RGPV Basic Mechanical Engg. - May 2012 Exam Question Paper

RGPV First Year Engineering (Set A) (Semester 2)
Basic Mechanical Engg.
May 2012

Total marks: --
Total time: --

INSTRUCTIONS
(1) Assume appropriate data and state your reasons
(2) Marks are given to the right of every question
(3) Draw neat diagrams wherever necessary

Answer any one question from Q1 & Q2

1 (a) Define the following mechanical properties of engineering material:
(i) Ductility
(ii) Hardness
(iii) Toughness
(iv) Machinability

7 M

1 (b) Discuss the stress-strain curve curve for a ductile material.

7 M

2 (a) What is Alloy Steel? Name two types of alloy steel giving their composition and uses.

7 M

2 (b) Define hardness and explain the testing procedure for determine hardness of engineering material.

7 M

Answer any one question from Q3 & Q4

3 (b) Explain the construction and uses of the following measuring instruments:
(i) Dial guage
(ii) Micrometer

14 M

4 (a) Describe the measurement of flow rate of a fluid flowing through a circular pipe.

7 M

4 (b) Name and explain five operations which can be performed on a lathe machine.

7 M

Answer any one question from Q5 & Q6

5 (a) State Newton's law of viscosity. What is the effect of temperature on viscosity of water and gas?

7 M

5 (b) What is fluid coupling? Explain its working principle.

7 M

6 (a) Differentiate between absolute pressure and guage pressure, how can we measure pressure exerted by fluid?

7 M

6 (b) Differentiate between the following:
(i) Laminar and turbulent flow
(ii) Turbine and compressor

7 M

Answer any one question from Q7 & Q8

7 (a) State and explain First Law of Thermodynamics.

7 M

7 (b) Explain the working of a simple vapour compression refrigeration cycle.

7 M

8 (a) Define the following terms:
(i) Sensible heat of water
(ii) Latent heat of steam
(iii) Dryness fraction of steam
(iv) Saturation temperature of steam

7 M

8 (b) Explain the working of a water tube boiler with me help of a neat sketch.

7 M

Answer any one question from Q9 & Q10

9 (a) Explain the working of a double acting steam engine with the help of a neat diagram.

7 M

9 (b) Differentiate between petrol and diesel engine.

7 M

10 (a) A reversible heat engine delivers 0.6 kW power and rejects heat energy to a reservoir at 300 K at the rate of 24 kJ/min. Determine the cycle efficiency and temperature of the thermal reservoir supplying heat to the engine.

7 M

10 (b) Explain the working of a 4-stroke petrol engine.

7 M

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