Which one of the following statements correctly describes the construction of a planetary gear type differential ?

Each planetary pinion gear meshes with both the central gear and the internal gear.

The six planetary pinions rotate in constant mesh with the internal gears.

One drive shaft is splined to the central gear and the other to the planetary gear.

Each planetary pinion gear meshes with both the central gear and the internal gear.

The internal gear is fixed to the planetary gear.

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

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.

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

A traction control system (TCS) in automobiles controls the

stopping distance in case of emergency

vibrations on the steering wheel

engine power during acceleration

torque that is transmitted by the tyres to the road surface

stopping distance in case of emergency

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

a maintenance-free battery has a relatively short shelf life when compared with standard batteries

since it is sealed, the water in a maintenance-free battery is not lost through evaporation thus accordingly it is not necessary to top up the cells with water

recharging of a maintenance-free battery is neither required nor possible

The function of an alternator in an automobile is to

partly convert engine power into electric power

convert mechanical energy into electrical energy

continually recharge the battery

partly convert engine power into electric power

The difference between DOT 3 and DOT 4 brake fluids is

DOT 4 fluid has a lower boiling point than DOT 3 fluid

DOT 4 fluid has a higher boiling point than DOT 3 fluid

DOT 4 fluid has a lower boiling point than DOT 3 fluid

DOT 3 and DOT 4 fluids have the same boiling point, but DOT 4 fluid has a longer service life

DOT 4 fluid is more resistant to freezing than DOT 3 fluid

The main function of the tread pattern on tyre is that

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

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

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

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

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

A maintenance free battery has a relatively short shelf life when compared with standard batteries

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

Recharging of a maintenance free battery is neither required nor possible

The drive-shafts 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

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.

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

When turning a corner

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

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

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

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

Increases the combustion temperature

Maintains a seal and prevents the fuel leakage

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

The two kinds of piston rings are

Compression and sliding seal rings

Compression and oil control rings

Compression and sliding seal rings

Oil scrapper and oil control rings

The purpose of adding pigment to the paint is that it

Optimises the viscosity of paint

Gives colour and filling up effect to the paint

The torque converter uses ________ to transfer torque.

Automatic transmission fluid (ATF)

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

Splashing action of the crankshaft

The pressure created by the oil pump

Splashing action of the crankshaft

In a four speed four stroke Diesel engine, the intake valve

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

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

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

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

The basic function of the suspension is to

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

Absorbs vibration and impact forces from the road surface

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

Ensure that wheel alignment is not disturbed during driving

Automatically correct the effects of over steering

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

Exhaust compression power suction

Which one of the following statements correctly describes the construction of a planetary gear type differential?

Each planetary pinion gear meshes with both the central gear and the internal gear.

The six planetary pinions rotate in constant mesh with the internal gears.

One drive shaft is splined to the central gear and the other to the planetary gear.

Each planetary pinion gear meshes with both the central gear and the internal gear.

The internal gear is fixed to the planetary gear.

Which one of the following statement correctly describes the construction of a bevel gear type differential?

The drive shafts are splined to the differential carrier.

The left side gear and the differential carrier rotate in constant unison.

The differential carrier houses differential pinion gears and side gears; each pinion gear meshes with a different side gear.

The differential carrier houses differential pinion gears and side gears.

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 electrical devices are switched off

Headlights and other electrical devices are switched on

Headlights and other lights are switched off

365 + Mcqs in Automobile Engineering in Automobile Engineering Page 2 McqOptions

51.	Which one of the following statements correctly describes the construction of a planetary gear type differential ?
A.	The six planetary pinions rotate in constant mesh with the internal gears.
B.	One drive shaft is splined to the central gear and the other to the planetary gear.
C.	Each planetary pinion gear meshes with both the central gear and the internal gear.
D.	The internal gear is fixed to the planetary gear.
Answer» C. Each planetary pinion gear meshes with both the central gear and the internal gear.

