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What per cent of supplied energy is converted into mechanical work by an IC engine?

a) 10%-20%
b) 30%-40%
c) 50%-60%
d) 70%-80%

Answer: b
Explanation: An IC engine on average is capable of converting just 30-40% of the supplied energy into mechanical work because a large part of the waste energy is in the form of heat that is released to the environment through coolant, fins etc.

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