The knocking in S.I. engines can be prevented if the end mixture is having
A.high density
B.medium density
C.low density
D.none of the above
Category: Automobile Engineering Mcqs
A heat-treated glass generally used in automobiles upon cracking bursts into
A.Sharp edged fragments
B.Small particles
C.Does not disintegrate
D.Either of the above
E.None of the above
The speed of the engine is increased or decreased by operating
A.Throttle valve
B.Choke valve
C.Steering
D.Clutch
E.Any of the above
The disadvantage of stratified charge engine is
A.reduced power for a given engine size
B.higher weight for bhp
C.poor reliability
D.All of the above
The condenser in ignition circuit of an S.I. engine
A.increases the battery voltage
B.decreases the current from battery
C.avoids arcing at contact breaker
D.none of the above
The level of electroyte in automobiles battery should be
A.15 mm below the top of plates
B.5 – 10 mm below the top of plates
C.Exactly at the level of the plates
D.10 – 15 mm above top of plates
E.Upto the maximum permissible level
Accumulation of rust and scale in the engine cooling system will cause
A.Slow warm up
B.Reduced output
C.Low exhaust temperature
D.More noise
E.Overheating
The maximum pressure generated by the fuel injection pump does not reach the nozzle end immediately. The lag is due to
A.friction in the oil column
B.pressure wave in the oil column
C.turbulence in the cylinder
D.none of the above
The advanctage of stratified charge engine is
A.better part load efficiency
B.resistance to knocking tendency
C.better volumetric efficiency
D.All of the above
Ignition coil is used to
A.Step up current
B.Step down current
C.Step up voltage
D.Step up power
E.Step down voltage
