Automobile MCQ – Stuffworking.com

Automobile MCQ 11

Team Stuffworking — Fri, 05 Jun 2020 18:33:28 +0000

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1. In Diesel engines, the duration between the time of injection and the time of ignition is called

delay period

injection period

spill cut-off

ignition period

2. In a single dry plate clutch, torsional vibrations are absorbed by

cushion springs

coil springs known as torsional springs

clutch pedal

central hub

3. In an engine, the temperature of the piston will be more at the

piston rings

skirt of the piston

crown of the piston

piston walls

4. An over-inflated tyre will wear the tread most near the

none of these

corners

edges

centre

5. Cushioning springs in clutch plate reduces

torsional vibrations

vehicle speed

none of these

jerky starts

6. In a four stroke engine for each crankshaft revolution, the camshaft revolves

two turns

one turn

one-half turn

four turns

7. If a tyre is designated as 175/65 R14 82 S, then the aspect ratio for the tyre is

175

8. The valve tappet clearance is measured by

feeler gauge

vernier caliper

screw gauge

engineering scale

9. The specific gravity of petrol is about

0.95

0.75

0.85

1.25

10. The clutch is located between the transmission and the

rear axle

engine

propeller shaft

differential

11. In Diesel engines, during suction stroke, __________ is drawn in the cylinder.

air and fuel

only air

none of these

only fuel

12. The function of a governor in automobiles is to

limit the vehicle speed

maintain constant engine speed

maximise the fuel economy

limit the power

13. The advantage of the fuel injection system over the carburetor system is

all of these

improved emission

improved fuel efficiency

improved power output

14. The component of the oil filter that prevents the passage of metal particles and sludge is

element

relief valve

case

check valve

15. The engine oil viscosity is defined by __________ ratings.

gross vehicle weight (GVW)

American petroleum institute (API)

society of automotive engineers (SAE)

automatic transmission fluid (ATF)

16. The function of a connecting rod is

to turn the flywheel

to transmit motion of the piston to the crankshaft

to drive the fuel pump

to drive the drive plate

17. In a Diesel engine, the fuel is ignited by

the hot exhaust

none of these

the heat of compression

an electric spark

18. The engine oil level should be checked

while the engine is running

a few minutes after the ignition switch is turned off

while the engine is running at high-idle speed

immediately after the ignition switch is turned off

19. In a four cylinder in-line engine, the number of firing strokes in one revolution of the crank is

20. In a forced feed lubrication system, the device used to guard against excessive oil pressure, is known as

reducing valve

relief valve

check valve

release chamber

Automobile MCQ 11

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Automobile MCQ 10

Team Stuffworking — Fri, 05 Jun 2020 18:28:47 +0000

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1. The instrument used to check specific gravity of acid in a battery is

hygrometer

hydrometer

multimeter

anemometer

2. The material generally used for cylinder sleeves is

fibre reinforced plastic

cast iron

aluminium

ceremic

3. When turning a corner,

all of the above

the front wheels are toeing out

the front wheels are turning on different angles

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

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

tyre and the road surface

wheel rim and road surface

wheel rim and tyre

none of these

5. The Diesel engine works on

Diesel cycle

Otto cycle

Carnot cycle

Rankine cycle

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

4-speed gear box

6-speed gear box

5-speed gear box

3-speed gear box

7. The basic purpose of providing caster angle on wheels is to

compensate for wear in the steering linkage

prevent uneven tyre wear

bring the road contact of the tyre under the point of load

maintain directional control

8. When the piston is at T.D.C, the volume above the piston in the combustion chamber is the

none of these

exhaust volume

cylinder volume

clearance volume

9. The main cause for the change in engine oil viscosity is

vibration

temperature

contamination

humidity

10. The problems caused by the wheel imbalance are

hard steering and hard ride

poor acceleration and reduced fuel efficiency

steering wheel vibrations and uneven tyre wear

poor acceleration and hard steering

11. The forced-fed lubrication system means that the oil is delivered to the engine by

splashing action of the crankshaft

gravity

the pressure created by the oil pump

none of these

12. The connecting rod connects the piston and the

cylinder head

camshaft

cylinder block

crankshaft

13. The commonly used antifreeze solution in automobiles is

freon-12

ethylene glycol

carbon disulphide

ammonium chloride

14. The indicated power of a four-stroke engine (in watts) is equal to (where P = Mean effective pressure in N/m², L = Length of stroke in metres, A = Cross-sectional area of the piston in m², and N = Speed of the engine in revolutions per second (r.p.s))

