Automobile Engineering MCQ with Answers pdf download
1. In a ventilated disc brake
A. A duct directs air towards the caliper for cooling while the vehicle is moving
B. Caliper is covered with cooling fins
C. Disc contains many small holes for optimum cooling performance
D. Disc contains radial vanes between its rubbing surfaces for optimum cooling performance
Answer: Option D
Solution:
The "ventilated" disc design helps to dissipate the generated heat and is commonly used on the more-heavily loaded front discs.
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2. A traction control system (TCS) in automobiles controls the
A. Vibrations on the steering wheel
B. Engine power during acceleration
C. Torque that is transmitted by the tyres to the road surface
D. Stopping distance in case of emergency
Answer: Option C
Solution:
A traction control system (TCS) in automobiles controls the torque that is transmitted by the tyres to the road surface
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3. The number of exhaust manifolds in a V6 engine is
A. One
B. Two
C. Four
D. Eight
Answer: Option B
Solution:
The number of exhaust manifolds in a V6 engine is Two
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4. The most commonly used power plant in automobiles is
A. Gas turbine
B. I.C. engine
C. Battery
D. None of these
Answer: Option B
Solution:
The most commonly used power plant in automobiles is I.C. engine
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5. The commonly used antifreeze solution in automobiles is
A. Carbon disulphide
B. Ethylene glycol
C. Ammonium chloride
D. Freon-12
Answer: Option B
Solution:
The commonly used antifreeze solution in automobiles is Ethylene glycol
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Automobile Engineering MCQ with Answers pdf download
6. In bias ply tyres
A. All plies run parallel to one another
B. Belts of steel mesh are used in the tyres
C. One ply layer runs diagonally one way and another layer runs diagonally the other way
D. All of the above
Answer: Option C
Solution:
Bias-ply tires are built with plies that are layered so they crisscross over each other. This creates a more rugged design, with greater puncture resistance in the sidewall.
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7. In radial tyres
A. One ply layer runs diagonally one way and another layer runs diagonally the other way
B. All plies run parallel to one another and vertical to tyre bead
C. Inner tubes are always used
D. None of these
Answer: Option B
Solution:
In radial tyres All plies run parallel to one another and vertical to tyre bead
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8. The gradient resistance to a vehicle having a mass of 980 kg moving on an incline of 10° is
A. 1.6694 N
B. 16.694 N
C. 166.94 N
D. 1669.4 N
Answer: Option D
Solution:
Given data:
Mass = 980 kg
Angle of inclination = 10°
Equation we used is,
Gradient resistance is given by Gr = W sin (angle of inclination)
Gr = 980 × sin (10)
= 170.175 kg × 9.81
= 1669.41 N.
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9. In aluminium cylinder blocks, the cylinder liners are made of
A. Aluminium
B. Ceramic
C. Brass
D. Cast iron
Answer: Option D
Answer & Solution
Solution:
In aluminium cylinder blocks, the cylinder liners are made of Cast iron
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10. The brake pedal during ABS operation
A. Is pushed upward forcefully
B. Pedal stroke becomes longer
C. Transmits slight kickback to the driver's foot
D. All of the above
Answer: Option C
Solution:
The brake pedal during ABS operation Transmits slight kickback to the driver's foot
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Automobile Engineering MCQ with Answers pdf download
11. When the front wheels of a vehicle are locked during braking, then
A. Stopping distance becomes extremely long
B. Front tyres skid across the road surface, and the vehicle spins around
C. Rear tyres skid across the road surface, and the vehicle spins around
D. Driver loses control over the steering, and the vehicle continues moving in its current direction
Answer: Option D
Solution:
When the front wheels of a vehicle are locked during braking, then Driver loses control over the steering, and the vehicle continues moving in its current direction
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12. What type of bearing is used for main bearings and connecting rod bearings?
A. Ball bearings
B. Plain bearings
C. Needle roller bearing
D. Taper roller bearing
Answer: Option B
Solution:
Plain bearings are used for main bearings and connecting rod bearings
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13. During braking, the brake shoe is moved outward to force the lining against the
A. Wheel piston or cylinder
B. Anchor pin
C. Brake drum
D. Wheel rim or axle
Answer: Option C
Solution:
During braking, the brake shoe is moved outward to force the lining against the Brake drum
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14. The cam shaft in an engine is always mounted
A. Parallel to the crankshaft
B. Perpendicular to the crankshaft
C. Inclined to the crankshaft
D. None of these
Answer: Option A
Solution:
The cam shaft in an engine is always mounted Parallel to the crankshaft
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15. The included angle is the sum of the
A. Camber and castor
B. Castor and S.A.I.
C. Camber and S.A.I.
D. Camber and toe-in
Answer: Option C
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Automobile Engineering MCQ with Answers pdf download
16. The purpose of turning radius gauges is to measure the
A. Contact areas of the tyres
B. Free plays of the steering wheel
C. Turning radius of the left and right wheels
D. Difference in the toe angles of the left and right wheels
Answer: Option C
Solution:
A turning radius gauge is an instrument, consisting of a turntable and an attached gauge, which measures how many degrees the front wheel of a vehicle has turned left or right.
