INTERNAL COMBUSTION ENGINES QUIZ

In case of gas turbines, the gaseous fuel consumption guarantees are based on

High heat value

Calorific value

Low heat value

Net calorific value

TRUE ANSWER : ?
YOUR ANSWER : ?

The mechanical efficiency (Î·m) of the engine is given by

Î·m = I.P/B.P

Î·m = (B.P Ã— I.P)/100

None of these

Î·m = B.P/I.P

TRUE ANSWER : ?
YOUR ANSWER : ?

By higher octane number of spark ignition fuel, it is meant that the fuel has

Lower volatility

Longer ignition delay

Higher heating value

Higher flash point

TRUE ANSWER : ?
YOUR ANSWER : ?

The magneto in an automobile is basically

Transformer

Magnetic circuit

Capacitor

D.C. generator

TRUE ANSWER : ?
YOUR ANSWER : ?

A petrol engine has compression ratio from

15 to 25

10 to 15

25 to 40

6 to 10

TRUE ANSWER : ?
YOUR ANSWER : ?

The accumulation of carbon in a cylinder results in increase of

Clearance volume

Ignition time

Effective compression ratio

Volumetric efficiency

TRUE ANSWER : ?
YOUR ANSWER : ?

Antiknock for compression ignition engines is

Tetra ethyl lead

Amyl nitrate

Napthene

Hexadecane

TRUE ANSWER : ?
YOUR ANSWER : ?

In a four stroke cycle petrol engine, the pressure inside the engine cylinder during the suction stroke is __________ the atmospheric pressure.

Above

Equal to

None of these

Below

TRUE ANSWER : ?
YOUR ANSWER : ?

The temperature of interior surface of cylinder wall in normal operation is not allowed to exceed

80°C

180°C

120°C

240°C

TRUE ANSWER : ?
YOUR ANSWER : ?

If V₁ is the jet velocity and V₀ is the vehicle velocity, then the propulsive efficiency of a rocket is given by

V₁/(V₀ + V₁)

[2(V₀/V₁)]/ [1 + (V₀/V₁)²]

(V₀/V₁)/ [1 + (V₀/V₁)²]

V₀/(V₀ + V₁)

TRUE ANSWER : ?
YOUR ANSWER : ?

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