P.L.A.N

P.L.A.N/4

2 x P.L.A.N

P.L.A.N/2

15. The Diesel engines are also known as

steam engines

none of these

spark ignition (S.I.) engines

compression ignition (C.I.) engines

16. The specific gravity of acid in a fully charged battery is generally

2.81

1.82

1.28

1.00

17. The gear shift lever requires two separate motions to shift gears, and the first movement

meshes the gears

selects the synchronizer

moves the synchronizer

operates the clutch

18. Which of the following oil is more viscous ?

SAE 70

SAE 40

SAE 80

SAE 30

19. Odometer is an instrument used for measurement of

fuel consumption

engine r.p.m.

power

distance

20. The compression ratio in Diesel engines is ______ the petrol engine.

more than

less than

none of these

same as

Automobile MCQ 10

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Automobile MCQ 9

Team Stuffworking — Fri, 05 Jun 2020 18:26:26 +0000

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1. The rigid suspension is beneficial when

it is desired to have more flexibility in design

it is desired to reduce the unsprung mass

large changes in load make it necessary to have a large suspension stroke

it is desired to improve tyre-to-ground contact characteristics

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

in the lateral direction

near the centre

in the cross direction

near the edges

3. The discharged lead-acid battery has on its plates

lead peroxide (PbO2)

sulphuric acid (H2SO4)

spongy lead (Pb)

lead sulphate (PbSO4)

4. The auto ignition in a spark ignition engine means

ignition induced by the passage of a spark

ignition of the charge before the passage of flame front

ignition induced to supplement the process of normal combustion

automatic ignition of the charge at the end of compression

5. 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

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

Toe

Caster

Steering gear ratio

Camber

7. 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

turns oil into fine mist for spray lubrication

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

removes impurities from cylinder head lubricating oil

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

oil strainer - oil pump - relief valve - oil filter - cylinder head - cylinder block - oil pan

oil pump - oil strainer - relief valve - oil filter - cylinder block - cylinder head - oil pan

oil strainer - oil pump - relief valve - oil filter - cylinder block - cylinder head - oil pan

oil strainer - oil filter - relief valve - oil pump - cylinder block - cylinder head - oil pan

9. In petrol engines, during suction stroke, __________ is drawn in the cylinder

none of these

air and fuel

only air

only fuel

10. A three way catalytic converter

removes CO, HC, and NO2 from the exhaust gasses passing through it

recirculates exhaust gasses

reduces N2, H2O, and CO2 emission levels

burns fuel vapaour gasses

11. The materials used for cylinder block are

cast iron and steel

cast iron and aluminium alloy

steel and aluminium alloy

brass and steel

12. The positive plates of a lead acid battery has

lead peroxide (PbO2)

sulphuric acid (H2SO4)

spongy lead (Pb)

lead sulphate (PbSO4)

13. The path taken by intake air is

air cleaner - intake manifold - carburettor (or throttle body) - intake ports - cylinders

air cleaner - carburettor (or throttle body) - intake manifold - intake ports - cylinders

carburettor (or throttle body) - air cleaner - intake manifold - intake ports - cylinders

air cleaner - carburettor (or throttle body) -intake ports - intake manifold - cylinders

14. 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

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

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

15. The camshaft is driven by the crankshaft via the timing belt.

Incorrect

Correct

16. The engine oil is stored in __________ when the engine is not running.

separate oil tank

oil pan

oil pump

cylinder head

17. The condition that results in large quantities of CO emission is

insufficient air during combustion

insufficient fuel during combustion

low temperature combustion

high temperature combustion

18. In comparison with a radial tyre, one advantage of a bias-ply tyre is

none of these

smoother ride at low speeds

longer life

lower rolling resistance

19. The sequence order of events in a four-stroke engine is

exhaust - compression - power - suction

suction - exhaust - power - compression

suction - power - compression - exhaust

suction - compression - power - exhaust

20. The capacity of a battery is usually expressed in terms of

weight

ampere-hours

volts

amperes

Automobile MCQ 9

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Automobile MCQ 8

Team Stuffworking — Fri, 05 Jun 2020 18:24:51 +0000

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1. When the top of the wheel is tilted outward, then it is called

