In a four stroke cycle diesel engine, the exhaust valve

A Opens at 30° before bottom dead centre and closes at 10° after top dead centre
B Opens at 30° after bottom dead centre and closes at 10° before top dead centre
C Opens at bottom dead centre and closes at top dead centre
D May open and close anywhere

Correct Answer: Opens at 30° before bottom dead centre and closes at 10° after top dead centre

In a four stroke cycle diesel engine, the exhaust valve Opens at 30° before bottom dead centre and closes at 10° after top dead centre
Bissoy MCQ
#Mechanical Engineering #Internal Combustion Engines (I.C. Engines)

Related Questions

A two stroke cycle engine gives ________ the number of power strokes as compared to the four stroke cycle engine, at the same engine speed.
A Half
B Same
C Double
D Four times
Thermal efficiency of a two stroke cycle engine is _________ a four stroke cycle engine.
A Equal to
B Less than
C Greater than
D None of these
Theoretically, a four stroke cycle engine should develop _________ power as that of a two stroke cycle engine.
A Half
B Same
C Double
D Four times
The exhaust valve in a four stroke cycle petrol engine
A Opens at 50° before bottom dead center and closes at 15° after top dead center
B Opens at bottom dead center and closes at top dead center
C Opens at 50° after bottom dead center and closes at 15° before top dead center
D May open and close anywhere
In a four stroke cycle diesel engine, the inlet valve
A Opens at 20° before top dead center and closes at 40° after bottom dead center
B Opens at 20° after top dead center and closes at 20° before bottom dead center
C Opens at top dead center and closes at bottom dead center
D May open and close anywhere
The fuel valve in a four stroke cycle diesel engine
A Opens at 15° after top dead center and closes at 20° before bottom dead center
B Opens at 15° before top dead center and closes at 20° after top dead center
C Opens at top dead center and closes at bottom dead center
D May open and close anywhere
In a four speed four stroke Diesel engine, the intake valve
A Opens at T.D.C. and closes at B.D.C.
B Opens at 20° before T.D.C. and closes at 35° after B.D.C.
C Opens at 10° after T.D.and closes at 20° before B.D.C.
D None of the above
In a four stroke cycle petrol engine, the pressure inside the engine cylinder during the suction stroke is __________ the atmospheric pressure.
A equal to
B below
C above
D middle
The size of inlet valve of an engine in comparison to exhaust valve is
A More
B Less
C Same
D More/less depending on capacity of engine
The scavenging efficiency of a four stroke cycle diesel engine is
A Below 50%
B Between 50 and 85%
C Between 85 and 95%
D Between 95 and 100%

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