SET I:


1. The pressure p in terms of its mean kinetic energy/unit volume E is

a .E/3 b.E/2 c.3E/4 d.2E/3 e.5E/4


2. Convert volumetric to gravitational, relative volume of each constituent of flue gas

a. %mw b. xmv c. me d. xsw e. %sw


3. Which is correct for reversible polytrophic process?

a. temperature constant b. density constant c. volume constant

d. entropy constant e. same heat transfer


4. if a gas or vapour allowed to expand through a minute hole

a. free expansion b. hyperbolic c. adiabatic expansion

d. parabolic e. throttling


5. Minimum work of compressor is possible, when the adiabatic index is

a.0.75 b.1 c.1.27 d.1.35 e.2


6. Under ideal condition, isothermal, isochoric, adiabatic and isobaric are

a. static b. dynamic c. quan-static d. stable e. thermodynamic


7. If a heat engine attains 100% efficiency, then it is

a. zeroth law b. I law c. II law d. no e. all


8. If Q1 is the heat in source, Q2 is the cold sink for heat pump then COP

a. Q1 / (Q1- Q2) b. Q2 / (Q1- Q2) c. (Q1- Q2) / Q1


9. The output of diesel engine is increased if

a. more fuel b. flywheel size c. incoming air

d. scavenging e. supercharging


10. Accumulation of carbon in the cylinder increases when

a. decrease in volume b. volumetric efficiency c. ignition time

d. effective compression ratio e. travel time


11. The most popular firing sequence

a.1234 b.1324 c.1423 d.1243 e.1342


12. for same power, same speed, flywheel of petrol and diesel engine are

a. smaller b. greater c. equal d. none


13. If petrol is used in diesel engine, then

a. higher knocking b. black smoke c. lot of fuel d. improper combustion


14. Ans .d) mechanical efficiency


15. Reciprocating compressor is used for

a. large quantity of air at high pressure b. large quantity of air at low pressure

c. low quantity of air at low pressure d . low quantity of air at high pressure


16. Thermal diffusity

a. Dimensionless d. used in radiation process

17. Critical pressure

18. Cryogenics Ans - Option with engineering


19. Lean relation for

a. specific gravity b. dynamic viscosity


20. Centre of pressure = centre of gravity when


21. Flow of particles in definite path without change in the path of the particle

a. one dimensional b. c. turbulent d. steady state


22. Pressure coefficient is given by


23. Vortex on whirlpool is due to

a. cavitation b. wake c. drag


24. Rotometer is used


25. Axial flow pump is used


26. To avoid cavitations


27. Fan laws


28. Rupture (what it is)


29. A belt drive, where pulley dia is double, and then it key length must be

a. doubled b. same c. increase the critical length d.

30. Surface contact in motion is called

a. roll pair b. surface pair c. lower pair d. slide


31. For fluctuating load----------- is used

a. ball bearing b. roll bearing c. thrust bearing d. sleeve bearing

32. Transmit power

33. D1 and D2 are pulley dia, and then the speed is given by


34. To keep the noise to minimum


35. In pinion and gear design, the design must be made by

a. gear b. pinion c. both


36. The plate is severely deformed at a side then it grains becomes

a. ductile b. malleable c.


37. What is recrystallation temperature?


38. What is austempering?


39. Acetylene is staid on --------- form

a. liquid b. solid c. compressed


40. tool life is concentrated on

a. cutting speed b. material c. feed or depth


41. Reamer is used for

a. b. to correct the size and finish


42. Statistical quality control charts uses

a. statistics b. probability c. all the above.


SET II:


1. compressor performance curve

2. laser machining a) hard matl b) soft matl )

3. dynamic viscosity

4. shock absorber purpose

5. sp. Heat rati

6. cetane number why

7. cantilever ,simple supported beam (SFD,BMD)

8. intercooler why

9. multistage pr. Problems

10. rain water spherical why

11. supercharging

12. rankine cycle howmany process

13. vapour comp ref high head pr same even if comp is switched off why

14. adiabatic saturation a)dbt same b)wbt same

15. 3 phase induction motor direction to be reversed how

16. ratio of (not clear) temp in a gas comp adiabatic to isthermal a)>1 b).1 c)=1

17. know about isothermal, polytropic, adiabatic

18. structure in engg. Mech

19. equilibrium conditions

20. circle eqn 1d,2d,3d(dimensions)

21. ax2+bx+c=0 produt of roots

22. 2x+y=4 slope

23. slip gages in used only for less time and then kept separately

24. fuel economy factor

25. pr. Gage(manometers)