53.	An over-inflated tyre will wear the tread most near the
A.	edges
B.	corners
C.	centre
D.	none of these
Answer» D. none of these

54.	The connecting rod lower end is connected to the relevant __________ of crankshaft.
A.	big end
B.	crank arm
C.	journal
D.	small end
Answer» D. small end

56.	How many cells are used in a 12 volt car battery ?
A.	2
B.	4
C.	6
D.	8
Answer» D. 8

57.	A petrol that detonates easily is called
A.	high octane petrol
B.	low octane petrol
C.	unleaded petrol
D.	blended fuel
Answer» C. unleaded petrol

59.	Which of the following is not a part of the chassis ?
A.	Wheels
B.	Front axle
C.	Steering system
D.	Seats
Answer» E.

60.	In a four wheel drive (4WD), the number of gear boxes are
A.	1
B.	2
C.	3
D.	4
Answer» C. 3

61.	A four-cylinder engine has a capacity of 2.4 litres. The swept volume of one cylinder is
A.	400 cm³
B.	600 cm³
C.	1200 cm³
D.	2400 cm³
Answer» C. 1200 cm³

62.	The crankshaft of a typical in-line four cylinder engine has __________ balance weights.
A.	12
B.	4
C.	16
D.	8
Answer» E.

63.	If the engine coolant leaks into the engine oil, then engine oil
A.	appears milky
B.	becomes foamy
C.	turns black
D.	none of these
Answer» B. becomes foamy

64.	The engine oil is stored in __________ when the engine is not running.
A.	oil pan
B.	cylinder head
C.	oil pump
D.	separate oil tank
Answer» B. cylinder head

65.	Which of the following is not an automobile ?
A.	Motor cycle
B.	Passenger car
C.	Aeroplane
D.	Truck
Answer» D. Truck

67.	The octane rating of petrol commerically available is
A.	85-95
B.	95-100
C.	100-110
D.	110-125
Answer» B. 95-100

70.	The component that connects the steering rack to the knuckles is
A.	tie-rod
B.	sector gear
C.	pivot
D.	spline
Answer» B. sector gear

73.	Two speed reverse gear arrangement is generally provided in case of
A.	passenger cars
B.	metadors
C.	tractors
D.	trucks
Answer» D. trucks

66.	The function of an alternator in an automobile is to
A.	supply electric power
B.	convert mechanical energy into electrical energy
C.	continually recharge the battery
D.	partly convert engine power into electric power
Answer» D. partly convert engine power into electric power

69.	The information provided by the oxygen (O2) sensor to the feedback control system is about the
A.	air-fuel ratio
B.	air temperature
C.	air flow speed
D.	exhaust gas volume
Answer» B. air temperature

71.	The tilting of the front wheels away from the vertical, when viewed from the front of the car, is called
A.	camber
B.	caster
C.	toe-in
D.	toe-out
Answer» B. caster

74.	Which of the following oil is more viscous ?
A.	SAE 30
B.	SAE 40
C.	SAE 70
D.	SAE 80
Answer» E.

76.	When indicated power (I.P.) and frictional power (F.P.) are known, we can calculate
A.	Brake power
B.	Compression ratio
C.	Specific air consumption
D.	Mean effective pressure
Answer» B. Compression ratio

77.	Tachometer in a vehicle measures
A.	Speed
B.	Distance
C.	Engine r.p.m.
D.	Fuel consumption
Answer» D. Fuel consumption

81.	The function of a first compression ring (top ring) is that it
A.	Increases the combustion temperature
B.	Creates swirl
C.	Maintains a seal and prevents the fuel leakage
D.	Maintains a seal and prevents escape of burned gases and loss of pressure in the combustion chamber
Answer» E.

83.	The purpose of adding pigment to the paint is that it
A.	Optimises the viscosity of paint
B.	Makes paint film hard
C.	Gives colour and filling up effect to the paint
D.	None of the above
Answer» D. None of the above

84.	The torque converter uses ________ to transfer torque.
A.	Air
B.	Automatic transmission fluid (ATF)
C.	Gears
D.	Steel belt
Answer» C. Gears

85.	The forced fed lubrication system means that the oil is delivered to the engine by
A.	Gravity
B.	The pressure created by the oil pump
C.	Splashing action of the crankshaft
D.	None of these
Answer» C. Splashing action of the crankshaft

Explore topic-wise MCQs in Automobile Engineering.

