Internal Combustion Engines
Pick up the wrong statement about supercharging

Supercharging results in fuel economy
Supercharging reduces knocking in diesel engines
Supercharging at high altitudes is essential
There can be limited supercharging in petrol engines because of detonation

ANSWER DOWNLOAD EXAMIANS APP

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

May start and end anywhere
Starts at bottom dead centre and ends at top dead centre
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

ANSWER DOWNLOAD EXAMIANS APP