Correct
Incorrect
✅ The correct answer is option A.
Compressors
Which of the following statement is correct as regard to centrifugal compressors?
The flow of air is parallel to the axis of the compressor.
The static pressure of air in the impeller increases in order to provide centripetal force on the air.
The impeller rotates at high speeds.
The maximum efficiency
✅ The correct answer is option B.
The air power of the compressor is also known as
indicated power
brake power
frictional power
none of these
✅ The correct answer is option A.
The performance of air compressor at high altitudes will be __________ as compared to that at sea level.
same
lower
higher
✅ The correct answer is option B.
The velocity of air entering in a rocket is __________ as compared to an aircraft.
zero
less
more
same
✅ The correct answer is option A.
A machine used to raise the pressure of air is called
gas turbine
I.C engine
compressor
air motor
✅ The correct answer is option C.
The operation of lifts, rams and pumps make use of compressed air.
Yes
No
✅ The correct answer is option A.
If the clearance ratio for a reciprocating air compressor is ‘K’, then its volumetric efficiency is given by
✅ The correct answer is option B.
Which of the following statement is correct relating to rocket engines ?
The combustion chamber in a rocket engine is directly analogous to the reservoir of a super sonic wind tunnel
The stagnation conditions exist at the combustion chamber
The exit velocities of exhaust gases are much higher than those in jet engine
all of the above
✅ The correct answer is option D.
Slip factor in a centrifugal compressor indicates the amount of air leaked from the storage vessel.
Yes
No
✅ The correct answer is option B.