Fuel consumption of diesel engines is not guaranteed at one quarter load because at such low loads ____________
(a) the friction is high
(b) the friction is unpredictable
(c) the small difference in cooling water temperature or in internal friction has a disproportionate effect
(d) the engine is rarely operated
The question was asked during an interview.
I'd like to ask this question from Fuel Air Cycle in division Fuel Air and Actual Cycles and their Analysis of IC Engine