Automobile Engineering Practice Set-5

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

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

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 has a relatively short shelf life when compared with standard batteries

2. A front stabilizer bar is used to

Increase vehicle load carrying capacity

Control suspension movement and body roll

Provide a softer ride

All of the above

3. The combustion process in a Diesel engine is a

Constant temperature process

Constant volume process

Adiabatic process

Constant pressure process

4. 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

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

Avoid ply separation

Get better ride

Equalize wear

None of these

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

Gives colour and filling up effect to the paint

Optimises the viscosity of paint

Makes paint film hard

None of the above

7. The included angle is the sum of the

Camber and S.A.I.

Castor and S.A.I.

Camber and castor

Camber and toe in

8. When turning a corner

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

All of the above

The front wheels are toeing out

The front wheels are turning on different angles

9. The tyre rotation is generally done at

10,000 km

1000 km

6000 km

4000 km

10. Which of the following is not an automobile?

Truck

Motor cycle

Passenger car

Aeroplane

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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

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

12. The starting system includes

A battery, a starter, and a distributor

A distributor, a starter, and an ignition switch

A battery, a starter, and an ignition switch

A battery, a distributor, and an ignition switch

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

Near the edges

In the cross direction

In the lateral direction

Near the centre

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

Turns oil into fine mist for spray lubrication

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

Removes impurities from cylinder head lubricating oil

15. The purpose of a cylinder head gasket is to

Removes impurities from cylinder head lubricating oil

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

None of the above

Prevent engine oil from going into combustion chamber

16. An oil filter bypass valve opens when the

Engine overheats

Engine runs at high speed

Oil filter becomes clogged

Engine is cold

17. 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

18. The material generally used for cylinder sleeves is

Fibre reinforced plastic

Aluminium

Ceramic

Cast iron

19. A three way catalytic converter

Burns fuel vapour gases

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

Re-circulates exhaust gases

Reduces N₂, H₂O, and CO₂ emission levels

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

Electronic control unit system

Battery system

Magneto system

Magneto and electronic system

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

On the distributor mounting in the engine compartment

Between the fuel filler pipe and fuel tank

On the engine compartment bulkhead

In the fuel tank

22. 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 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, tie rod, steering knuckle, front wheels

23. Vulcanizing means

Spraying with special paint

Heating rubber under pressure

None of these

Melting rubber while stirring it

24. Damper is also known as

Spring

Torsion bar

Shock absorber

Radius rod

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

Alternator pulley

Timing belt drive pulley

Radiator fan pulley

Distributor

26. 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

27. The best fuels for compression ignition engines are

Branched chain paraffin

Naphthalene

Straight chain paraffin

Aromatics

28. The materials used for cylinder block are

Brass and steel

Cast iron and steel

Cast iron and aluminium alloy

Steel and aluminium alloy

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

6-speed gear box

4-speed gear box

5-speed gear box

3-speed gear box

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

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31. 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.

32. 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

33. 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

34. A laminated glass upon cracking

Sandwiched layer traps the fragments

Breaks into the form of crystals

Bursts into granular pieces

Bursts into sharp edged fragments

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

None of these

Wheel rim and road surface

Tyre and the road surface

Wheel rim and tyre

36. The damper fluid leakage typically occur from

Coil spring mounting

Bottom of damper

Upper damper mounting

Clearance between inner and outer tubes of damper

37. The main function of a resonator is that it

Enhances intake efficiency

Regulates the intake air temperature

Reduces the intake air noise

Regulates the intake air flow rate

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

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

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

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

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

39. Caster is a

(B) Backward tilt of the kingpin

(D) None of these

(A) Forward tilt of the kingpin

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

Steering gear ratio

Toe

Caster

Camber

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41. A battery can be charged by

Adding sulphuric acid

Applying voltage in the reverse direction to that of charging

Adding distilled water

Applying a voltage in the same direction to that of charging

Automobile Engineering Practice Set-5

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