negative camber

positive caster

positive camber

negative caster

2. The purpose of transmission in an automobile is

none of these

to vary the power of automobile

to vary the torque at the wheels

to vary the speed of automobile

3. A basic difference between the spark ignition engine and the Diesel engine is that the

Diesel engine compresses air alone instead of an air-fuel mixture

fuel is sprayed into the combustion chamber in the Diesel engine as the piston nears T.D.C. on the compression stroke

all of these

air temperature ignites the fuel in the Diesel engine

4. When indicated power (I.P.) and frictional power (F.P.) are known, we can calculate

mean effective pressure

specific air consumption

brake power

compression ratio

5. An oil filter bypass valve opens when the

engine runs at high speed

oil filter becomes clogged

engine overheats

engine is cold

6. The cam shaft in an engine is always mounted

perpendicular to the crankshaft

inclined to the crankshaft

none of these

parallel to the crankshaft

7. 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 distilled water

adding sulphuric acid

8. Damper is also known as

shock absorber

torsion bar

radius rod

spring

10. For the same maximum pressure and temperature

none of these

both Otto cycle and Diesel cycle are equally efficient

Diesel cycle is more efficient than Otto cycle

Otto cycle is more efficient than Diesel cycle

10. 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

warm up and lubricate the pump

supply a large amount of fuel and thereby create a choke effect

enable the pump's fault-diagnosis function to operate

11. 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.

12. 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

13. 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.

I.P/B.P.

B.P/F.P

B.P/I.P.

14. The lower cylindrical portion of the piston which improves piston cooling performance is called

connecting rod

piston skirt

piston crown

piston pin boss

15. The power actually developed inside the engine cylinder is called as

none of these

frictional power

indicated power

brake power

16. When turning, the differential generates a difference in the speed of the left and right wheels

False

True

17. The combustion process in a Diesel engine is a

constant temperature process

adiabatic process

constant volume process

constant pressure process

18. If clearance volume of I.C. engines is increased, the compression ratio will

remain constant

decrease

increase

19. The compression ratio of a petrol engine is nearly

8:1

15:1

4:1

20:1

20. The basic function of the suspension is to

automatically correct the effects of over steering

ensure that the steering wheel can deliver a suitable amount of steering force

absorb vibration and impact forces from the road surface

ensure that wheel alignment is not disturbed during driving

Automobile MCQ 8

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Automobile MCQ 7

Team Stuffworking — Fri, 05 Jun 2020 18:23:12 +0000

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1. The component in the radiator of an automobile that increases the boiling point of water is

pressure cap

water jacket

drain plug

vacuum valve

2. The ignition coil is used to

step up current

step up voltage

step down current

step down voltage

3. In vehicles with tilt steering, the steering column is pivoted in

steering yoke joint

upper bracket

tilt bracket

lower bracket

4. The process of removing the burnt gases from the engine cylinder by the fresh charge coming into the engine cylinder from the crank-case, is known as

cleaning

priming

detonation

scavenging

5. With the increase of battery temperature, the specific gravity of electrolyte

none of these

reamains the same

increases

decreases

6. The process of supplying the intake air to the engine cylinder at a pressure greater than the pressure of the surrounding atmosphere is known as

scavenging

supercharging

auto-ignition

detonation

7. The caster is called positive when the top of the king pin is inclined to the

left of the vehicle

rear of the vehicle

right of the vehicle

front of the vehicle

8. The main purpose of an engine's air filter is that it

reduces the engine's air intake noise

prevents dust and other foreign matter from entering the engine

prevents rain water from entering the engine

controls the engine's air intake volume

9. The effect of vapour locking on the brake, performance is that the

vapour locking has no effect on brake performance

brakes functions effectively

brakes fail completely

brake operation is delayed after depression of the brake pedal

10. The characteristic that is enhanced by the honing of cylinder sleeves inner surface is

cooling efficiency

none of these

lubrication performance

resistance to wear

11. The basic purpose of a four wheel drive (4WD) system is that it

ensures effective transmission of engine torque to all four wheels, even on slippery road surfaces

eliminates the need of snow tyres, tyre chains, etc.

