Ethyl fluid is used as
A.To increase cetane rotary of fuel
B.To increase octane rating of fuel
C.As a detonating agent
D.As a superior type of fluid compared to others
E.To improve lubricating quality of fuel
Category: Automobile Engineering Mcqs
The substance which when added in a small proportion into petrol reduces knocking is
A.iso-butane
B.n-heptane
C.methyl nepthalene
D.tetra ethyl lead
In an engine shows lack of power on running the probable cause could be
A.Poor compression
B.Faulty ignition
C.Overheating
D.Over cooling
E.Any of the above
The efficiency of an oil bath type air cleaner is usually
A.50%
B.60%
C.80%
D.90%
E.99%
The time before actual fuel injection and pump olunger starts to pump fuel, is known as
A.injection lag
B.overlap
C.ignition lag
D.none of the above
A thermostat is provided in automobile engines for
A.Controlling the temperature of the piston
B.Controlling the temperature of the cooling system
C.Regulating the temperature of lubricating oil
D.Regulating the temperature of suction air
E.Regulating the temperature of haust gases.
If the end mixture of S.I. engine is having low temperature and long igition delay, then knocking will
A.accelerate
B.decrease
C.remain constant
D.none of the above
If brake wheels get locked before the vehicle stops, the vehicle is said to be
A.Slipping
B.Rubbing
C.Sliding
D.Rolling
E.Skidding
Diesel engines are also known as
A.S.I. engines
B.C.I. engines
C.Steam engines
D.none of the above
The device which is used for atomising and vapourising the petrol fuel and mixing it with the air in varying proportions, to suit the changing operating conditions of the engine, is known as
A.injector
B.Spark plug
C.carburettor
D.none of the above
