Automobile Engineering Practice Set-5

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1. A three way catalytic converter

Re-circulates exhaust gases

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

Burns fuel vapour gases

Reduces N₂, H₂O, and CO₂ emission levels

2. Vulcanizing means

Spraying with special paint

Melting rubber while stirring it

Heating rubber under pressure

None of these

3. The combustion process in a Diesel engine is a

Constant pressure process

Constant volume process

Constant temperature process

Adiabatic process

4. The material generally used for cylinder sleeves is

Aluminium

Ceramic

Fibre reinforced plastic

Cast iron

5. 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

Pressurise the fuel system before the engine is started

Warm up and lubricate the pump

Enable the pump's fault diagnosis function to operate

6. 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 off

Headlights and other lights are switched off

Headlights and other electrical devices are switched on

7. 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

8. Which of the following is not an automobile?

Passenger car

Motor cycle

Truck

Aeroplane

9. The tyre rotation is generally done at

10,000 km

6000 km

4000 km

1000 km

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

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

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

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

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

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11. 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

12. 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

13. 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

14. 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.

15. Caster is a

(D) None of these

(A) Forward tilt of the kingpin

(B) Backward tilt of the kingpin

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

Optimises the viscosity of paint

None of the above

Gives colour and filling up effect to the paint

Makes paint film hard

17. The included angle is the sum of the

Camber and toe in

Camber and S.A.I.

Castor and S.A.I.

Camber and castor

18. 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

19. 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

20. 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

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

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

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 rear brakes than on the front brakes when the fluid pressure exceeds a predetermined level

22. The damper fluid leakage typically occur from

Upper damper mounting

Coil spring mounting

Clearance between inner and outer tubes of damper

Bottom of damper

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

Recharging of a maintenance free battery is neither required nor possible

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

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

Near the edges

In the lateral direction

Near the centre

In the cross direction

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

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

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

Distributor

Timing belt drive pulley

Radiator fan pulley

Alternator pulley

27. The materials used for cylinder block are

Steel and aluminium alloy

Cast iron and aluminium alloy

Brass and steel

Cast iron and steel

28. Damper is also known as

Torsion bar

Shock absorber

Spring

Radius rod

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

Two stroke I.C. engines

None of these

V6 engines

Four stroke I.C. engines

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

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

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

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

Magneto and electronic system

Magneto system

Battery system

Electronic control unit system

32. A front stabilizer bar is used to

Increase vehicle load carrying capacity

Control suspension movement and body roll

All of the above

Provide a softer ride

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

Caster

Steering gear ratio

Camber

Toe

34. 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

Turns oil into fine mist for spray lubrication

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

35. The main function of a resonator is that it

Reduces the intake air noise

Regulates the intake air temperature

Regulates the intake air flow rate

Enhances intake efficiency

36. The starting system includes

A distributor, a starter, and an ignition switch

A battery, a starter, and a distributor

A battery, a distributor, and an ignition switch

A battery, a starter, and an ignition switch

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

Get better ride

Equalize wear

Avoid ply separation

None of these

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

5-speed gear box

6-speed gear box

3-speed gear box

4-speed gear box

39. An oil filter bypass valve opens when the

Engine overheats

Engine runs at high speed

Engine is cold

Oil filter becomes clogged

40. 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

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41. The best fuels for compression ignition engines are

Naphthalene

Aromatics

Branched chain paraffin

Straight chain paraffin

Automobile Engineering Practice Set-5

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