Mechanical Engineering - Compressors, Gas Dynamics and Gas Turbines

Exercise :: Compressors, Gas Dynamics and Gas Turbines - Section 4

1. 

The volume of air sucked by the compressor during its suction stroke is called

A. free air delivery
B. compressor capacity
C. swept volume
D. none of these

Answer: Option C

Explanation:

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2. 

For perfect intercooling in a two stage compressor,

A.
B.
C. p1 = p3
D. p1 = p2 p3

Answer: Option A

Explanation:

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3. 

The efficiency of the vane blower is (where W1 = Workdone due to compression, and W2 = Workdone due to back flow)

A.
B.
C.
D.

Answer: Option B

Explanation:

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4. 

The volumetric efficiency of a compressor

A. constant with decrease in compression ratio
B. decreases with decrease in compression ratio
C. increases with increase in compression ratio
D. decreases with increase in compression ratio

Answer: Option D

Explanation:

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5. 

Reheating in a multi-stage expansion gas turbine __________ compressor work.

A. has no effect on
B. decreases
C. increases

Answer: Option B

Explanation:

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