Automobile Engineering Practice Set-5

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

Near the edges

Near the centre

In the cross direction

In the lateral direction

2. An oil filter bypass valve opens when the

Engine overheats

Engine is cold

Oil filter becomes clogged

Engine runs at high speed

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

Between the fuel filler pipe and fuel tank

On the distributor mounting in the engine compartment

In the fuel tank

On the engine compartment bulkhead

4. Vulcanizing means

Melting rubber while stirring it

None of these

Heating rubber under pressure

Spraying with special paint

5. A laminated glass upon cracking

Sandwiched layer traps the fragments

Breaks into the form of crystals

Bursts into sharp edged fragments

Bursts into granular pieces

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

More than the atmospheric pressure

None of these

Less than the atmospheric pressure

Equal to the atmospheric pressure

7. The main function of a resonator is that it

Reduces the intake air noise

Enhances intake efficiency

Regulates the intake air flow rate

Regulates the intake air temperature

8. Damper is also known as

Spring

Torsion bar

Shock absorber

Radius rod

9. 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 distilled water

Adding sulphuric acid

10. 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 on

Headlights and other lights are switched off

Headlights and other electrical devices are switched off

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11. A three way catalytic converter

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

Re-circulates exhaust gases

Burns fuel vapour gases

Reduces N₂, H₂O, and CO₂ emission levels

12. 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)

I.P/B.P.

B.P/I.P.

F.P/B.P.

B.P/F.P.

13. Caster is a

(D) None of these

(B) Backward tilt of the kingpin

(A) Forward tilt of the kingpin

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

Wheel rim and tyre

Tyre and the road surface

Wheel rim and road surface

None of these

15. 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

16. When turning a corner

All of the above

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

17. 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 pump, relief valve, oil filter, cylinder head, cylinder block and oil pan

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

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

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

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

19. A front stabilizer bar is used to

Control suspension movement and body roll

Provide a softer ride

All of the above

Increase vehicle load carrying capacity

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

Radiator fan pulley

Timing belt drive pulley

Distributor

Alternator pulley

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21. The damper fluid leakage typically occur from

Coil spring mounting

Upper damper mounting

Bottom of damper

Clearance between inner and outer tubes of damper

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

Get better ride

None of these

Equalize wear

Avoid ply separation

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

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

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

Stopping distance becomes extremely long

24. 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

25. 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

26. The combustion process in a Diesel engine is a

Constant volume process

Adiabatic process

Constant pressure process

Constant temperature process

27. The best fuels for compression ignition engines are

Naphthalene

Aromatics

Straight chain paraffin

Branched chain paraffin

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

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

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

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

Electronic control unit system

Battery system

Magneto and electronic system

Magneto system

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

Toe

Steering gear ratio

Camber

Caster

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

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

Pressurise the fuel system before the engine is started

32. The materials used for cylinder block are

Cast iron and steel

Steel and aluminium alloy

Cast iron and aluminium alloy

Brass and steel

33. 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

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

Gives colour and filling up effect to the paint

Makes paint film hard

None of the above

Optimises the viscosity of paint

35. 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

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

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

Recharging of a maintenance free battery is neither required nor possible

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

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

37. The included angle is the sum of the

Camber and S.A.I.

Camber and castor

Castor and S.A.I.

Camber and toe in

38. The tyre rotation is generally done at

1000 km

10,000 km

6000 km

4000 km

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

3-speed gear box

5-speed gear box

6-speed gear box

4-speed gear box

40. Which of the following is not an automobile?

Motor cycle

Truck

Passenger car

Aeroplane

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41. The material generally used for cylinder sleeves is

Ceramic

Fibre reinforced plastic

Aluminium

Cast iron

Automobile Engineering Practice Set-5

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