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Automobile Engineering MCQs
2

Automobile Engineering Practice Set-5

May 6, 2021

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1. The function of a proportioning control valve (PCV) in a brake system is to

Cause less brake fluid pressure to act on the rear brakes than on the front brakes when the fluid pressure exceeds a predetermined level

Reduce the brake fluid pressure when the brakes approach their lockup point

Ensure that equal pressure is supplied to the front and rear brakes throughout every braking operation

Cause less brake fluid pressure to act on the front brakes than on the rear brakes when the fluid pressure exceeds a predetermined level

2. The main characteristics of a maintenance free (MF) battery is that

Since it is sealed, the water in maintenance free battery is not lost through evaporation thus accordingly it is not necessary to top up the cells with water

A maintenance free battery has a relatively short shelf life when compared with standard batteries

A maintenance free battery requires little maintenance during normal use and it is sufficient to add water instead of an electrolyte containing sulphuric acid

Recharging of a maintenance free battery is neither required nor possible

3. The fuel pump in the programmed fuel injection (PFI) system is located

Between the fuel filler pipe and fuel tank

On the engine compartment bulkhead

On the distributor mounting in the engine compartment

In the fuel tank

4. Which of the following is not an automobile?

Aeroplane

Motor cycle

Passenger car

Truck

5. Caster is a

(C) Either 'A' or 'B'

(D) None of these

(A) Forward tilt of the kingpin

(B) Backward tilt of the kingpin

6. The damper fluid leakage typically occur from

Coil spring mounting

Clearance between inner and outer tubes of damper

Bottom of damper

Upper damper mounting

7. A battery can be charged by

Applying voltage in the reverse direction to that of charging

Applying a voltage in the same direction to that of charging

Adding sulphuric acid

Adding distilled water

8. The function of an oil control orifice is that it

Regulates the pressure of engine oil supplied by the oil pump for the lubrication of cylinder head mechanism and other purposes

Returns cylinder head lubricating oil to the oil pan at high speed

Removes impurities from cylinder head lubricating oil

Turns oil into fine mist for spray lubrication

9. The included angle is the sum of the

Camber and S.A.I.

Camber and toe in

Castor and S.A.I.

Camber and castor

10. Damper is also known as

Torsion bar

Radius rod

Shock absorber

Spring

Page 2 of 5

11. When the front wheels of a vehicle are locked during braking, then

Stopping distance becomes extremely long

Front tyres skid across the road surface, and the vehicle spins around

Rear tyres skid across the road surface, and the vehicle spins around

Driver loses control over the steering, and the vehicle continues moving in its current direction

12. An under-inflated tyre will wear the tread most

In the cross direction

In the lateral direction

Near the edges

Near the centre

13. Vulcanizing means

Spraying with special paint

Heating rubber under pressure

Melting rubber while stirring it

None of these

14. The main function of a resonator is that it

Enhances intake efficiency

Reduces the intake air noise

Regulates the intake air flow rate

Regulates the intake air temperature

15. The fuel pump of a programmed fuel injection (PFI) system operate for two seconds when the ignition is turned to the start position to

Enable the pump's fault diagnosis function to operate

Warm up and lubricate the pump

Supplies a large amount of fuel and thereby creates a choke effect

Pressurise the fuel system before the engine is started

16. Instead of valves, the ports are used in case of

None of these

V6 engines

Four stroke I.C. engines

Two stroke I.C. engines

17. The ignition in a spark ignition engine takes place when the piston is

Exactly at the T.D.C. position on its compression stroke

Leaving the T.D.C. position on its compression stroke

Approaching the T.D.C position on its exhaust stroke

Approaching the T.D.C. position on its compression stroke

18. The starting system includes

A distributor, a starter, and an ignition switch

A battery, a starter, and a distributor

A battery, a distributor, and an ignition switch

A battery, a starter, and an ignition switch

19. When turning a corner

All of the above

The inside front wheels has a greater angle than the outside wheel

The front wheels are turning on different angles

The front wheels are toeing out

20. The timing belt is attached to the camshaft pulley and

Distributor

Radiator fan pulley

Alternator pulley

Timing belt drive pulley

Page 3 of 5

21. A three way catalytic converter

Reduces N₂, H₂O, and CO₂ emission levels

Removes CO, HC, and NO₂ from the exhaust gases passing through it

Re-circulates exhaust gases

Burns fuel vapour gases

22. The best fuels for compression ignition engines are

Straight chain paraffin

Branched chain paraffin

Naphthalene

Aromatics

23. The lubrication oil flow in an engine is in the order as

Oil pump, oil strainer, relief valve, oil filter, cylinder block, cylinder head and oil pan

