Mechanical Engineering - Compressors, Gas Dynamics and Gas Turbines

Exercise :: Compressors, Gas Dynamics and Gas Turbines - Section 3

1. 

A compressor at high altitudes will require __________ power.

A. same
B. less
C. more

Answer: Option B

Explanation:

No answer description available for this question. Let us discuss.

2. 

The mean effective pressure of the compressor is the

A. actual volume of the air delivered by the compressor when reduced to normal temperature and pressure conditions
B. volume of air delivered by the compressor
C. volume of air sucked by the compressor during its suction stroke
D. none of the above

Answer: Option D

Explanation:

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3. 

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

A. pressure drop across the valves
B. superheating in compressor
C. clearance volume and leakages
D. all of these

Answer: Option D

Explanation:

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4. 

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

A. Yes
B. No

Answer: Option A

Explanation:

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5. 

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

A. injecting water into the compressor
B. burning fuel after gas turbine
C. injecting ammonia into the combustion chamber
D. all of the above

Answer: Option D

Explanation:

No answer description available for this question. Let us discuss.

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