SSC JE Mechanical Engineering 2018 Set 3 Paper

Question : 168 of 200

Marks: +1, -0

A carnot engine rejects 30% of absorbed heat at a sink at 30°C. The temperature of the heat source is

Solution:

Efficiency of engine

η=1-T_2/T_1

\;\;\;∵30 +273= 303 k

0.70=1-303/T_1⇒T_1=303/0.3

T_1= 1010K =1010 -273 =737 °C

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