Discussion
Assertion (A): A high bypass turbofan is preferred to a turbojet for subsonic transport.
Reason (R): Accelerating more air more gently gives higher propulsive efficiency at subsonic speeds.
Select the correct answer from the options below.
Answer: B
Both statements are true and the second is the reason. The turbojet's large velocity difference wastes energy in the jet at those speeds, which is why the turbofan displaced it on essentially every transport aircraft built since the nineteen sixties.
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