Top 350+ Solved Automobile Engineering MCQ Questions Answer
Q. As the number of cylinders on multi-cylinder engines increases the power to weight ratio
a. Has nothing to do with number of cylinders
b. Decreases
c. Increases
d. Remains the same
e. Becomes zero
Q. Which of the following part is not needed on spark ignition engines using magneto ignition?
a. Battery
b. Spark plug
c. Distributor
d. Induction coil
e. None of the above
Q. Aluminium cylinder blocks require
a. No liners
b. Aluminium liners
c. Surface hardening
d. Cast iron liners
e. Mild steel liners
Q. In case of Diesel engines into the engine cylinder during suction stroke
a. air and fuel is drawn
b. only fuel is drawn
c. only air is drawn
d. none of the above
e. None of the above
Q. Too early ingition in SI engine will cause
a. pinking, power loss
b. hotter running, power loss
c. power loss, higher fuel consumption
d. none of the above
e. None of the above
Q. Castor is
a. forward tilt of the king pin
b. backward tilt of the king pin
c. either of (A) and (B) above
d. none of the above
e. None of the above
Q. Ignition advance is expressed in terms of
a. Crank angle
b. Millimetres of piston travel before TDC
c. Time in milliseconds
d. Any of the above
e. None of the above
Q. The most popular firing order in case of cylinder in-line IC engine is
a. 1-2-3-4
b. Alcohol
c. 1-4-2-3
d. 4-3-2-1
e. 1-3-4-2
Q. The quantity of oil delivered by injection pump in diesel engine is controlled by
a. upward movement of control helix
b. downward movement of control helix
c. rotation of control helix
d. none of the above
e. None of the above
Q. As a rule, before the pistons are removed it is necessary to remove the
a. Piston rings
b. Circlip
c. Camshaft
d. Crankshaft
e. Gudgeon pin
Q. Deposit of carbon in the exhaust system
a. Will have no effect on back pressure
b. Will reduce back pressure
c. Will increase back pressure
d. Will result in black smoke
e. Will increase noise level
Q. In case of a Petrol engine, the spark plug should produce the spark
a. exactly at the end of compression stroke
b. slightly before the end of compression stroke
c. slightly after the end of exhaust stroke
d. none of the above
e. None of the above
Q. In four cylinder engines the ignition advance depends on
a. Quality of fuel
b. Engine speed
c. Cylinder dimensions
d. (A) and (B) only
e. (A), (B) and (C) together
Q. In an automobile engine the temperature of the piston will be more at
a. The piston walls
b. The skirt of the piston
c. The piston rings
d. The piston pin
e. The crown of the piston
Q. If a lead acid battery is fully charged at specific gravity of 1.28 and fully discharged at specific gravity of 1.11 then at specific gravity of 1.19, the battery will be
a. nearly fully charged
b. more than 50% charged
c. 50% charged
d. less than 50% charged
e. None of the above