Internal Combustion Engines
Flash point of fuel oil is

Temperature at which it solidifies or congeals
Indicated by 90% distillation temperature, i.e. when 90% of sample oil has distilled off
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
Temperature at which it catches fire without external aid

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

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

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Internal Combustion Engines
In a coil ignition system of petrol engines, a condenser is connected across the contact breaker in order to

Prevent sparking across the gap between the points
Cause more rapid break of the primary current, giving a higher voltage in the secondary circuit
Both (A) and (B)
None of these

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Internal Combustion Engines
As compared to air standard cycle, in actual working, the effect of variation in specific heats is to

Increase maximum pressure and maximum temperature
Reduce maximum pressure and maximum temperature
Increase maximum pressure and decrease maximum temperature
Decrease maximum pressure and increase maximum temperature

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