLC series circuit is geometric mean of lower and

    upper half-frequencies 1 and 2.

    Page 1 of 2

    2 10

    20 V

    Fig.1

    2

    10 V

    1 A 5 2 A

    A

    B

    Set No - 1

  • |''|'||'|''|''||'|'|

    Subject Code: R13212/R13

    4. (b) Find the value of L so that the circuit shown in fig.2 resonates.

    Fig.2

    [8+8]

    5. (a) Explain the dot convention in coupled circuits.

    (b) A magnetic circuit consists of an iron ring of mean circumference 80 cm with cross-

    sectional area of 12 cm2 throughout. A current of 2A in the magnetizing coil of 200 turns

    produce a total flux of 1.2 m Wb in the iron. Calculate: (i) the flux density in the iron (ii)

    the absolute and relative permeability of iron (iii) the reluctance of the circuit.

    [7+9]

    6. (a) Explain the procedure to form the tie-set matrix of the given network. Discuss the

    advantages of tie-set matrix.

    (b) For the network shown in Fig.3, obtain the fundamental cut-set matrix.

    [8+8]

    7. (a) State and explain the Maximum power transfer theorem.

    (b) Find VL in the circuit shown in fig.4, using superposition theorem.

    [8+8]

    *****

    Page 2 of 2

    E, 60 Hz

    81 -j43.2

    15 L

    ~

    Fig.3

    2 1 4

    3

    5 A

    Fig.4

    7 A 4V

    +

    -

    VL

    5

    8 +

    -

    4

    3 A

    3

    Set No - 1

  • |''|'||'|''|''||'|'|

    Subject Code: R13204/R13 I B.Tech II Semester Supplementary Examinations Dec./Jan. 2015/2016

    ENGINEERING CHEMISTRY (Common to ECE, EEE, EIE, Bio-Tech, E Com E, Agri E)

    Time: 3 hours Max. Marks: 70 Question Paper Consists of Part-A and Part-B

    Answering the question in Part-A is Compulsory,

    Three Questions should be answered from Part-B

    *****

    PART-A

    1. (a) A coal sample gave the following analysis C = 66.2%, H = 4.2%, O = 6.1%, N = 1.4%,

    S = 2.9% and remaining ash. If one Kg of coal is burnt with 25 % excess air, determine

    the quantity of products of combustion.

    (b) Write short notes on: (i) Biodegradable polymers (ii) Break point chlorination

    (iii) Electroless plating (iv) Electrode potential

    (v) Stereo-specific polymers

    [7+(3+3+3+3+3)]

    PART-B

    2. (a) What are boiler troubles? Explain the formation and disadvantages of scale and sludge

    particles in boilers.

    (b) Write notes on preparation and applications of phenol formaldehyde resins.

    (c) Explain the refining of petroleum.

    [6+5+5]

    3. (a) What is meant by reference electrode? Explain principle and working of primary

    reference electrode.

    (b) Write notes on differential aeration and pitting corrosion.

    (c) Write notes on green house effect.

    [6+5+5]

    4. (a) Explain theory of dry corrosion and nature of oxide film formed on the metal surface.

    (b) Explain the functions of lime and soda in removal of permanent and temporary hardness

    of water sample, give chemical reactions.

    (c) Explain the anionic addition polymerization with example.

    [6+5+5]

    5. (a) Write notes on preparation and uses of BUNA-S and Thiokol.

    (b) Explain the conductance behavior of weak electrolyte and strong electrolyte.

    (c) Write any one method for synthesis of CNTs

    [6+5+5]

    6. (a) What is meant by ultimate analysis. Explain the determination of carbon and nitrogen

    content in a coal sample.

    (b) Describe a method for estimation of hardness of water.

    (c) Explain the working of Ni-Cd cell with suitable reactions.

    [6+5+5]

    7. (a) What is setting and hardening of cement. Explain with proper chemical reactions.

    (b) Define Calorific value of a fuel. Write notes on HCV and LCV.

    (c) What is meant by organic surface coating? Write notes on constituents of paints.

    [6+5+5]

    ****

    Set No - 1

  • |''|'||'|''|''||'|'|

    Subject Code: R13209/R13 I B.Tech II Semester Supplementary Examinations Dec./Jan. 2015/2016

    ENGINEERING DRAWING (Common to CE & ME)

    Time: 3 hours Max. Marks: 70 Question Paper Consists of Part-A and Part-B

    Answering the question in Part-A is Compulsory,

    Three Questions should be answered from Part-B

    *****

    PART-A

    1. (a) A regular pentagonal lamina of 30mm sides has one edge in HP and inclined at an angle

    of 300 to VP. Draw its projections when its surface is inclined at 45

    0 to HP.

    (b) Draw the isometric view of Fig.1

    Fig.1

    [10+12]

    PART-B

    2. (a) Construct a diagonal scale of RF=1/32 showing yards, feet and inches and to measure up

    to 4 yards.

    (b) A plot of ground is in the shape of a rectangle 110m x 50m. Inscribe an elliptical lawn in

    it. Take a suitable scale.

    [8+8]

    3. (a) A 100mm long line is parallel to and 40mm above the HP. Its two ends are 25mm and

    50mm in front of the VP respectively. Draw its projections and find its inclinations with

    the VP.

    Page 1 of 2

    Set No - 1

  • |''|'||'|''|''||'|'|

    Subject Code: R13209/R13

    3. (b) A point A is situated in the first quadrant. Its shortes

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