Oil strainer, oil filter, relief valve, oil pump, cylinder block, cylinder head and oil pan

Oil strainer, oil pump, relief valve, oil filter, cylinder block, cylinder head and oil pan

Oil strainer, oil pump, relief valve, oil filter, cylinder head, cylinder block and oil pan

24. A laminated glass upon cracking

Breaks into the form of crystals

Bursts into sharp edged fragments

Sandwiched layer traps the fragments

Bursts into granular pieces

25. The order in which effort applied to the steering wheel is transferred to the front wheel is

Steering wheel, steering shaft, steering gearbox, tie rod, steering knuckle, front wheels

Steering wheel, steering gearbox, steering shaft, tie rod, steering knuckle, front wheels

Steering wheel, steering shaft, steering gearbox, steering knuckle, tie rod, front wheels

Steering wheel, tie rod, steering gearbox, steering shaft, steering knuckle, front wheels

26. The combustion process in a Diesel engine is a

Constant pressure process

Constant temperature process

Constant volume process

Adiabatic process

27. The rolling resistance is because of the friction between the

None of these

Wheel rim and tyre

Wheel rim and road surface

Tyre and the road surface

28. The basic purpose of tyre rotation on automobiles is to

Avoid ply separation

Equalize wear

Get better ride

None of these

29. The tyre rotation is generally done at

1000 km

10,000 km

4000 km

6000 km

30. The most accurate ignition system of a spark ignition engine is

Magneto system

Electronic control unit system

Battery system

Magneto and electronic system

Page 4 of 5

31. The mechanical efficiency (ηm) of an I.C. engine is equal to (where I.P. = Indicated power, B.P. = Brake power and F.P. = Frictional power)

F.P/B.P.

B.P/I.P.

B.P/F.P.

I.P/B.P.

32. A front stabilizer bar is used to

All of the above

Provide a softer ride

Control suspension movement and body roll

Increase vehicle load carrying capacity

33. Which of the following parameter can be adjusted by modifying the tie rod attachment length?

Toe

Caster

Steering gear ratio

Camber

34. The material generally used for cylinder sleeves is

Ceramic

Aluminium

Cast iron

Fibre reinforced plastic

35. The materials used for cylinder block are

Cast iron and aluminium alloy

Brass and steel

Steel and aluminium alloy

Cast iron and steel

36. The purpose of a cylinder head gasket is to

Prevent engine oil from going into combustion chamber

Removes impurities from cylinder head lubricating oil

Prevent the combustion gases from leaking from the joint between the cylinder block and the cylinder head

None of the above

37. When a gear box has four forward speeds and one reverse speed, it is said to be a

6-speed gear box

3-speed gear box

4-speed gear box

5-speed gear box

38. In which of the following conditions, the idle CO percentage should be measured with the vehicle?

Headlights are switched on

Headlights and other electrical devices are switched off

Headlights and other electrical devices are switched on

Headlights and other lights are switched off

39. The purpose of adding pigment to the paint is that it

Optimises the viscosity of paint

Gives colour and filling up effect to the paint

Makes paint film hard

None of the above

40. During suction stroke, the inside pressure of cylinder is

More than the atmospheric pressure

Less than the atmospheric pressure

Equal to the atmospheric pressure

None of these

Page 5 of 5

41. An oil filter bypass valve opens when the

Engine is cold

Engine runs at high speed

Oil filter becomes clogged

Engine overheats

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A Demrot is the founder of VideRime Online Learning, a leading engineering website. He did his BE Civil and M.Tech Structure from RGPV University, Bhopal and has been working as an Assistant Professor in a reputed college.

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creazione dell'account binance says:
February 13, 2026 at 11:48 am
Your point of view caught my eye and was very interesting. Thanks. I have a question for you.
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binance sign up says:
March 6, 2026 at 6:24 am
Can you be more specific about the content of your article? After reading it, I still have some doubts. Hope you can help me.
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