SSC JE Mechanical Engineering 2018 Set 1 Paper

Question : 142 of 200

Marks: +1, -0

A reversible engine, which operates between temperature range of 1200 K and 600 K, rejects 30% of heat to the sink comes under the classification of?

Solution:

Efficiency of Carnot

η=1-T_2/T_1=1-600/1200=50%

Efficiency of engine

=1-Q_2/Q_1=1-30/100=70%

It is impossible, no engine can produce more than Carnot efficiency.

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