Question: For a multi-stage compressor, the polytropic efficiency is constant throughout for all the stages.
[A].True
False
[A].
[B].
Answer: Option A
Explanation:
No answer description available for this question.
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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
Question: 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
p2 = p1.p3
P2 = Pa x p3/p1
p2 = pa p3/p1
[A].
[B].
[C].
[D].
Answer: Option B
Explanation:
No answer description available for this question.
In a four stage compressor, if the pressure at the first and third stage are 1 bar and 16 bar, then the delivery pressure at the fourth stage will be
Question: In a four stage compressor, if the pressure at the first and third stage are 1 bar and 16 bar, then the delivery pressure at the fourth stage will be
[A].1 bar
16 bar
64 bar
256 bar
[A].
[B].
[C].
[D].
Answer: Option C
Explanation:
No answer description available for this question.
In n1 and n2 are the indices of compression for the first and second stage of compression, then the ratio of workdone on the first and second stages (W1/W2) with perfect intercoooing is given by
Question: In n1 and n2 are the indices of compression for the first and second stage of compression, then the ratio of workdone on the first and second stages (W1/W2) with perfect intercoooing is given by
[A].
[A].
[B].
[C].
[D].
Answer: Option B
Explanation:
No answer description available for this question.
For perfect intercooling in a three stage compressor,
Question: For perfect intercooling in a three stage compressor,
[A].p1p2 = p3p4
p1p3 = p2p4
[A].
[B].
[C].
[D].
Answer: Option A
Explanation:
No answer description available for this question.
For perfect intercooling in a two stage compressor,
Question: For perfect intercooling in a two stage compressor,
[A].p1 = p3
p1 = p2p3
[A].
[B].
[C].
[D].
Answer: Option A
Explanation:
No answer description available for this question.
For minimum work required to compress and deliver a quantity of air by multi-stage compression,
Question: For minimum work required to compress and deliver a quantity of air by multi-stage compression,
[A].the compression ratio in each stage should be same
the intercooling should be perfect
the workdone in each stage should be same
all of the above
[A].
[B].
[C].
[D].
Answer: Option D
Explanation:
No answer description available for this question.
In a high pressure compressor, the delivery pressure is
Question: In a high pressure compressor, the delivery pressure is
[A].1 to 5 bar
5 to 8 bar
8 to 10 bar
10 to 15 bar
[A].
[B].
[C].
[D].
Answer: Option C
Explanation:
No answer description available for this question.
A compressor at high altitudes will require __________ power.
Question: A compressor at high altitudes will require __________ power.
[A].same
less
more
[A].
[B].
[C].
Answer: Option B
Explanation:
No answer description available for this question.
An aftercooler is used to
Question: An aftercooler is used to
[A].remove impurities from air
reduce volume of air
cause moisture and oil vapour to drop out
cool the air
[A].
[B].
[C].
[D].
Answer: Option C
Explanation:
No answer description available for this question.