Automobile Engineering Practice Set-5

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

More than the atmospheric pressure

Equal to the atmospheric pressure

Less than the atmospheric pressure

None of these

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

Tyre and the road surface

None of these

Wheel rim and road surface

Wheel rim and tyre

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

Equalize wear

Avoid ply separation

None of these

Get better ride

4. Vulcanizing means

Spraying with special paint

None of these

Heating rubber under pressure

Melting rubber while stirring it

5. A laminated glass upon cracking

Bursts into granular pieces

Bursts into sharp edged fragments

Breaks into the form of crystals

Sandwiched layer traps the fragments

6. 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

7. The purpose of a cylinder head gasket is to

Prevent engine oil from going into combustion chamber

None of the above

Prevent the combustion gases from leaking from the joint between the cylinder block and the cylinder head

Removes impurities from cylinder head lubricating oil

8. The material generally used for cylinder sleeves is

Fibre reinforced plastic

Aluminium

Cast iron

Ceramic

9. 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

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

Four stroke I.C. engines

V6 engines

None of these

Two stroke I.C. engines

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11. 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.

F.P/B.P.

I.P/B.P.

12. A battery can be charged by

Applying a voltage in the same direction to that of charging

Adding sulphuric acid

Applying voltage in the reverse direction to that of charging

Adding distilled water

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

Near the edges

In the cross direction

Near the centre

In the lateral direction

14. Damper is also known as

Radius rod

Spring

Torsion bar

Shock absorber

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

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

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

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

Timing belt drive pulley

Alternator pulley

Radiator fan pulley

Distributor

17. Which of the following is not an automobile?

Truck

Aeroplane

Passenger car

Motor cycle

18. The materials used for cylinder block are

Cast iron and steel

Brass and steel

Steel and aluminium alloy

Cast iron and aluminium alloy

19. Caster is a

(D) None of these

(B) Backward tilt of the kingpin

(A) Forward tilt of the kingpin

20. The included angle is the sum of the

Castor and S.A.I.

Camber and toe in

Camber and S.A.I.

Camber and castor

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21. When turning a corner

The front wheels are turning on different angles

The front wheels are toeing out

All of the above

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

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

Battery system

Magneto system

Magneto and electronic system

Electronic control unit system

23. An oil filter bypass valve opens when the

Engine is cold

Engine runs at high speed

Oil filter becomes clogged

Engine overheats

24. 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

On the engine compartment bulkhead

In the fuel tank

25. The combustion process in a Diesel engine is a

Constant volume process

Constant pressure process

Constant temperature process

Adiabatic process

26. 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

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

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

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

Camber

Steering gear ratio

Toe

Caster

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

Optimises the viscosity of paint

Makes paint film hard

Gives colour and filling up effect to the paint

None of the above

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

3-speed gear box

6-speed gear box

4-speed gear box

5-speed gear box

30. A three way catalytic converter

Burns fuel vapour gases

Re-circulates exhaust gases

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

Reduces N₂, H₂O, and CO₂ emission levels

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31. The damper fluid leakage typically occur from

Upper damper mounting

Coil spring mounting

Bottom of damper

Clearance between inner and outer tubes of damper

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

Removes impurities from cylinder head lubricating oil

Turns oil into fine mist for spray lubrication

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

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

33. The tyre rotation is generally done at

6000 km

1000 km

4000 km

10,000 km

34. The best fuels for compression ignition engines are

Naphthalene

Aromatics

Branched chain paraffin

Straight chain paraffin

35. 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

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

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

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

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

Front 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

Stopping distance becomes extremely long

38. The order in which effort applied to the steering wheel is transferred to the front wheel is

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

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

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

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

39. The main function of a resonator is that it

Enhances intake efficiency

Reduces the intake air noise

Regulates the intake air temperature

Regulates the intake air flow rate

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

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 compression stroke

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

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41. 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

Automobile Engineering Practice Set-5

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