decreasing the density of intake air
increasing the temperature of intake air
increasing the pressure of intake air
decreasing the pressure of intake air
Agree
Disagree
cylinder walls being too hot
overheated spark plug points
red hot carbon deposits on cylinder walls
any one of these
starts at 15 Degree before top dead centre and ends at 30 Degree after top dead centre
starts at top dead centre and ends at 30? after top dead centre
starts at 15 Degree after top dead centre and ends at 30 Degree before bottom dead centre
may start and end anywhere
to reduce mass of the engine per brake power
to reduce space occupied by the engine
to increase the power output of an engine when greater power is required
all ofthe above