Automobile Engineering Practice Set-5

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1. Damper is also known as

Shock absorber

Radius rod

Torsion bar

Spring

2. The purpose of a cylinder head gasket is to

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

Removes impurities from cylinder head lubricating oil

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

In the cross direction

In the lateral direction

Near the centre

Near the edges

4. The included angle is the sum of the

Camber and toe in

Castor and S.A.I.

Camber and S.A.I.

Camber and castor

5. A three way catalytic converter

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

Burns fuel vapour gases

Re-circulates exhaust gases

Reduces N₂, H₂O, and CO₂ emission levels

6. 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)

F.P/B.P.

B.P/F.P.

B.P/I.P.

I.P/B.P.

7. Vulcanizing means

Heating rubber under pressure

Melting rubber while stirring it

None of these

Spraying with special paint

8. A laminated glass upon cracking

Sandwiched layer traps the fragments

Bursts into sharp edged fragments

Bursts into granular pieces

Breaks into the form of crystals

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

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

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

Headlights and other lights are switched off

Headlights and other electrical devices are switched off

Headlights and other electrical devices are switched on

Headlights are switched on

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11. A battery can be charged by

Applying voltage in the reverse direction to that of charging

Applying a voltage in the same direction to that of charging

Adding sulphuric acid

Adding distilled water

12. The starting system includes

A battery, a starter, and a distributor

A battery, a starter, and an ignition switch

A distributor, a starter, and an ignition switch

A battery, a distributor, and an ignition switch

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

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

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

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

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

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

Distributor

Timing belt drive pulley

Radiator fan pulley

Alternator pulley

15. An oil filter bypass valve opens when the

Engine runs at high speed

Engine is cold

Engine overheats

Oil filter becomes clogged

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

In the fuel tank

On the distributor mounting in the engine compartment

Between the fuel filler pipe and fuel tank

On the engine compartment bulkhead

17. The tyre rotation is generally done at

10,000 km

1000 km

6000 km

4000 km

18. The materials used for cylinder block are

Cast iron and aluminium alloy

Steel and aluminium alloy

Cast iron and steel

Brass and steel

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

None of the above

Gives colour and filling up effect to the paint

Optimises the viscosity of paint

Makes paint film hard

20. 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

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21. 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

22. 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

23. Which of the following is not an automobile?

Passenger car

Motor cycle

Truck

Aeroplane

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

Camber

Steering gear ratio

Toe

Caster

25. The damper fluid leakage typically occur from

Bottom of damper

Upper damper mounting

Coil spring mounting

Clearance between inner and outer tubes of damper

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

Pressurise the fuel system before the engine is started

Enable the pump's fault diagnosis function to operate

Warm up and lubricate the pump

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

27. The material generally used for cylinder sleeves is

Fibre reinforced plastic

Aluminium

Ceramic

Cast iron

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

Battery system

Magneto system

Magneto and electronic system

Electronic control unit system

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

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

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

30. The best fuels for compression ignition engines are

Straight chain paraffin

Branched chain paraffin

Naphthalene

Aromatics

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

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

Rear 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

32. Caster is a

(D) None of these

(A) Forward tilt of the kingpin

(B) Backward tilt of the kingpin

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 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

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

34. When turning a corner

The front wheels are toeing out

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

All of the above

The front wheels are turning on different angles

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

Avoid ply separation

Get better ride

Equalize wear

None of these

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

6-speed gear box

3-speed gear box

4-speed gear box

5-speed gear box

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

None of these

Tyre and the road surface

Wheel rim and road surface

Wheel rim and tyre

38. The combustion process in a Diesel engine is a

Constant pressure process

Adiabatic process

Constant temperature process

Constant volume process

39. 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

40. 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 has a relatively short shelf life when compared with standard batteries

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

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41. 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

Automobile Engineering Practice Set-5

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