ELGI Placement Paper Technical - Other -1 Jan 1900
ELGI EQUIPMENTSSET I:1. The pressure p in terms of its mean kinetic energy/unit volume E isa .E/3 b.E/2 c.3E/4 d.2E/3 e.5E/42. Convert volumetric to gravitational, relative volume of each constituent of flue gasa. %mw b. xmv c. me d. xsw e. %sw3. Which is correct for reversible polytrophic process?a. temperature constant b. density constant c. volume constantd. entropy constant e. same heat transfer4. if a gas or vapour allowed to expand through a minute holea. free expansion b. hyperbolic c. adiabatic expansiond. parabolic e. throttling5. Minimum work of compressor is possible, when the adiabatic index isa.0.75 b.1 c.1.27 d.1.35 e.26. Under ideal condition, isothermal, isochoric, adiabatic and isobaric area. static b. dynamic c. quan-static d. stable e. thermodynamic7. If a heat engine attains 100% efficiency, then it isa. zeroth law b. I law c. II law d. no e. all8. If Q1 is the heat in source, Q2 is the cold sink for heat pump then COPa. Q1 / (Q1- Q2) b. Q2 / (Q1- Q2) c. (Q1- Q2) / Q19. The output of diesel engine is increased ifa. more fuel b. flywheel size c. incoming aird. scavenging e. supercharging10. Accumulation of carbon in the cylinder increases whena. decrease in volume b. volumetric efficiency c. ignition timed. effective compression ratio e. travel time11. The most popular firing sequencea.1234 b.1324 c.1423 d.1243 e.134212. for same power, same speed, flywheel of petrol and diesel engine area. smaller b. greater c. equal d. none13. If petrol is used in diesel engine, thena. higher knocking b. black smoke c. lot of fuel d. improper combustion14. Ans .d) mechanical efficiency15. Reciprocating compressor is used fora. large quantity of air at high pressure b. large quantity of air at low pressurec. low quantity of air at low pressure d . low quantity of air at high pressure16. Thermal diffusitya. Dimensionless d. used in radiation process17. Critical pressure18. Cryogenics Ans - Option with engineering19. Lean relation fora. specific gravity b. dynamic viscosity20. Centre of pressure = centre of gravity when21. Flow of particles in definite path without change in the path of the particlea. one dimensional b. c. turbulent d. steady state22. Pressure coefficient is given by23. Vortex on whirlpool is due toa. cavitation b. wake c. drag24. Rotometer is used25. Axial flow pump is used26. To avoid caviation27. Fan laws28. Rupture (what it is)29. A belt drive, where pulley dia is double, and then it key length must bea. doubled b. same c. increase the critical length d.30. Surface contact in motion is calleda. roll pair b. surface pair c. lower pair d. slide31. For fluctuating load----------- is useda. ball bearing b. roll bearing c. thrust bearing d. sleeve bearing32. Transmit power33. D1 and D2 are pulley dia, and then the speed is given by34. To keep the noise to minimum35. In pinion and gear design, the design must be made bya. gear b. pinion c. both36. The plate is severely deformed at a side then it grains becomesa. ductile b. malleable c.37. What is recrystallation temperature?38. What is austempering?39. Acetylene is staid on --------- forma. liquid b. solid c. compressed40. tool life is concentrated ona. cutting speed b. material c. feed or depth41. Reamer is used fora. b. to correct the size and finish42. Statistical quality control charts usesa. statistics b. probability c. all the above.SET II:compressor performance curvelaser machining a) hard matl b) soft matl )dynamic viscosityshock absorber purposesp. Heat ratiocetane number whycantilever ,simple supported beam (SFD,BMD)intercooler whymultistage pr. Problemsrain water spherical whysuperchargingrankine cycle howmany processvapour comp ref high head pr same even if comp is switched off whyadiabatic saturation a)dbt same b)wbt same3 phase induction motor direction to be reversed howratio of (not clear) temp in a gas comp adiabatic to isthermal a)>1 b).1 c)=1know about isothermal, polytropic, adiabaticstructure in engg. Mechequilibrium conditionscircle eqn 1d,2d,3d(dimensions)ax2+bx+c=0 produt of roots2x+y=4 slopeslip gages in used only for less time and then kept separatelyfuel economy factorpr. Gage(manometers)
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