Question

The internal losses in an engine are ____________

(a) pumping losses

(b) brake losses

(c) combustion losses

(d) all of the mentioned

The question was posed to me at a job interview.

This intriguing question originated from Measurement and Testing in division Measurements and Testing/Performance Parameters and Characteristics of IC Engine

Answer 1

The correct answer is:

(d) All of the mentioned

Internal losses in an engine include pumping losses (energy lost in moving air and exhaust gases through the engine), brake losses (friction and mechanical losses in engine components), and combustion losses (energy lost in incomplete combustion or heat dissipation). All these contribute to the overall internal losses in an engine.