Automobile Engineering Practice Set-5

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1. A battery can be charged by

Adding sulphuric acid

Applying voltage in the reverse direction to that of charging

Applying a voltage in the same direction to that of charging

Adding distilled water

2. 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

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

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

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

On the distributor mounting in the engine compartment

On the engine compartment bulkhead

In the fuel tank

Between the fuel filler pipe and fuel tank

4. Damper is also known as

Spring

Shock absorber

Torsion bar

Radius rod

5. 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

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

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

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

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

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

Camber

Steering gear ratio

Caster

Toe

8. 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

9. 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

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

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

Equal to the atmospheric pressure

Less than the atmospheric pressure

None of these

More than the atmospheric pressure

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11. 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

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

Warm up and lubricate the pump

Pressurise the fuel system before the engine is started

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

Timing belt drive pulley

Radiator fan pulley

Distributor

Alternator pulley

13. A three way catalytic converter

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

Reduces N₂, H₂O, and CO₂ emission levels

Burns fuel vapour gases

Re-circulates exhaust gases

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

None of these

Avoid ply separation

Equalize wear

Get better ride

15. An oil filter bypass valve opens when the

Engine is cold

Engine runs at high speed

Engine overheats

Oil filter becomes clogged

16. The materials used for cylinder block are

Cast iron and steel

Cast iron and aluminium alloy

Steel and aluminium alloy

Brass and steel

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

Near the centre

In the lateral direction

Near the edges

In the cross direction

18. Caster is a

(A) Forward tilt of the kingpin

(B) Backward tilt of the kingpin

(D) None of these

19. When turning a corner

All of the above

The front wheels are turning on different angles

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

The front wheels are toeing out

20. The material generally used for cylinder sleeves is

Fibre reinforced plastic

Cast iron

Aluminium

Ceramic

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21. A front stabilizer bar is used to

Provide a softer ride

Control suspension movement and body roll

All of the above

Increase vehicle load carrying capacity

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

V6 engines

None of these

Two stroke I.C. engines

Four stroke I.C. engines

23. The included angle is the sum of the

Camber and toe in

Camber and S.A.I.

Camber and castor

Castor and S.A.I.

24. Which of the following is not an automobile?

Truck

Aeroplane

Passenger car

Motor cycle

25. The damper fluid leakage typically occur from

Upper damper mounting

Coil spring mounting

Bottom of damper

Clearance between inner and outer tubes of damper

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

Turns oil into fine mist for spray lubrication

Removes impurities from cylinder head lubricating oil

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

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

27. 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, tie rod, steering gearbox, steering shaft, steering knuckle, 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

28. Vulcanizing means

Heating rubber under pressure

Spraying with special paint

Melting rubber while stirring it

None of these

29. The best fuels for compression ignition engines are

Branched chain paraffin

Naphthalene

Straight chain paraffin

Aromatics

30. The combustion process in a Diesel engine is a

Constant temperature process

Constant volume process

Constant pressure process

Adiabatic process

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31. The starting system includes

A battery, a starter, and a distributor

A battery, a distributor, and an ignition switch

A battery, a starter, and an ignition switch

A distributor, a starter, and an ignition switch

32. 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

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

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

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

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

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

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

Tyre and the road surface

Wheel rim and road surface

Wheel rim and tyre

None of these

35. 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

4-speed gear box

6-speed gear box

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

None of the above

Optimises the viscosity of paint

Makes paint film hard

Gives colour and filling up effect to the paint

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)

I.P/B.P.

B.P/F.P.

F.P/B.P.

B.P/I.P.

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

Battery system

Magneto system

Magneto and electronic system

Electronic control unit system

39. 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

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

Headlights are switched on

Headlights and other lights are switched off

Headlights and other electrical devices are switched off

Headlights and other electrical devices are switched on

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41. The tyre rotation is generally done at

10,000 km

1000 km

6000 km

4000 km

Automobile Engineering Practice Set-5

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