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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. During suction stroke, the inside pressure of cylinder is

Less than the atmospheric pressure

None of these

More than the atmospheric pressure

Equal to the atmospheric pressure

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

6-speed gear box

4-speed gear box

3-speed gear box

5-speed gear box

3. Damper is also known as

Spring

Radius rod

Shock absorber

Torsion bar

4. An oil filter bypass valve opens when the

Engine runs at high speed

Engine overheats

Oil filter becomes clogged

Engine is cold

5. The tyre rotation is generally done at

4000 km

1000 km

10,000 km

6000 km

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

In the fuel tank

On the engine compartment bulkhead

Between the fuel filler pipe and fuel tank

On the distributor mounting in the engine compartment

7. 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

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

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

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

Equalize wear

None of these

Get better ride

Avoid ply separation

9. The material generally used for cylinder sleeves is

Cast iron

Fibre reinforced plastic

Ceramic

Aluminium

10. Which of the following is not an automobile?

Truck

Aeroplane

Motor cycle

Passenger car

Page 2 of 5

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

Electronic control unit system

Magneto and electronic system

Magneto system

Battery system

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

Oil strainer, oil pump, 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 pump, oil strainer, 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

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

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

Removes impurities from cylinder head lubricating oil

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

Turns oil into fine mist for spray lubrication

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

Wheel rim and tyre

None of these

Wheel rim and road surface

Tyre and the road surface

15. The combustion process in a Diesel engine is a

Constant pressure process

Constant volume process

Adiabatic process

Constant temperature process

16. Caster is a

(C) Either 'A' or 'B'

(B) Backward tilt of the kingpin

(A) Forward tilt of the kingpin

(D) None of these

17. A laminated glass upon cracking

Breaks into the form of crystals

Sandwiched layer traps the fragments

Bursts into sharp edged fragments

Bursts into granular pieces

18. The best fuels for compression ignition engines are

Branched chain paraffin

Straight chain paraffin

Aromatics

Naphthalene

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

Caster

Toe

Steering gear ratio

Camber

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

Makes paint film hard

Gives colour and filling up effect to the paint

None of the above

Optimises the viscosity of paint

Page 3 of 5

21. When turning a corner

All of the above

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

The front wheels are toeing out

The front wheels are turning on different angles

22. A front stabilizer bar is used to

Increase vehicle load carrying capacity

Provide a softer ride

Control suspension movement and body roll

All of the above

23. The materials used for cylinder block are

Steel and aluminium alloy

Brass and steel

Cast iron and steel

Cast iron and aluminium alloy

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

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

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

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

V6 engines

Two stroke I.C. engines

Four stroke I.C. engines

None of these

26. The starting system includes

A battery, a starter, and an ignition switch

A distributor, a starter, and an ignition switch

A battery, a distributor, and an ignition switch

A battery, a starter, and a distributor

27. The main function of a resonator is that it

Reduces the intake air noise

Enhances intake efficiency

Regulates the intake air temperature

Regulates the intake air flow rate

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

Alternator pulley

Timing belt drive pulley

Distributor

Radiator fan pulley

29. A three way catalytic converter

Reduces N₂, H₂O, and CO₂ emission levels

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

Burns fuel vapour gases

Re-circulates exhaust gases

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

Headlights and other lights are switched off

Headlights are switched on

Headlights and other electrical devices are switched off

Headlights and other electrical devices are switched on

Page 4 of 5

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

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

Stopping distance becomes extremely long

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

32. 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

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

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

33. The damper fluid leakage typically occur from

Coil spring mounting

Bottom of damper

Clearance between inner and outer tubes of damper

Upper damper mounting

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

In the cross direction

Near the edges

In the lateral direction

Near the centre

35. The purpose of a cylinder head gasket is to

Prevent engine oil from going into combustion chamber

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

Removes impurities from cylinder head lubricating oil

None of the above

36. The included angle is the sum of the

Camber and castor

Camber and toe in

Camber and S.A.I.

Castor and S.A.I.

37. 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)

B.P/I.P.

F.P/B.P.

B.P/F.P.

I.P/B.P.

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

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

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

39. Vulcanizing means

None of these

Spraying with special paint

Heating rubber under pressure

Melting rubber while stirring it

40. 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

Enable the pump's fault diagnosis function to operate

Warm up and lubricate the pump

Page 5 of 5

41. 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

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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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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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