Which one of the following statements correctly describes the construction of a planetary gear type differential ?

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

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

The connecting rod lower end is connected to the relevant __________ of crankshaft.

A traction control system (TCS) in automobiles controls the

How many cells are used in a 12 volt car battery ?

A petrol that detonates easily is called

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

Which of the following is not a part of the chassis ?

In a four wheel drive (4WD), the number of gear boxes are

A four-cylinder engine has a capacity of 2.4 litres. The swept volume of one cylinder is

The crankshaft of a typical in-line four cylinder engine has __________ balance weights.

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

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

Which of the following is not an automobile ?

The function of an alternator in an automobile is to

The octane rating of petrol commerically available is

The difference between DOT 3 and DOT 4 brake fluids is

The information provided by the oxygen (O2) sensor to the feedback control system is about the

The component that connects the steering rack to the knuckles is

The tilting of the front wheels away from the vertical, when viewed from the front of the car, is called

The main function of the tread pattern on tyre is that

Two speed reverse gear arrangement is generally provided in case of

Which of the following oil is more viscous ?

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

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

Tachometer in a vehicle measures

The drive-shafts are connected to the differential and wheel hubs through universal joints because the universal joints

When turning a corner

The function of oil control rings is that it

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

The two kinds of piston rings are

The purpose of adding pigment to the paint is that it

The torque converter uses ________ to transfer torque.

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

In a four speed four stroke Diesel engine, the intake valve

The basic function of the suspension is to

The sequence order of events in a four stroke engine is

The main cause for the change in engine oil viscosity is

One effect of detonation is

Which of the following indicates multi-grade oil?

Which of the following oil is more viscous?

The oil pump is driven by the

The ease with which petrol vaporizes is called its

Two general types of tyres are

Which one of the following statements correctly describes the construction of a planetary gear type differential?

Which one of the following statement correctly describes the construction of a bevel gear type differential?

The main merit of a multi cylinder type cylinder sleeve is

The materials used for cylinder block are

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

89.	The main cause for the change in engine oil viscosity is
A.	Humidity
B.	Temperature
C.	Vibration
D.	Contamination
Answer» C. Vibration

90.	One effect of detonation is
A.	Delay in ignition
B.	Loss of power
C.	Overheating of engine
D.	Overcooling of engine
Answer» C. Overheating of engine

91.	Which of the following indicates multi-grade oil?
A.	SAE 30
B.	API SF
C.	SAE20 W50
D.	API 50
Answer» D. API 50

93.	The oil pump is driven by the
A.	Camshaft
B.	Alternator shaft
C.	Crankshaft via drive belt
D.	Crankshaft directly
Answer» E.

94.	The ease with which petrol vaporizes is called its
A.	Oxidation
B.	Octane number
C.	Volatility
D.	Cetane number
Answer» D. Cetane number

95.	Two general types of tyres are
A.	Tube type and tubeless
B.	Solid and tubeless
C.	Air and pneumatic
D.	Split rim and drop centre
Answer» B. Solid and tubeless

98.	The main merit of a multi cylinder type cylinder sleeve is
A.	Smaller engine dimensions
B.	Better cooling efficiency
C.	High rigidity
D.	None of these
Answer» B. Better cooling efficiency

99.	The materials used for cylinder block are
A.	Cast iron and steel
B.	Cast iron and aluminium alloy
C.	Steel and aluminium alloy
D.	Brass and steel
Answer» C. Steel and aluminium alloy

100.	In which of the following conditions, the idle CO percentage should be measured with the vehicle?
A.	Headlights and other electrical devices are switched off
B.	Headlights and other electrical devices are switched on
C.	Headlights and other lights are switched off
D.	Headlights are switched on
Answer» B. Headlights and other electrical devices are switched on