In case of petrol engine, pre-ignition of the charge during compression stroke is
A.not possible
B.possible
C.possible during power stroke
D.none of the above
Category: Automobile Engineering Mcqs
In spark plug the gap between the electrodes is
A.10 mm
B.around 5 mm
C.around 1 mm
D.less than 1 mm
Highest useful compression ratio is an indicator of
A.knocking of a fuel at a particular pressure
B.knocking of a fuel at a particular temperature
C.knocking of a fuel in a particular engine
D.knocking of a fuel under specified conditions in a standard engine
In a Diesel engine the fuel injection pressure is usually in the range
A.100 to 170 atm
B.60 to 70 atm
C.30 to 40 atm
D.20 to 25 atm
E.10 to 15 atm
In actual practice, the exhaust value of a four stroke I.C. engine should close
A.exactly at the end of expansion stroke
B.slightly before the end of exhaust stroke
C.slightly after the end of exhaust stroke
D.none of the above
Dirt or gum in fuel nozzle or jets may cause
A.Excessive fuel consumption
B.Lack of engine power
C.Smoky black exhaust
D.White exhaust
E.Uneven engine speed
In an automobile the probable cause for dragging brakes could be
A.Lack of clearance
B.Drums out of round
C.Loose wheel bearings
D.Weak retracting spring
E.Any of the above
Air supply in case of Diesel engines is usually
A.10 percent deficient
B.Stoichometric
C.5 to 10 percent surplus
D.15 to 20 percent surplus
E.About 40 percent surplus
In order to engage securely and prevent dragging the clearance between release bearing and release collar in a clutch is usually
A.2 – 3 mm
B.10 – 15 mm
C.20 – 25 mm
D.30 – 35 mm
E.40 – 50 mm
A spark voltage needs a voltage of
A.12 V
B.24 V
C.220 V
D.440 V
E.5000 – 15000 V.
