Top 350+ Solved Automobile Engineering MCQ Questions Answer
Q. In a diesel engine a clogged nozzle could result in
a. Excessive fuel consumption
b. Over-rich mixture
c. Excessive smoke
d. Failure to start
e. Any of the above
Q. For a spark plug M 14 x 1.25 the last figure 1.25 stands for
a. Gap between electrodes in mm
b. Pitch of plug thread
c. Electrode diameter in mm
d. Tip width in mm
e. Size of plug thread
Q. The knocking in S.I. engines is characterised by sudden auto-ignition of the change
a. nearest to the spark plug
b. farthest away from the spark plug
c. in the middle from the spark plug
d. none of the above
e. None of the above
Q. Ignition coil is used to
a. Step down voltage
b. Step up power
c. Step down current
d. Step up voltage
e. Step up current
Q. Increasing the temperature of intake air in an I.C. engine will
a. increase the efficiency
b. decrease the efficiency
c. increase or decrease the efficiency
d. None of the above
e. Low ambient temperature
Q. The Diesel fuel pump is designed to supply fuel
a. At constant quantity at all engine speeds
b. In excess quantity than required by the injection pump
c. Just sufficient against the demand of the injection pump
d. In sufficient quantity in accordance with the engine speed
e. In less quantity than required by the injection pump
Q. The phenomenon by which a fuel catches fire without external flame is known as
a. pre-ignition
b. detonation
c. ignition lag
d. auto-ignition
e. None of the above
Q. Air resistance to a car at 20 kmph is R. The air resistance at 40 kmph would be
a. 4R2
b. 2 R
c. R2
d. R
e. 4 R
Q. The knocking in C.I. engine can be prevented if the first element of the fuel and air is having
a. low density
b. medium density
c. high density
d. none of the above
e. None of the above
Q. Exhaust gas leakage into the cooling system is most likely be due to defective
a. Cylinder head gasket
b. Manifold gasket
c. Water pump
d. Radiator
e. Any of the above
Q. The value overlap in case of four stroke petrol engine is approximately
a. 30?
b. 60?
c. 90?
d. 120?
e. None of the above
Q. Driving wheel hearings in automobiles are always
a. Bush bearing
b. Clad metal bearings
c. Anti-friction bearings
d. Either (A) or (B)
e. Either (B) or (C)
Q. The level of electroyte in automobiles battery should be
a. Exactly at the level of the plates
b. 15 mm below the top of plates
c. 5 - 10 mm below the top of plates
d. Upto the maximum permissible level
e. 10 - 15 mm above top of plates
Q. The exhaust value remains open approximately for
a. 160?
b. 180?
c. 190?
d. 235?
e. None of the above