delivers improved cornering on dry road surfaces

ensures that effective braking can be performed, even on slippery surfaces

12. The basic characteristics of a brake fluid is

all of these

low viscosity

compatibility with rubber and metal parts

a high boiling point

13. The ports are used in

two-stroke I.C. engines

none of these

V-6 engines

four stroke I.C. engines

14. The petrol engine works on

Rankine cycle

Carnot cycle

Otto cycle

Diesel cycle

15. The starting system includes

a battery, a distributor, and an ignition switch

a battery, a starter, and an ignition switch

a battery, a starter, and a distributor

a distributor, a starter, and an ignition switch

16. The heat transfer from coolant to air in the radiator of an automobile engine takes place by

convection and radiation

convention only

conduction, convection and radiation

radiation only

17. The reconditioning process used to give cylinder bore surfaces a cross-hatch pattern, is known as

boring

honing

porous plating

shot peening

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

none of these

gives colour and filling up effect to the paint

makes paint film hard

optimises the viscosity of paint

19. A laminated glass upon cracking

bursts into sharp edged fragments

sandwiched layer traps the fragments

breaks into the form of crystals

bursts into granular pieces

20. In a four-stroke Diesel engine, the intake valve

opens at 20° before T.D.C. and closes at 35° after B.D.C.

opens at T.D.C. and closes at B.D.C.

none of these

opens at 10° after T.D.C. and closes at 20° before B.D.C.

Automobile MCQ 7

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Automobile MCQ 6

Team Stuffworking — Fri, 05 Jun 2020 18:21:30 +0000

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1. The parking brakes employed in vehicles are operated

mechanically

none of these

pneumatically

hydraulically

2. Tachometer in a vehicle measures

speed

engine r.p.m.

fuel consumption

distance

3. The self ignition temperature of Diesel as compared to petrol is

lower

higher

same

depends on fuel quality

4. The function of a carburettor is to control the amount and ratio of air-fuel mixture.

True

False

5. Effect of detonation is

overheating of engine

delay in ignition

overcooling of engine

loss of power

6. In aluminium cylinder blocks, the cylinder liners are made of

aluminium

brass

cast iron

ceramic

7. The purpose of a balancer shaft is to

adjust the timing of the intake and exhaust valve openings

balance the timing in the movement of the two groups of pistons

reduce vibrations caused by the crankshaft rotation

increase inertia force of the rotating crankshaft

8. Free pedal play in car clutches is about

40mm

25 mm

15 mm

60 mm

9. The exhaust gas from petrol engine contains

water vapours

all of these

petrol vapours

carbon monoxide

10. The torque converter uses __________ to transfer torque.

automatic transmission fluid (ATF)

gears

air

clutch

11. The device for smoothening out the power impulses from the engine is called

flywheel

torque converter

clutch

differential

12. The connecting rod is attached to the piston by the

rod cap

cap roller bearing

piston pin

cap bolt

13. In a Diesel engine, the function of a fuel injector is to

ignite the air-fuel mixture

provide flame front for ignition

spray atomized fuel in the cylinder

mix the fuel and air

14. The function of positive crankcase ventilation (PCV) system is that it

feeds blow-by gases to the exhaust manifold

returns blow-by gases from the crankcase to the intake system

mixes fuel with air

promotes combustion by creating a swirling movement in the air-fuel mixture

15. Clutch facings are usually attached to the plate by

brass rivets

steel rivets

aluminium screws

steel screws

16. The two kinds of piston rings are

compression and sliding seal rings

pressure and sealing rings

oil scrapper and oil-control rings

compression and oil-control rings

17. The function of a radiator fan in the cooling system is that

it draws heat out of the engine compartment

it blows air through the radiator when necessary

it is turned by wind force as the vehicle moves forward, and its rotation drives the water pump

it cools the engine by blowing air onto the cylinder block

18. The sequence in which the force is transmitted through a brake system when the brake pedal is depressed is

brake pedal - master cylinder - vacuum servo mechanism - brake lines - brake pads

brake pedal - brake lines - vacuum servo mechanism - master cylinder - brake pads

brake pedal - master cylinder - brake lines - vacuum servo mechanism - brake pads

brake pedal - vacuum servo mechanism - master cylinder - brake lines - brake pads

