Internal Combustion Engines
The delay period in compression ignition engines depends upon

Temperature and pressure in the cylinder at the time of injection
Relative velocity between the fuel injection and air turbulence pressure of residual gases
All of these
Nature of the fuel mixture strength

ANSWER DOWNLOAD EXAMIANS APP

Internal Combustion Engines
Volatility of diesel fuel oil is

Indicated by 90% distillation temperature, i.e., when 90% of sample oil has distilled off
Temperature at which it solidifies or congeals
It catches fire without external aid
Minimum temperature to which oil is heated in order to give off inflammable vapours in sufficient quantity to ignite momentarily when brought in contact with a flame

ANSWER DOWNLOAD EXAMIANS APP