Top 350+ Solved Automobile Engineering MCQ Questions Answer
Q. By supercharging
a. Power stroke becomes stronger
b. Loss in exhaust is reduced
c. Engine can be made to run smoother
d. Thermal efficiency of the engine can be improved
e. None of the above
Q. Automobile radiator is filled with
a. Hard water
b. Acidic water
c. Alkaline water
d. Rain water
e. Soft water
Q. Brake shoes are made of
a. Pressed steel
b. Cast aluminium
c. Plastic fibre
d. Either (A) or (B)
e. Either (A) or (C)
Q. Theoretical correct air-fuel ratio for tetrol engine is
a. 6 ; 1
b. 9 ; 1
c. 12 ; 1
d. 15 ; 1
e. 20 ; 1
Q. When IHP and FHP on an engine are known, we can calculate
a. Mean effective pressure
b. Specific air consumption
c. Revolutions per minute
d. Brake horse power
e. Compression ratio
Q. Magneto ignition system is used in scooters and motor cycles because
a. it is less costly
b. it is less bulky and requires less maintenance
c. it gives higher voltage across the terminals of spark plug
d. none of the above
e. None of the above
Q. In case of automobile moving under normal road conditions the amount of fuel injected is proportional to
a. speed of vehicle
b. square of speed of vehicle
c. square root of speed of vehicle
d. none of the above
e. None of the above
Q. As a general rule if facing on the friction disc are worn down to the rivet heads
a. The clutch should be replaced
b. The linkage should be adjusted
c. Rivets head should be filed
d. Rivets should be replaced
e. The friction disc should be replaced
Q. 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
e. None of the above
Q. 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
e. None of the above
Q. As the gap between the electrodes of the spark plug increases
a. spark intensity increases
b. voltage required for sparking increases
c. voltage required for sparking decreases
d. frequency of sparking increases
e. None of the above
Q. In order to easily start the precombustion chamber diesel engine, in the early cold morning
a. Spark plug is used
b. Injector is used
c. Glow plug is used
d. Petrol is poured through inlet manifold
e. None of the above
Q. Pick up the wrong statement
a. Theoretically correct air fuel mixture for petrol engine is about 1.5 : 1
b. Diesel engines are CI engines
c. SI engines are quality governed engines
d. High speed compression engines operate on dual combustion cycle
e. Thermal efficiency of diesel engine is about 34%
Q. While starting a engine the starter pinion meshes with
a. Gears in differential
b. Engine flywheel ring gear
c. Clutch
d. Gears in gear box
e. Propellor shaft
Q. The efficiency of mechanical brakes is usually
a. 85 - 95 percent
b. 60 - 70 percent
c. 30 - 40 percent
d. 99 percent
e. 95 - 98 percent