19. The purpose of a thermostat in an engine cooling system is to

pressurise the system to raise the boiling point

indicate the coolant temperature

prevent the coolant from boiling

allow the engine to warm up quickly

20. The main function of an exhaust muffler is the

optimisation of exhaust efficiency

reduction of nitrogen oxide in the exhaust gases

reduction of exhaust noise

reduction of the exhaust gas volume

Automobile MCQ 6

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Automobile MCQ 5

Team Stuffworking — Fri, 05 Jun 2020 18:19:31 +0000

<< MCQ 3 MCQ 4 MCQ 5 MCQ 6 >>

1. The correct flow of power through the drive train is

engine - driveshafts - clutch - mainshaft - countershaft - final driven gear - wheels

engine - mainshaft - countershaft - clutch - final driven gear - driveshafts - wheels

engine - clutch - mainshaft - countershaft - final driven gear - driveshafts - wheels

engine - clutch - countershaft - mainshaft - final driven gear - driveshafts - wheels

2. The aspect ratio (expressed in percentage) of the tyre is defined as the ratio of

wheel diameter to section width

section width to section height

wheel diameter to section height

section height to section width

3. The seat belt will move out smoothly when pulled out slowly, but it will lock when pulled quickly.

Disagree

Agree

4. In bias ply tyres

one ply layer runs diagonally one way and another layer runs diagonally the other way

belts of steel mesh are used in the tyres

all plies run parallel to one another

all of the above

5. The calorific value of Diesel is about

45.5 MJ/kg

36.5 MJ/kg

38.5 MJ/kg

42.5 MJ/kg

6. The octane number of compressed natural gas (CNG) is

110

100

120

7. Two advantages of using helical gears rather than spur gears in a transmission system are

noise level and strength

noise level and economy

strength and less end thrust

strength and cost

8. When the battery is half (50%) charged, the specific gravity of acid in a battery is usually

1.19

1.12

0.74

9. The negative plates of a lead acid battery has

sulphuric acid

lead peroxide (PbO2)

spongy lead (Pb)

lead sulphate

10. The compression ratio for Diesel engines usually lies in the range of

25-40

15-25

10-15

6-10

11. The function of oil-control rings is that it

maintains a seal and prevents escape of burned gases and oil leakage

lubricates the cylinder wall by releasing oil from its hole

keeps the cylinder wall lubricated by holding oil in its channel

prevents engine oil from going into the combustion chamber and returns excess lubricating oil off the cylinder wall through the return holes in the piston to the oil pan

12. In order to implement gear changes in the gear unit of an automatic transmission, a __________ is used.

magnetic clutch

hydraulic multi plate clutch

synchronizer

planetary gear

13. In a petrol engine, the high voltage for spark plug is in the order of

2000 volts

22 kilovolts

11 kilovolts

1000 volts

14. The specific gravity of Diesel is about

0.65

0.95

0.75

0.85

15. The boiling point of Diesel fuel is in the range of

100°C to 120°C

70°C to 100°C

180°C to 360 °C

120°C to 180°C

16. During braking, the brake shoe is moved outward to force the lining against the

brake drum

wheel rim or axle

anchor pin

wheel piston or cylinder

17. When the brake pedal free play is less than the specified value, then the

antilock braking system malfunctions

brake drags

brake fades

vapour locking occurs in the brake lines

18. The ease with which petrol vapourizes is called its

volatility

octane number

cetane number

oxidation

19. An imbalance wheel during vehicle operation

bounces vertically or deflects from side to side (as seen from front or rear)

creates a standing wave

makes large noise when its heavy point hits the road surface

deflects in the vehicle's longitudinal direction

20. The main function of the brake fluid is

none of these

power transmission

lubrication

cooling

Automobile Quiz 5

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Automobile MCQ 4

Team Stuffworking — Fri, 05 Jun 2020 18:11:39 +0000

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1. The air resistance to a car at 20 kmph is R. The air resistance at 40 kmph will be

4 R2

2. The driveshafts are connected to the differential and wheel hubs through universal joints because the universal joints

absorb any difference in speed between the left and right wheels when the vehicle is turning

none of these

absorb the vibrations transferred from the surface of the road

compensate for variations in the relative positions of the differential and the wheels which result from bumpy road surfaces or other similar driving conditions.

3. The two rows of cylinders in a 'V' type engine are generally arranged at

45°

130°

90°

60°

4. The characteristic that is enhanced by the use of cylinder sleeves is

cooling efficiency

none of these

lubrication performance

resistance to wear

5. The differential ensures that each wheel is driven at a speed which corresponds to the distance it must travel around a corner, and it consequently prevents against excessive tyre wear.

