IC Engines and Nuclear Power Plants MCQ with Answers

IC Engines and Nuclear Power Plants MCQ with Answers

76) Which of the following statement is wrong ?

In compression ignition engines, detonation occurs near the beginning of combustion.

Since the fuel, in compression ignition engines, is injected at the end of compression stroke, therefore, there will be no pre-ignition.

To eliminate knock in compression ignition engines, we want to achieve auto-ignition not early and desire a long delay period.

In compression ignition engines, because of hetrogeneous mixture, the rate of pressure rise is comparatively lower.

Answer is:

To eliminate knock in compression ignition engines, we want to achieve auto-ignition not early and desire a long delay period.

77) The maximum propulsive efficiency of a turbo-jet engine is at a speed of

Answer is:

2400 km/h

78) In order to mix air and petrol in the required proportion and to supply it to the engine during suction stroke, then __________ is employed.

Answer is:

carburettor

79) The advancing of spark timing in spark ignition engines will __________ knocking tendency.

Answer is:

increase

80) The knocking in spark ignition engines can be reduced by

Answer is:

retarding the spark and increasing the engine speed

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