INTERNAL COMBUSTION ENGINES QUIZ

None of these

1 - rγ - 1

1 - (1/rγ - 1)

1 + rγ - 1

Starts at top dead center and ends at 40° before bottom dead center

May start and end anywhere

Starts at 40° after bottom dead center and ends at 10° before top dead center

Starts at 40° before top dead center and ends at 40° after top dead center

Not effected

None of these

Increase

Decrease

Higher

Unaffected

Lower

Dependent on other factors

Effective compression ratio

Ignition time

Volumetric efficiency

Clearance volume

Air used for forcing burnt gases out of engine's cylinder during the exhaust period

Air used for combustion sent under pressure

Forced air for cooling cylinder

Burnt air containing products of combustion

Beginning of suction stroke

Beginning of exhaust stroke

End of exhaust stroke

End of suction stroke

120

0

100

50

Overall efficiency

Relative efficiency

Net efficiency

Efficiency ratio

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

Temperature at which it solidifies or congeals

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

It catches fire without external aid