Automobile Engineering Practice Set-5

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1. 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

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

Radiator fan pulley

Timing belt drive pulley

Alternator pulley

Distributor

3. The combustion process in a Diesel engine is a

Constant volume process

Constant temperature process

Constant pressure process

Adiabatic process

4. Which of the following is not an automobile?

Truck

Aeroplane

Motor cycle

Passenger car

5. A battery can be charged by

Adding sulphuric acid

Adding distilled water

Applying a voltage in the same direction to that of charging

Applying voltage in the reverse direction to that of charging

6. 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

Prevent engine oil from going into combustion chamber

Removes impurities from cylinder head lubricating oil

None of the above

7. 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

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

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

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

Approaching 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

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

Electronic control unit system

Magneto and electronic system

Battery system

Magneto system

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

Two stroke I.C. engines

Four stroke I.C. engines

None of these

V6 engines

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

Between the fuel filler pipe and fuel tank

In the fuel tank

On the engine compartment bulkhead

On the distributor mounting in the engine compartment

12. 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

13. The damper fluid leakage typically occur from

Coil spring mounting

Clearance between inner and outer tubes of damper

Upper damper mounting

Bottom of damper

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

In the cross direction

In the lateral direction

Near the centre

Near the edges

15. The tyre rotation is generally done at

1000 km

4000 km

10,000 km

6000 km

16. An oil filter bypass valve opens when the

Engine runs at high speed

Oil filter becomes clogged

Engine is cold

Engine overheats

17. The best fuels for compression ignition engines are

Naphthalene

Branched chain paraffin

Aromatics

Straight chain paraffin

18. 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/F.P.

B.P/I.P.

I.P/B.P.

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

None of the above

Makes paint film hard

Gives colour and filling up effect to the paint

Optimises the viscosity of paint

20. 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 block, cylinder head and oil pan

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

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

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21. The starting system includes

A distributor, a starter, and an ignition switch

A battery, a distributor, and an ignition switch

A battery, a starter, and a distributor

A battery, a starter, and an ignition switch

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

5-speed gear box

3-speed gear box

6-speed gear box

4-speed gear box

23. The material generally used for cylinder sleeves is

Cast iron

Ceramic

Fibre reinforced plastic

Aluminium

24. When turning a corner

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

All of the above

The front wheels are turning on different angles

The front wheels are toeing out

25. 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

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

Tyre and the road surface

Wheel rim and tyre

None of these

Wheel rim and road surface

27. 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

28. The materials used for cylinder block are

Cast iron and steel

Brass and steel

Steel and aluminium alloy

Cast iron and aluminium alloy

29. 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

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

30. 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

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31. 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

32. Damper is also known as

Torsion bar

Shock absorber

Spring

Radius rod

33. The included angle is the sum of the

Castor and S.A.I.

Camber and toe in

Camber and castor

Camber and S.A.I.

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

Steering gear ratio

Toe

Caster

Camber

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

Equalize wear

Get better ride

None of these

Avoid ply separation

36. A laminated glass upon cracking

Breaks into the form of crystals

Bursts into sharp edged fragments

Bursts into granular pieces

Sandwiched layer traps the fragments

37. Caster is a

(B) Backward tilt of the kingpin

(A) Forward tilt of the kingpin

(D) None of these

38. 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

39. 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

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

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

40. A three way catalytic converter

Re-circulates exhaust gases

Burns fuel vapour gases

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

Reduces N₂, H₂O, and CO₂ emission levels

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41. Vulcanizing means

Spraying with special paint

Heating rubber under pressure

None of these

Melting rubber while stirring it

Automobile Engineering Practice Set-5

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