Top 350+ Solved Automobile Engineering MCQ Questions Answer
Q. In a Diesel engine, the temperature of gases under full load may be of the order of
a. 100?C
b. 900-1000?C
c. 150-200?C
d. 200-300?C
e. 500-550?C
Q. In transmission system if the reverse gear slips out, the probable cause could be
a. Reverse sliding gear teeth worn out
b. Main shaft spines worn
c. Reverse idler gear teeth worn
d. Insufficient gear mesh
e. Any of the above
Q. The device for smoothening out the power inpulses from the engine is called
a. Clutch
b. Differential
c. Flywheel
d. Gear box
e. Torque convertor
Q. In which case the air fuel ratio is expected to be the highest?
a. Two stroke petrol engine
b. Gas turbine
c. Four stroke diesel engine
d. Two stroke diesel engine
e. Four stroke petrol engine
Q. Too rich mixture for a S.I. engine means air : fuel ratio of about
a. 15 ; 1
b. 13 ; 1
c. 17 ; 1
d. 14 ; 1
e. 10 ; 1
Q. During idling in a CI engine, the air fuel ratio may be of the order of
a. 30
b. 10
c. 15
d. 20
e. 5
Q. In automobile ignition system contact breaker is used for
a. Opening and closing the primary circuit
b. opening and closing the secondary circuit
c. increasing the duration of spark
d. increasing the intensity of spark
e. None of the above
Q. The spots from a car body are removed by
a. Soap containing agents
b. Soft sponge
c. Washing with water
d. Special cleaning agents
e. Rubber brush and water
Q. The ignition coil acts as
a. A capacitor
b. An inductor
c. A RC circuit
d. A step up transformer
e. A step down transformer
Q. If brake wheels get locked before the vehicle stops, the vehicle is said to be
a. Rubbing
b. Slipping
c. Rolling
d. Skidding
e. Sliding
Q. Theoretically air required for the combustion of one kg of fuel is
a. 17.4 kg
b. 16.7 kg
c. 18.9 kg
d. 10 kg
e. 14.5 kg
Q. Quality of diesel oil can be expressed in terms of cetane number and also
a. aniline point
b. API gravity
c. SAE number
d. diesel index
e. None of the above
Q. Automobile gears are generally made of
a. Mild steel
b. Alloy steel
c. Cast iron
d. Brass
e. Stainless steel
Q. In a S.I. engine high air velocity through air hom may be of the order of
a. 100 m/s
b. 10 m/s
c. 1 m/s
d. 5 m/s
e. 50 m/s
Q. In automobile, probable cause for ineffective brakes could be
a. Grease on lining
b. Excessive lining wear
c. Drums scored
d. Any of above
e. None of the above