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91.

For a jet prepulsion unit, ideally the compressor work and turbine work are

A.	unequal	B.	equal
C.	not related to each other	D.	none of the above

92.

Greater the difference between jet velocity and aeroplane velocity

A.	greater the propulsive efficiency	B.	Lesser the propulsive efficiency
C.	unaffected is the propulsive efficiency	D.	None of the above