INTERNAL COMBUSTION ENGINES QUIZ

30° after top dead center

30° before bottom dead center

30° before top dead center

30° after bottom dead center

Acceleration in the rate of combustion

Increase in detonation

Any one of these

Pre-ignition

Geometric similarity

Kinematic similarity

None of these

Dynamic similarity

30 kW two-stroke petrol engine running at 1500 r.p.m.

30 kW four-stroke diesel engine running at 750 r.p.m.

30 kW four-stroke petrol engine running at 1500 r.p.m.

30 kW two-stroke diesel engine running at 750 r.p.m.

25 bar

20 bar

10 bar

35 bar

100

0

120

50

Equally efficient

None of the listed here

More efficient

Less efficient

Oil sludge in the engine crank case

Formation of hard coating on piston skirts

Detonation

Piston ring and cylinder wear

Temperature at which it solidifies or congeals

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

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

To distribute power

To time the spark

To distribute spark

To distribute current