Mechanical Engineering - Compressors, Gas Dynamics and Gas Turbines

Exercise :: Compressors, Gas Dynamics and Gas Turbines - Section 1

6. 

The rotary compressors are suitable for large discharge of air at low pressure.

A. True
B. False

Answer: Option A

Explanation:

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7. 

The stagnation pressure rise in a centrifugal compressor takes place

A. in the diffuser only
B. in the impeller only
C. in the diffuser and impeller
D. in the inlet guide vanes only

Answer: Option C

Explanation:

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8. 

The total heat rejected in a reciprocating air compressor is equal to the sum of the heat rejected during polytropic compression per kg of air and heat rejected in the intercooler per kg of air.

A. True
B. False

Answer: Option A

Explanation:

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9. 

In a jet propulsion

A. the propulsive matter is ejected from within the propelled body
B. the propulsive matter is caused to flow around the propelled body
C. its functioning does not depend upon presence of air
D. none of the above

Answer: Option B

Explanation:

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10. 

An open cycle gas turbine works on the same cycle as that of a closed cycle gas turbine.

A. Yes
B. No

Answer: Option A

Explanation:

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