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ME Set-3
Pressure Vessels
72

Pressure Vessels and Engines MCQ with Answers

72) The criterion of the thermodynamic efficiency for rotary compressor is

isentropic compression

isothermal compression

polytropic compression

any one of the above

Answer is:

isentropic compression

Pressure Vessels and Engines MCQ with Answers

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Related Pressure Vessels and Engines MCQ with Answers

73) For supplying intermittent small quantity of air at high pressure, following compressor is best suited

centrifugal

reciprocating

axial

screw

Answer is:

reciprocating

74) For minimum work in multistage compression, assuming same index of compression in all stages

work done in first stage should be more

work done in subsequent stages should increase

work done in subsequent stages should decrease

work done in all stages should be equal

Answer is:

work done in all stages should be equal

75) For a two stage compressor* if index of compression for higher stage is greater than index of compression for lower stage, then the optimum pressure as compared to ideal case will

increase

decrease

remain unaffected

other factors control it

Answer is:

increase

76) Diffuser in a compressor is used to

increase velocity

make the flow stream-line

convert pressure energy into kinetic energy

convert kinetic energy into pressure energy

Answer is:

convert kinetic energy into pressure energy

Pressure Vessels and Engines MCQ with Answers

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