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17. Two advantages of using helical gears rather than spur gears in a
transmission system are
A. Strength and cost
B. Strength and less end thrust
C. Noise level and strength
D. Noise level and economy
Answer: Option C
Solution:
Two advantages of using helical gears rather than spur gears in a transmission system are Noise level and strength
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18. The best fuels for compression ignition engines are
A. Straight chain paraffin
B. Aromatics
C. Branched chain paraffin
D. Naphthalene
Answer: Option D
Solution:
The best fuels for compression ignition engines are Naphthalene
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19. In Spark Ignition Engine
A. Only air is introduced into the cylinder
B. The mixture of air and fuel is introduced into the cylinder from carburettor
C. Both (A) and (B)
D. None of these
Answer: Option B
Solution:
In Spark Ignition Engine the mixture of air and fuel is introduced into the cylinder from carburettor
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20. The exhaust gas from petrol engine contains
A. Petrol vapours
B. Water vapours
C. Carbon monoxide
D. All of these
Answer: Option D
Solution:
exhaust fumes contain certain poisonous chemicals, including carbon monoxide, sulfur dioxide, nitrogen oxides,
formaldehyde, benzene and soot, all of which can be detrimental to the human body if consistently inhaled in large quantities.
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Automobile Engineering MCQ with Answers pdf download
21. The petrol engine works on
A. Otto cycle
B. Carnot cycle
C. Diesel cycle
D. Rankine cycle
Answer: Option A
Solution:
The petrol engine works on Otto cycle
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22. The Diesel engine works on
A. Otto cycle
B. Carnot cycle
C. Diesel cycle
D. Rankine cycle
Answer: Option C
Solution:
The Diesel engine works on Diesel cycle
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23. The Diesel engines as compared to petrol engines require
A. Bigger flywheel
B. Smaller flywheel
C. Same size of flywheel
D. No flywheel
Answer: Option A
Solution:
The Diesel engines as compared to petrol engines require Bigger flywheel
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24. The cetane number of a Diesel fuel is a measure of
A. Volatility
B. Viscosity
C. Ignition quality
D. Delay period
Answer: Option D
Solution:
The cetane number of a Diesel fuel is a measure of Delay period
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25. The sequence in which the force is transmitted through a brake system when the brake pedal is depressed is
A. Brake pedal, master cylinder, brake lines, vacuum servo mechanism, brake pads
B. Brake pedal, vacuum servo mechanism, master cylinder, brake lines, brake pads
C. Brake pedal, master cylinder, vacuum servo mechanism, brake lines, brake pads
D. Brake pedal, brake lines, vacuum servo mechanism, master cylinder, brake pads
Answer: Option B
Solution:
The sequence in which the force is transmitted through a brake system when the brake pedal is depressed is Brake pedal, vacuum servo mechanism, master cylinder, brake lines, brake pads
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Automobile Engineering MCQ with Answers pdf download
26. The main purpose of an engine's air cleaner is that it
A. Controls the engine's air intake volume
B. Reduces the engine's air intake noise
C. Prevents rain water from entering the engine
D. Prevents dust and other foreign matter from entering the engine
Answer: Option D
Solution:
The main purpose of an engine's air cleaner is that it Prevents dust and other foreign matter from entering the engine
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27. It is necessary to maintain the valve clearances as they
A. Reduce the resistance to sliding that occurs between the cam and the tappet
B. Allow for lengthening of the valves owing to the heat of combustion
C. Increase the speed at which the valves move up and down
D. Make the crankshaft turn smoothly
Answer: Option B
Solution:
It is necessary to maintain the valve clearances as they Allow for lengthening of the valves owing to the heat of combustion
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28. The component of the oil filter that prevents the passage of metal particles
and sludge is
A. Element
B. Relief valve
C. Check valve
D. Case
Answer: Option A
Solution:
The component of the oil filter that prevents the passage of metal particles and sludge is Element
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29. The characteristic that is enhanced by the use of cylinder sleeves is
A. Cooling efficiency
B. Resistance to wear
C. Lubrication performance
D. None of these
Answer: Option B
Solution:
The characteristic that is enhanced by the use of cylinder sleeves is Resistance to wear
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30. The material generally used for cylinder sleeves is
A. Aluminium
B. Ceramic
C. Cast iron
D. Fibre reinforced plastic
Answer: Option C
Solution:
The material generally used for cylinder sleeves is Cast iron
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