Internal Combustion Engines
In a four stroke cycle petrol engine, the compression

Starts at 40° after bottom dead centre and ends at 30° before top dead centre
Starts at 40° before bottom dead centre and ends at 30° after bottom dead centre
May start and end anywhere
Starts at bottom dead centre and ends at top dead centre

ANSWER DOWNLOAD EXAMIANS APP

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

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

ANSWER DOWNLOAD EXAMIANS APP