Disagree

Agree

6. The crescent-shaped cavity on the piston head top surface is called as

valve clearance

snap ring

valve recess

piston oil hole

7. The function of antilock brake system (ABS) is that is

reduces the stopping distance

prevents nose dives during braking and thereby postpones locking of the wheels

minimises the brake fade

maintains directional control during braking by preventing the wheels from locking

8. The size of engine cylinder is referred in terms of its

diameter and bore

displacement and efficiency

bore and length

bore and stroke

9. The connecting rods are generally made of __________ shaped cross-section.

10. The anti-knock property of compression ignition engine fuel can be improved by adding

trimethyl pentane

tetraethyl lead

hexadecane

amyl nitrate

11. The purpose of a cylinder head gasket is to

removes impurities from cylinder head lubricating oil

prevent engine oil from going into combustion chamber

none of these

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

12. A worm gear is used as the pinion for the rack and pinion type of steering gearbox, because it

reduces the amount of kick-back for large steering angles

allows the steering wheel to be turned by a greater amount when steering

makes the steering more responsive

improves steering comfort when steering wheel is turned to effect small changes in the direction of forward motion

13. The octane rating of petrol commerically available is

95-100

100-110

85-95

110-125

14. The rating of C.I. engine fuel (Diesel) is given by

performance number

cetane number

none of these

octane number

15. Which part of the automobile tyre is subjected to greatest flexing action ?

Shoulder

Side wall

Bead

Tread

16. The starter motor drives the crankshaft by

V-belt drive

flat belt drive

gear drive

chain drive

17. The piston compression rings are made of

aluminium

bronze

steel

cast iron

18. The purpose of turning radius gauges is to measure the

difference in the toe angles of the left and right wheels

free play of the steering wheel

turning radius of the left and right wheels

contact areas of the tyres

19. The smooth shift mechanism of an automatic transmission reduces the degree of shock at shifting of gears.

Yes

20. The temperature at which tyre inflation pressure should be checked is

35°C

25°C

20°C

ambient temperature

Automobile Quiz 4

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Automobile MCQ 3

Team Stuffworking — Fri, 05 Jun 2020 18:09:06 +0000

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1. A baffle plate is fitted inside the oil pan to prevent the oil from splashing when it is subjected to vibration and other movement during vehicle operation.

True

False

2. If the engine coolant leaks into the engine oil, then engine oil

becomes foamy

none of these

turns black

appears milky

3. What type of bearing is used for main bearings and connecting rod bearings ?

Needle roller bearing

Ballbearings

Taper roller bearing

Plain bearings

4. The torque available at the contact between driving wheels and road is known as

clutch effort

brake effort

none of these

tractive effort

5. A traction control system (TCS) in automobiles controls the

stopping distance in case of emergency

torque that is transmitted by the tyres to the road surface

vibrations on the steering wheel

engine power during acceleration

6. The diagram which shows the correct crank positions corresponding to the opening and closing of the valves, is known as

axial force diagram

valve timing diagram

none of these

indicator diagram

7. The advantage of double-wishbone suspension design is that a large amount of freedom is available for setting geometry and precise settings can be made for driving comfort and steerability,

Correct

Incorrect

8. In automobiles G.V.W. refers to

gross vehicle wheel track

gross vehicle wheel base

gross vehicle width

gross vehicle weight

9. In a spark plug, when the temperature of the central electrode exceeds a certain temperature, any carbon that has adhered will be burnt off, and the temperature at which this burning off carbon starts is referred to as the self cleaning temperature.

Incorrect

Correct

10. The flywheel and the pressure plate bind the clutch disc between them so that the engine and the transmission can be engaged.

Yes

11. The coefficient of friction for the clutch facing is approximately

0.1

0.4

1.2

0.8

12. The air gap between the central electrode and ground (or side) electrode of a spark plug is around

1 mm

0.2 mm

0.5 mm

1.5 mm

13. The main function of the tread pattern on tyre is that

the tread grooves pass air between the tyre and road surface, thereby preventing tyre from overheating

the tread pattern protects the tyre's inner carcass from small stones and pieces of glass

the crests between the tread grooves absorb road noise

in wet conditions, the tread grooves expel water that is drawn between the tyre and road surface

14. The battery is an electrochemical device, which means battery

uses chemical action to provide electricity

does not use an electrolyte

has curved plates instead of flat plates

makes chemicals by mechanical means

15. If the level of tension in the belt is too high, it can result in a loss of power or in bending of the rotating shaft or crankshaft.

