Mechanical Engineering - Compressors, Gas Dynamics and Gas Turbines

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

26. 

The gas in cooling chamber of a closed cycle gas turbine is cooled at

A. constant volume
B. constant temperature
C. constant pressure
D. none of these

Answer: Option C

Explanation:

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27. 

A 3 m3/min compressor means that it

A. compresses 3 m3/min of standard air
B. compresses 3 m3/ min of free air
C. delivers 3 m3/ min of compressed air
D. delivers 3 m3/ min of compressed air at delivery pressure

Answer: Option B

Explanation:

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28. 

The compression ratio for the compressor is always __________ unity.

A. equal to
B. less than
C. more than

Answer: Option C

Explanation:

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29. 

The assumption made in two stage compression with intercooler is that

A. there is no pressure drop in the intercooler
B. the compression in both the cylinders is polytropic
C. the suction and delivery of air takes place at constant pressure
D. all of the above

Answer: Option D

Explanation:

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30. 

With the decrease in compression ratio, the volumetric efficiency

A. does not change
B. increases
C. decreases

Answer: Option B

Explanation:

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