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Mechanical Engineering Objective Questions { Internal Combustion Engines }

337. A diesel engine as compared to petrol engine (both running ar rated load) is
A.More Efficient
B.Less Efficient
C.Equally Efficient
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338. The size of inlet valve of an engine in comparison to exhaust valve is
D.More/Less Depending On Capacity Of Engine
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339. In a cycle, the spark lasts roughly for
A.1 Sec
B.0.1 Sec
C.0.01 Sec
D.0.001 Sec
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340. Which of the following is false statement. Some of the methods used to reduce diesel smoke are as follows
A.Using Additives In The Fuel
B.Engine Derating I.E. Reducing The Maxi-Mum Flow Of Fuel
C.Increasing The Compression Ratio
D.Adherence To Proper Fuel Specification
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341. The fuel air ratio in a petrol engine fitted with suction carburetor, operating with dirty air filter as compared to clean filter will be
C.Remain Unaffected
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342. Pick up the wrong statement about supercharging
A.Supercharging Reduces Knocking In Diesel Engines
B.There Can Be Limited Supercharging In Petrol Engines Because Of Detonation
C.Supercharging At High Altitudes Is Essential
D.Supercharging Results In Fuel Economy
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343. 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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