Internal Combustion Engines
The expansion of fuel in a four stroke cycle diesel engine

Starts at 15° after top dead center and ends at 30° before bottom dead center
Starts at 15° before top dead center and ends at 30° after top dead center
Starts at top dead center and ends at 30° after top dead center
May start and end anywhere

ANSWER DOWNLOAD EXAMIANS APP

Internal Combustion Engines
Fuel consumption of diesel engines is not guaranteed at one quarter load because at such low loads

The small difference in cooling water temperature or in internal friction has a disproportionate effect
The friction is unpredictable
The friction is high
The engine is rarely operated

ANSWER DOWNLOAD EXAMIANS APP