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Automobile Engineering MCQs
2

Automobile Engineering Practice Set-5

May 6, 2021

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Page 1 of 5

1. The best fuels for compression ignition engines are

Naphthalene

Branched chain paraffin

Straight chain paraffin

Aromatics

2. Which of the following is not an automobile?

Motor cycle

Aeroplane

Passenger car

Truck

3. 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.

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

V6 engines

None of these

Four stroke I.C. engines

Two stroke I.C. engines

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

Near the centre

Near the edges

In the cross direction

In the lateral direction

6. 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

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

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

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

More than the atmospheric pressure

Equal to the atmospheric pressure

None of these

Less than the atmospheric pressure

8. 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

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

Avoid ply separation

Equalize wear

Get better ride

None of these

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

Pressurise the fuel system before the engine is started

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

Warm up and lubricate the pump

Enable the pump's fault diagnosis function to operate

Page 2 of 5

11. The main function of a resonator is that it

Regulates the intake air flow rate

Reduces the intake air noise

Regulates the intake air temperature

Enhances intake efficiency

12. When turning a corner

The front wheels are toeing out

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

The front wheels are turning on different angles

All of the above

13. A laminated glass upon cracking

Sandwiched layer traps the fragments

Bursts into granular pieces

Breaks into the form of crystals

Bursts into sharp edged fragments

14. Vulcanizing means

Melting rubber while stirring it

Spraying with special paint

None of these

Heating rubber under pressure

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

Approaching 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

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

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

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

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

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

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

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

Camber

Toe

Steering gear ratio

Caster

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

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

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

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

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

19. The damper fluid leakage typically occur from

Upper damper mounting

Coil spring mounting

Bottom of damper

Clearance between inner and outer tubes of damper

20. An oil filter bypass valve opens when the

Engine is cold

Engine runs at high speed

Oil filter becomes clogged

Engine overheats

Page 3 of 5

21. 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 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

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

22. The combustion process in a Diesel engine is a

Constant temperature process

Constant volume process

Adiabatic process

Constant pressure process

23. A battery can be charged by

Applying a voltage in the same direction to that of charging

Adding distilled water

Applying voltage in the reverse direction to that of charging

Adding sulphuric acid

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

5-speed gear box

6-speed gear box

4-speed gear box

3-speed gear box

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

Headlights and other electrical devices are switched on

Headlights and other lights are switched off

Headlights and other electrical devices are switched off

Headlights are switched on

26. A three way catalytic converter

Re-circulates exhaust gases

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

Reduces N₂, H₂O, and CO₂ emission levels

Burns fuel vapour gases

27. Damper is also known as

Shock absorber

Spring

Torsion bar

Radius rod

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

Removes impurities from cylinder head lubricating oil

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

Turns oil into fine mist for spray lubrication

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

29. The starting system includes

A battery, a distributor, and an ignition switch

A distributor, a starter, and an ignition switch

A battery, a starter, and a distributor

A battery, a starter, and an ignition switch

30. The material generally used for cylinder sleeves is

Ceramic

Aluminium

Fibre reinforced plastic

Cast iron

Page 4 of 5

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

None of these

Wheel rim and road surface

Tyre and the road surface

Wheel rim and tyre

32. The included angle is the sum of the

Castor and S.A.I.

Camber and castor

Camber and S.A.I.

Camber and toe in

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

Magneto system

Magneto and electronic system

Battery system

Electronic control unit system

34. 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

35. The materials used for cylinder block are

Steel and aluminium alloy

Cast iron and aluminium alloy

Brass and steel

Cast iron and steel

36. 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

In the fuel tank

On the distributor mounting in the engine compartment

37. 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

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

Stopping distance becomes extremely long

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

38. The purpose of a cylinder head gasket is to

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

Removes impurities from cylinder head lubricating oil

Prevent engine oil from going into combustion chamber

None of the above

39. The tyre rotation is generally done at

6000 km

1000 km

10,000 km

4000 km

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

Alternator pulley

Distributor

Timing belt drive pulley

Radiator fan pulley

Page 5 of 5

41. Caster is a

(A) Forward tilt of the kingpin

(D) None of these

(C) Either 'A' or 'B'

(B) Backward tilt of the kingpin

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Tags: Automobile Automobile Engineering MCQs Engineering Mechanical Engineering

VideRime

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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