Compressors - Interview Questions | Exam2Win

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36. The compressor capacity with decrease in suction temperature

A. increases

B. decreases

C. remains unaffected

D. may increase or decrease depending on compressor capacity

E. increases upto certain limit and then decreases.

Explanation:

37. Ratio of compression is the ratio of

A. gauge discharge pressure to the gauge intake pressure

B. absolute discharge pressure to the ab-solute intake pressure

C. pressures at discharge and suction cor-responding to same temperature

D. stroke volume and clearance volume

E. none of the above.

Explanation:

38. Volumetric efficiency is

A. the ratio of stroke volume to clearance volume

B. the ratio of the air actually delivered to the amount of piston displacement

C. reciprocal of compression ratio

D. index of compressor performance

E. proportional to compression ratio.

Explanation:

39. To avoid moisture troubles, the branch connections from compressed air lines should be taken from

A. top side of main

B. bottom side of main

C. left side of main

D. right side of main

E. any location.

Explanation:

40. After-cooler is used to

A. cool the air

B. decrease the delivery temperature for ease in handling

C. cause moisture and oil vapour to drop out

D. reduce volume

E. increase pressure.

Explanation: