INTERNAL COMBUSTION ENGINES QUIZ

Pour point of fuel oil is the

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

It catches fire without external aid

TRUE ANSWER : ?
YOUR ANSWER : ?

Which of the following statement is correct regarding normal cetane?

It is a standard fuel used for knock rating of diesel engines

Its chemical name is normal hexadecane

All of these

It has long carbon chain structure

TRUE ANSWER : ?
YOUR ANSWER : ?

The thermal efficiency of diesel engines on weak mixtures is

Higher

Lower

Unaffected

Dependent on other factors

TRUE ANSWER : ?
YOUR ANSWER : ?

The output of a diesel engine can be increased without increasing the engine revolution or size in following way

Heating incoming air

Supercharging

Scavenging

Feeding more fuel

TRUE ANSWER : ?
YOUR ANSWER : ?

A spark plug gap is kept from

0.2 to 0.8 mm

0.3 to 0.7 mm

0.6 to 1.0 mm

0.4 to 0.9 mm

TRUE ANSWER : ?
YOUR ANSWER : ?

Excess quantities of sulphur in diesel fuel are Objectionable because it may cause the following

TRUE ANSWER : ?
YOUR ANSWER : ?

If the compression ratio in I.C. engine increases, then its thermal efficiency will

Remain same

Increase

None of these

Decrease

TRUE ANSWER : ?
YOUR ANSWER : ?

The maximum propulsive efficiency of a turbojet engine is at a speed of

3000 km/h

2400 km/h

1000 km/h

2000 km/h

TRUE ANSWER : ?
YOUR ANSWER : ?

The advancing of spark timing in spark ignition engines will ___ knocking tendency.

Reduce

None of the listed here

Not effect

Increase

TRUE ANSWER : ?
YOUR ANSWER : ?

In petrol engines, advancing of the spark timing will ___ the knocking tendency.

Increase

Decrease

Not effect

None of the listed here

TRUE ANSWER : ?
YOUR ANSWER : ?

↑