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IC Engines and Nuclear Power Plants

Q1: The thermal efficiency of diesel engines is about

A 15%

B 30%

C 50%

D 70%

ANS:D - 70%

Explanation: The thermal efficiency of diesel engines is about 30-50%. This means that for every 100 units of fuel energy input, the engine is able to convert 30-50 units of that energy into useful work. The remaining energy is lost as heat or exhaust. The maximum theoretical efficiency of a diesel engine is about 70%. However, this is rarely achieved in practice due to factors such as friction, heat loss, and incomplete combustion.



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