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Mechanical Engineering - Compressors, Gas Dynamics and Gas Turbines

Exercise : Compressors, Gas Dynamics and Gas Turbines - Section 1
21.
Which of the following statement is correct?
The ratio of the discharge pressure to the inlet pressure of air is called compressor efficiency.
The compression ratio for the compressor is always greater than unity.
The compressor capacity is the ratio of workdone per cycle to the stroke volume.
During isothermal compression of air, the workdone in a compressor is maximum.
Answer: Option
Explanation:
No answer description is available. Let's discuss.
22.
In the aircraft propellers
the propulsive matter is ejected from within the propelled body
the propulsive matter is caused to flow around the propelled body
its functioning does not depend upon the presence of air
none of the above
Answer: Option
Explanation:
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23.
The type of rotary compressor used in gas turbines, is of
centrifugal type
axial flow type
radial flow type
none of these
Answer: Option
Explanation:
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24.
The volume of air delivered by the compressor is called
free air delivery
compressor capacity
swept volume
none of these
Answer: Option
Explanation:
No answer description is available. Let's discuss.
25.
The efficiency of a jet engine is higher at
low speeds
high speeds
low altitudes
high altitudes
Answer: Option
Explanation:
No answer description is available. Let's discuss.
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