Correct

Incorrect

16. If the spark plug deposit indicates black coating of soot, it indicates that the engine has been generally operating on

stoichiometric mixture

most economical mixture

too rich mixture

too lean mixture

17. The number of exhaust manifolds in a V-6 engine are

two

four

eight

one

18. The ball joints are used on the tie-rod ends, because they

can deal with movement of the suspension both vertically and in other directions

improve the force transmission speed

reduce the amount of sliding resistance

reduce the amount of noise generated

19. The main task of a battery in automobiles is to

supply electricity to the vehicle's electrical system at all times while the engine is running

supply a large amount of power to turn the starter motor when the engine is being started

act as a reservoir or stabilizer of electricity

supply electricity to the alternator

20. The major purpose of an electronically-controlled automatic transmission is that, this type of transmission

eliminates gear clutches

reduces shift shock and achieves more efficient transmission of engine torque

eliminates the gear shift lever

reduces the number of automatic-transmission components

Automobile Quiz 3

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Automobile MCQ 2

Team Stuffworking — Fri, 05 Jun 2020 18:03:52 +0000

MCQ 1 MCQ 2 MCQ 3 MCQ 4 >>

1. The motion of the cam is transferred to the valves through

camshaft pulley

valve stems

pistons

rocker arms

2. The condition that causes vapour locking in a brake system is

keeping the vehicle without use for an extended period

overcooling of the brakes during high speed driving

an excessively high engine speed on a downhill road

overheating of the fluid due to frequent brake application

3. The function of an alternator in an automobile is to

convert mechanical energy into electrical energy

supply electric power

partly convert engine power into electric power

continually recharge the battery

4. It is necessary to maintain the valve clearances as they

make the crankshaft turn smoothly

allow for lengthening of the valves owing to the heat of combustion

increase the speed at which the valves move up and down

reduce the resistance to sliding that occurs between the cam and the tappet

5. In a unit type body (frameless body) design, the sheet metal parts are welded together, forming a frame work to which outer skin is attached.

False

True

6. The most commonly used supplementary restraint system (SRS) component is

airbag

steering

seat belt

brake

7. The valve overlap in four stroke petrol engines is approximately

120°

90°

30°

60°

8. The petrol engines are also known as

steam engines

none of these

spark ignition (S.I.) engines

compression ignition (C.I.) engines

9. The natural gas is compressed in a CNG cylinder at a pressure of

200 bar

220 bar

300 bar

250 bar

10. In a fuel injection system, the electronic control module (ECM) calculates the optimum fuel-injection volume for the engine condition based on the data received from the sensors, and injects this volume of fuel into the intake manifold at the optimum timing.

Incorrect

Correct

11. The operation of removing trapped air from the hydraulic braking system is known as

bleeding

tapping

cleaning

trapping

12. The compression ratio in petrol engine is kept less than in Diesel engine because

higher or equivalent compression ratio in petrol engines is not possible due to pre-ignition

it makes petrol engines lighter

less compression ratio gives better performance

it is just customary to have less compression ratio in petrol engines

13. The cetane number of a Diesel fuel is a measure of

delay peirod

volatility

viscosity

ignition quality

14. The component that connects the steering rack to the knuckles is

tie-rod

pivot

sector gear

spline

15. The painting of automobiles is done to

all of these

prevent rust from growing on the body

improve its external appearance

retain the characteristics of steel for long

16. The calorific value of petrol is about

39.4 - 42.5 MJ/kg

42.7 - 43.5 MJ/kg

45.5 - 47 MJ/kg

36.5 - 38.5 MJ/kg

17. The function of a first compression ring (top ring) is that it

maintains a seal and prevents escape of burned gases and loss of pressure in the combustion chamber

maintains a seal and prevents the fuel leakage

creates swirl

increases the combustion temperature

18. The braking control type traction control system (TCS) generally operates in the speed range of

less than 20 kmph

less than 40 kmph

more than 60 kmph

less than 60 kmph

19. The stroke of an engine is the

distance between T.D.C. and B.D.C.

internal diameter of the cylinder

volume of the cylinder

length of the connecting rod

20. The function of a second ring is that it is a

back up compression ring which will work in place of the top ring when it is broken

cushion ring which prevents piston slap and knock

back up oil control ring which will work in place of the bottom ring when it is broken

compression ring and aids the top ring in sealing and cooling

Automobile Quiz 2

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