INTERNAL COMBUSTION ENGINES QUIZ

Four times

Double

Half

Same

High heat value of oil

Net calorific value of oil

Calorific value of fuel

Low heat value of oil

Water

None of these

Alcohol

Lead

Instantaneous and rapid burning of the first part of the charge

Reduction of delay period

Instantaneous auto ignition of last part of charge

Delayed burning of the first part of the charge

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

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

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

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

None of the listed here

Octane number

Calorific value

Cetane number

50

120

100

To increase the power output of an engine when greater power is required

To reduce space occupied by the engine

To reduce mass of the engine per brake power

All of these

Avoidance of overloading

Increasing the compression ratio

Adherence to proper fuel specification

Using additives in the fuel

V₀/(V₀ + V₁)

V₁/(V₀ + V₁)

(V₀/V₁)/ [1 + (V₀/V₁)²]

[2(V₀/V₁)]/ [1 + (V₀/V₁)²]