Compressors Gas dynamics and Gas Turbines MCQ with Answers

101) The reason for volumetric efficiency of reciprocating compressor being less than 100 percent is

Answer is:

all of these

Explanation:

The reason for volumetric efficiency of reciprocating compressor being less than 100 percent is
* pressure drop across the valves
* superheating in compressor
* clearance volume and leakages

102) For minimum work in multi-stage compression, the workdone on all stages should be equal.

Answer is:

Yes

103) The thrust of a jet propulsion power unit can be increased by

Answer is:

all of the above

Explanation:

The thrust of a jet propulsion power unit can be increased by
* injecting water into the compressor
* burning fuel after gas turbine
* injecting ammonia into the combustion chamber

104) Which of the following statement is correct?

The reciprocating compressors are best suited for high pressure and low volume capacity

The effect of clearance volume on power consumption is negligible for the same volume of discharge

both The reciprocating compressors are best suited for high pressure and low volume capacity and The effect of clearance volume on power consumption is negligible for the same volume of discharge

none of these

Answer is:

both The reciprocating compressors are best suited for high pressure and low volume capacity and The effect of clearance volume on power consumption is negligible for the same volume of discharge

105) Slip factor in a centrifugal compressor indicates the amount of air leaked from the storage vessel.

Answer is:

101) The reason for volumetric efficiency of reciprocating compressor being less than 100 percent is

all of these

102) For minimum work in multi-stage compression, the workdone on all stages should be equal.

Yes

103) The thrust of a jet propulsion power unit can be increased by

all of the above

104) Which of the following statement is correct?

both The reciprocating compressors are best suited for high pressure and low volume capacity and The effect of clearance volume on power consumption is negligible for the same volume of discharge

105) Slip factor in a centrifugal compressor indicates the amount of air leaked from the storage vessel.

No