Automobile Engineering Practice Set-5

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1. When turning a corner

The front wheels are toeing out

All of the above

The front wheels are turning on different angles

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

2. The included angle is the sum of the

Camber and toe in

Camber and castor

Camber and S.A.I.

Castor and S.A.I.

3. The materials used for cylinder block are

Steel and aluminium alloy

Cast iron and aluminium alloy

Brass and steel

Cast iron and steel

4. Vulcanizing means

Melting rubber while stirring it

Heating rubber under pressure

None of these

Spraying with special paint

5. 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

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

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

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

None of these

Equalize wear

Get better ride

Avoid ply separation

7. Damper is also known as

Spring

Radius rod

Shock absorber

Torsion bar

8. The tyre rotation is generally done at

10,000 km

6000 km

4000 km

1000 km

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

Two stroke I.C. engines

V6 engines

Four stroke I.C. engines

None of these

10. Which of the following is not an automobile?

Aeroplane

Passenger car

Motor cycle

Truck

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11. The material generally used for cylinder sleeves is

Ceramic

Fibre reinforced plastic

Cast iron

Aluminium

12. 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

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

Less than the atmospheric pressure

More than the atmospheric pressure

Equal to the atmospheric pressure

None of these

14. A front stabilizer bar is used to

Increase vehicle load carrying capacity

Provide a softer ride

Control suspension movement and body roll

All of the above

15. An oil filter bypass valve opens when the

Oil filter becomes clogged

Engine runs at high speed

Engine overheats

Engine is cold

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

Removes impurities from cylinder head lubricating oil

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

Turns oil into fine mist for spray lubrication

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

17. The purpose of a cylinder head gasket is to

None of the above

Prevent engine oil from going into combustion chamber

Removes impurities from cylinder head lubricating oil

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

18. The main function of a resonator is that it

Regulates the intake air flow rate

Enhances intake efficiency

Reduces the intake air noise

Regulates the intake air temperature

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

On the distributor mounting in the engine compartment

In the fuel tank

Between the fuel filler pipe and fuel tank

On the engine compartment bulkhead

20. The combustion process in a Diesel engine is a

Adiabatic process

Constant pressure process

Constant temperature process

Constant volume process

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21. 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/F.P.

F.P/B.P.

I.P/B.P.

B.P/I.P.

22. A laminated glass upon cracking

Bursts into granular pieces

Bursts into sharp edged fragments

Sandwiched layer traps the fragments

Breaks into the form of crystals

23. The best fuels for compression ignition engines are

Aromatics

Straight chain paraffin

Branched chain paraffin

Naphthalene

24. Caster is a

(B) Backward tilt of the kingpin

(D) None of these

(A) Forward tilt of the kingpin

25. 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

Warm up and lubricate the pump

Enable the pump's fault diagnosis function to operate

Pressurise the fuel system before the engine is started

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

3-speed gear box

4-speed gear box

5-speed gear box

6-speed gear box

27. The starting system includes

A battery, a distributor, and an ignition switch

A battery, a starter, and a distributor

A battery, a starter, and an ignition switch

A distributor, a starter, and an ignition switch

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

Headlights and other lights are switched off

Headlights are switched on

Headlights and other electrical devices are switched on

Headlights and other electrical devices are switched off

29. 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

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 has a relatively short shelf life when compared with standard batteries

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

Makes paint film hard

Gives colour and filling up effect to the paint

None of the above

Optimises the viscosity of paint

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31. A battery can be charged by

Applying voltage in the reverse direction to that of charging

Adding sulphuric acid

Adding distilled water

Applying a voltage in the same direction to that of charging

32. A three way catalytic converter

Re-circulates exhaust gases

Reduces N₂, H₂O, and CO₂ emission levels

Burns fuel vapour gases

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

33. 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

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

Approaching 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

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

35. 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, steering knuckle, tie rod, front wheels

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

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

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

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

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

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

Electronic control unit system

Battery system

Magneto system

Magneto and electronic system

38. The damper fluid leakage typically occur from

Clearance between inner and outer tubes of damper

Upper damper mounting

Coil spring mounting

Bottom of damper

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

In the lateral direction

In the cross direction

Near the centre

Near the edges

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

Distributor

Alternator pulley

Timing belt drive pulley

Radiator fan pulley

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

Camber

Caster

Toe

Steering gear ratio

Automobile Engineering Practice Set-5

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