INTERNAL COMBUSTION ENGINES QUIZ

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

Indicated by 90% distillation temperature, i.e. when 90% of sample oil has distilled off

Temperature at which it solidifies or congeals

Less

Same

More

More or less depending on power rating

Excessive turbulence which removes most of the insulating gas boundary layer from the cylinder walls

Increase in the rate of heat transfer, there is a reduction in the power output and efficiency of the engine

High intensity of knock causes crankshaft vibration and the engine runs rough

None of these

Prony brake test

Morse test

Heat balance test

Motoring test

Same

Less

More

Less or more depending on operating conditions

Dependent on other factors

Higher

Unaffected

Lower

50

100

120

Governor

Carburettor

Fuel pump

Injector

Below

None of these

Above

Equal to

1000°C

250°C

500°C

2000°C