elgi equipments

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 caviation



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)