Mechanical Engineering - Compressors, Gas Dynamics and Gas Turbines

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

11. 

Which of the following statement is wrong?

A. In a two stage reciprocating air compressor with complete intercooling, maximum work is saved.
B. The minimum work required for a two stage reciprocating air compressor is double the work required for each stage.
C. The ratio of the volume of free air delivery per stroke to the swept volume of the piston is called volumetric efficiency.
D. none of the above

Answer: Option D

Explanation:

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12. 

In a single acting reciprocating compressor, the suction, compression and delivery of air takes place in __________ of the piston.

A. one stroke
B. two strokes
C. three strokes
D. four strokes

Answer: Option B

Explanation:

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13. 

The increase in pressure in a vane blower takes place first due to compression and then due to back flow of air.

A. Correct
B. Incorrect

Answer: Option A

Explanation:

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14. 

The maximum delivery pressure in a rotary air compressor is

A. 10 bar
B. 20 bar
C. 30 bar
D. 50 bar

Answer: Option A

Explanation:

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15. 

The capacity of a compressor is expressed in

A. kg/m2
B. kg/m3
C. m3/min
D. m3/kg

Answer: Option C

Explanation:

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