IC Engine Multiple Choice Questions with Answers

61 Which of the following is false statement : Excess quantities of sulphur in diesel fuel are Objectionable because it may cause the following

A piston ring and cylinder wear

B formation of hard coating on piston skirts

C oil sludge in the engine crank case

D detonation

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Answer: detonation

62 The actual volume of fresh charge admitted in 4-stroke petrol engine is

A equal to stroke volume

B equal to stroke volume and clearance volume

C less than stroke volume

D more than stroke volume

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Answer: less than stroke volume

63 The magneto in an automobile is basically

A transformer

B d.c. generator

C capacitor

D magnetic circuit

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Answer: d.c. generator

64 The reason for supercharging in any engine is to

A increase efficiency

B increase power

C reduce weight and bulk for a given out-put

D effect fuel economy

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Answer: reduce weight and bulk for a given out-put

65 Supercharging is essential in

A diesel engines

B gas turbines

C petrol engines

D aircraft engines

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Answer: aircraft engines

66 Flash point of fuel oil is

A minimum temperature to which1 oil is heated in order to give off inflammable vapours in sufficient quantity to ignite momentarily when brought in contact with a flame

B temperature at which it solidifies or congeals

C temperature at which it catches fire without external aid

D none of the above

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Answer: minimum temperature to which1 oil is heated in order to give off inflammable vapours in sufficient quantity to ignite momentarily when brought in contact with a flame

67 For the same power developed in I.C. engines, the cheaper system is

A naturally aspirated

B supercharged

C centrifugal pump

D turbo charger

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