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AE & JE ME Quiz Power plant Compressor
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Question 1
In axial flow compressor air enters and leaves the stage axially. Find the degree of reaction, if the whirl component of air leaving the rotor is one third of the mean peripheral velocity of rotor blades.
Question 2
Consider the following statements:
For a large aviation gas turbine, an axial flow compressor is usually preferred over centrifugal compressor because
1) the maximum efficiency is higher.
2) the frontal area is lower
3) the pressure rise per stage is more
4) the cost is lower.
Which of these statements are correct?
For a large aviation gas turbine, an axial flow compressor is usually preferred over centrifugal compressor because
1) the maximum efficiency is higher.
2) the frontal area is lower
3) the pressure rise per stage is more
4) the cost is lower.
Which of these statements are correct?
Question 3
For centrifugal compressors, which one of the following is the correct relationship between Pressure coefficient 
Slip factor 
work input factor 
and isentropic efficiency 
?
Slip factor work input factor and isentropic efficiency ? Question 4
A 3-stage reciprocating compressor has suction pressure of 1 bar delivery pressure of 27 bar. For minimum work of compression, the delivery pressure of 1st stage is
Question 5
Which one of the following statements is correct regarding Reheat factor ?
Question 6
For a 2-stage air compressor for the maximum efficiency of compressor, consider the following statements:
1)
2)
3) Intercooling between the stages is complete
4) Work is equally shared by the two stages
Which of these statements are correct?
1)
2)
3) Intercooling between the stages is complete
4) Work is equally shared by the two stages
Which of these statements are correct?
Question 7
In an axial flow compressor, the ratio of pressure rise in the rotor blades to the pressure rise in the compressor in one stage is known as
Question 8
In a radial blade centrigugal compressor, the velocity of blade tip at outlet is 400 m/s and slip factor is 0.9. Assuming the absolute velocity at inlet to be axial, the work done per kg of flow is
Question 9
The flow in the vaneless space between the impeller exit and diffuser inlet of a centrifugal compressor can be assumed as____.
Question 10
Which one of the following types of compressors is mostly used for supercharging of I.C. engines?
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