A) two stroke
B) three stroke
C) four stroke
D) one stroke
Correct Answer: C
Solution :
A few manufacturers have introduced 4-stroke engine, the 4-stroke engine has higher fuel efficiency, better volumetric efficiency, complete fuel combustion and minimum air pollution. The engine is provided with a separate oil tank to supply lubrication oil through the oil pump. At low speed and low load extra oil is not supplied to the engine. This minimizes oil consumption and maximizes the interval between de-carbonisation and thereby minimizes air pollution.
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