51.
The increase in intake temperature of internal combustion engines will _________ efficiency.

52.
During idling, a petrol engine requires _________ mixture.

53.
The cam shaft of a four stroke I.C. engine running at 1500 rpm will run at

54.
Polymerization is a chemical process in which molecules of a compound become

55.
The theoretically correct mixture of air and petrol is

56.
An hmh flame speed is obtained in diesel engine when air fuel ratio is

57.
A stoichiometric air-fuel ratio is

58.
The temperature of interior surface of cylinder wall in normal operation is not allowed to exceed

59.
A two stroke cycle engine gives ________ the number of power strokes as compared to the four stroke cycle engine, at the same engine speed.

60.
The fuel air ratio in a petrol engine fitted with suction carburettor, operating with dirty air filter as compared to clean filter will be

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