Automobile Engineering Practice Set-5

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1. Vulcanizing means

None of these

Heating rubber under pressure

Spraying with special paint

Melting rubber while stirring it

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

Toe

Camber

Caster

Steering gear ratio

3. 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

4. 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.

B.P/F.P.

I.P/B.P.

F.P/B.P.

5. The damper fluid leakage typically occur from

Coil spring mounting

Bottom of damper

Upper damper mounting

Clearance between inner and outer tubes of damper

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

Get better ride

Avoid ply separation

None of these

Equalize wear

7. The starting system includes

A battery, a distributor, and an ignition switch

A battery, a starter, and an ignition switch

A distributor, a starter, and an ignition switch

A battery, a starter, and a distributor

8. 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

9. Damper is also known as

Radius rod

Shock absorber

Torsion bar

Spring

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

More than the atmospheric pressure

Less than the atmospheric pressure

None of these

Equal to the atmospheric pressure

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

None of these

V6 engines

Two stroke I.C. engines

Four stroke I.C. engines

12. The material generally used for cylinder sleeves is

Ceramic

Cast iron

Fibre reinforced plastic

Aluminium

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

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

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

14. 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

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

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

In the fuel tank

Between the fuel filler pipe and fuel tank

On the distributor mounting in the engine compartment

On the engine compartment bulkhead

16. When turning a corner

All of the above

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

The front wheels are turning on different angles

The front wheels are toeing out

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

Distributor

Alternator pulley

Timing belt drive pulley

Radiator fan pulley

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

Tyre and the road surface

Wheel rim and road surface

None of these

Wheel rim and tyre

19. 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

20. 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 exhaust stroke

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

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

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21. 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

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

Warm up and lubricate the pump

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

Pressurise the fuel system before the engine is started

Enable the pump's fault diagnosis function to operate

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

24. An oil filter bypass valve opens when the

Engine runs at high speed

Engine overheats

Oil filter becomes clogged

Engine is cold

25. 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

26. Which of the following is not an automobile?

Motor cycle

Passenger car

Aeroplane

Truck

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, 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

28. A three way catalytic converter

Burns fuel vapour gases

Reduces N₂, H₂O, and CO₂ emission levels

Re-circulates exhaust gases

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

29. 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

None of the above

Removes impurities from cylinder head lubricating oil

30. Caster is a

(A) Forward tilt of the kingpin

(B) Backward tilt of the kingpin

(D) None of these

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31. A battery can be charged by

Applying a voltage in the same direction to that of charging

Applying voltage in the reverse direction to that of charging

Adding sulphuric acid

Adding distilled water

32. A laminated glass upon cracking

Bursts into sharp edged fragments

Breaks into the form of crystals

Sandwiched layer traps the fragments

Bursts into granular pieces

33. 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

34. The best fuels for compression ignition engines are

Branched chain paraffin

Straight chain paraffin

Naphthalene

Aromatics

35. The combustion process in a Diesel engine is a

Constant pressure process

Adiabatic process

Constant volume process

Constant temperature process

36. The materials used for cylinder block are

Brass and steel

Cast iron and aluminium alloy

Cast iron and steel

Steel and aluminium alloy

37. A front stabilizer bar is used to

All of the above

Control suspension movement and body roll

Provide a softer ride

Increase vehicle load carrying capacity

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

In the cross direction

In the lateral direction

Near the edges

Near the centre

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

Electronic control unit system

Magneto and electronic system

Magneto system

Battery system

40. The tyre rotation is generally done at

4000 km

6000 km

1000 km

10,000 km

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41. The included angle is the sum of the

Camber and toe in

Castor and S.A.I.

Camber and castor

Camber and S.A.I.

Automobile Engineering Practice Set-5

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