Question

The major loss in a S.I. engine is due to ____________

(a) exhaust blow down

(b) pumping

(c) incomplete combustion

(d) variation in specific heat and chemical equilibrium

I had been asked this question in unit test.

The query is from Actual Cycle in portion Fuel Air and Actual Cycles and their Analysis of IC Engine

Answer 1

Correct answer is (d) variation in specific heat and chemical equilibrium

The best explanation: The major loss in a S.I. engine is due to variation in specific heat and chemical equilibrium while the major loss in a C.I. engine is loss due to incomplete combustion.