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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