internal combustion engine (S.i. & c.i. engine) MCQ

The thermal efficiency of a diesel cycle can be increased by:  MCQ is given below:

Q22. The thermal efficiency of a diesel cycle can be increased by

(a) increasing both compression ratio and cutoff ratio
(b) decreasing both compression ratio and cutoff ratio
(c) decreasing compression ratio and increasing cutoff ratio
(d) increasing compression ratio and decreasing cutoff ratio

TSPSC AEE 2015

Ans: (d) increasing compression ratio and decreasing cutoff ratio
The thermal efficiency of a diesel cycle can be increase by increasing compression ratio and increasing cutoff ratio:

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