Compressors - Interview Questions | Exam2Win

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41. Which is false statement about multistage compression .

A. Power consumption per unit of air delivered is low

B. Volumetric efficiency is high

C. It is best suited for compression ratios around 7:1

D. The moisture in air is condensed in the intercooler

E. Outlet temperature is reduced.

Explanation:

42. Ratio of indicated h.p. to shaft h.p. in known as

A. compressor efficiency

B. isothermal efficiency

C. volumetric efficiency

D. mechanical efficiency

E. adiabatic efficiency.

Explanation:

43. Aeroplanes employ following type of compressor

A. radial flow

B. axial flow

C. centrifugal

D. combination of above

E. none of the above.

Explanation:

44. In multistage compressor, the isothermal compression is achieved by

A. employing intercooler

B. by constantly cooling the cylinder

C. by running compressor at very slow speed

D. by insulating the cylinder

E. none of the above.

Explanation:

45. Which is false statement about air receivers

A. These are used to dampen pulsations ,

B. These act as reservoir to- take care of sudden demands

C. These increase compressor efficiency

D. These knock out some oil and moisture

E. These reduce frequent on/off operation of compressors.

Explanation: