Internal Combustion Engines
The actual volume of fresh charge admitted in 4-stroke petrol engine is

Equal to stroke volume and clearance volume
Equal to stroke volume
More than stroke volume
Less than stroke volume

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

Opens at 15° before top dead center and closes at 20° after top dead center
Opens at 15° after top dead center and closes at 20° before bottom dead center
May open and close anywhere
Opens at top dead center and closes at bottom dead center

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Internal Combustion Engines
Flash point of fuel oil is

Temperature at which 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
Temperature at which it solidifies or congeals
Indicated by 90% distillation temperature, i.e. when 90% of sample oil has distilled off

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