Exercise: Compressors Gas Dynamics And Gas Turbines

Questions for: Compressors Gas Dynamics And Gas Turbines

In the aircraft propellers
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 the presence of air
D:
none of the above
Answer: A
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The inlet pressure is always __________ the discharge pressure.
A:
equal to
B:
less than
C:
more than
D:
Answer: B
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The clearance volume in the compressor is kept minimum because it effects on volumetric efficiency.
A:
Correct
B:
Incorrect
C:
D:
Answer: A
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The ratio of workdone per cycle to the stroke volume of the compressor is known as
A:
compressor capacity
B:
compression ratio
C:
compressor efficiency
D:
mean effective pressure
Answer: D
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For a two stage reciprocating compressor, compression from p1 to p3 is with perfect intercooling and no pressure losses. If compression in both the cylinders follows the same polytropic process and the atmospheric pressure is pa, then the intermediate pressure p2 is given by
A:
p2 = (p1 + p3)/2
B:
p2 = p1.p3
C:
P2 = Pa x p3/p1
D:
p2 = pa p3/p1
Answer: B
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