Compressors - Interview Questions | Exam2Win

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26. The ratio of work done per cycle to the swept volume in case of compressor is called

A. compression index

B. compression ratio

C. compressor efficiency

D. mean effective pressure

E. compressor effectiveness.

Explanation:

27. Inter cooling in compressors

A. cools the delivered air

B. results in saving of power in compressing a given volume to given pressure

C. is the standard practice for big compressors

D. enables compression in two stages

E. prevents compressor jacket running very hot.

Explanation:

28. An ideal air compressor cycle without clearance on p-v diagram can be represented by following processes

A. one adiabatic, two isobaric, and one constant volume

B. two adiabatic and two isobaric

C. two adiabatic, one isobaric and one constant volume

D. one adiabatic, one isobaric and two constant volume

E. two isobaric, two adiabatic and one constant volume.

Explanation:

29. Isothermal compression efficiency, even when running at high speed, can be approached by using

A. multi-stage compression

B. cold water spray

C. both (a) and (b) above

D. fully insulating the cylinder

E. high stroke.

Explanation:

30. Isothermal compression efficiency can be attained by running the compressor

A. at very high speed

B. at very slow speed

C. at average speed

D. at zero speed

E. isothermally.

Explanation: