aKidsZone
Home
MCQs
Engineering — Quiz
Automobile Engineering MCQ Set 02
80 questions · Test your knowledge
Home
/
MCQs
/
Automobile Engineering MCQ Set 02
1
In Diesel engines, the duration between the time of injection and the time of ignition is called
A
Spill cut-off
B
Delay period
C
Injection period
D
Ignition period
2
In bias ply tyres
A
All plies run parallel to one another (B) (D)
B
Belts of steel mesh are used in the tyres
C
One ply layer runs diagonally one way and another layer runs diagonally the other way
D
All of the above
3
The aluminium alloy is used in cylinder blocks because
A
It is lighter and has good heat dissipation characteristics
B
Material cost is low
C
It does not require any cylinder liners
D
The piston is also made of aluminium alloy
4
The main function of the tread pattern on tyre is that
A
The tread grooves pass air between the tyre and road surface, thereby preventing tyre from overheating
B
The crests between the tread grooves absorb road noise
C
In wet conditions, the tread grooves expel water that is drawn between the tyre and road surface
D
The tread pattern protects the tyre's inner carcass from small stones and pieces of glass
5
The most commonly used supplementary restraint system (SRS) component is
A
Seat belt
B
Brake
C
Airbag
D
Steering
6
The major purpose of an electronically controlled automatic transmission is that this type of transmission
A
Eliminates gear clutches
B
Eliminates the gear shaft lever
C
Reduces the number of automatic transmission components
D
Reduces shift shock and achieves more efficient transmission of engine torque
7
The antiknock property of compression ignition engine fuel can be improved by adding
A
Tetraethyl lead
B
Trimethyl pentane
C
Amyl nitrate
D
Hexadecane
8
A worm gear is used as the pinion for the rack and pinion type of steering gearbox, because it
A
Improves steering comfort when steering wheel is turned to effect small changes in the direction of forward motion
B
Allows the steering wheel to be turned by a greater amount when steering
C
Makes the steering more responsive
D
Reduces the amount of kickback for large steering angles
9
If the spark plug deposit indicates black coating of soot, it indicates that the engine has been generally operating on
A
Too lean mixture
B
Stoichiometric mixture
C
Most economical mixture
D
Too rich mixture
10
The crescent shaped cavity on the piston head top surface is called as
A
Piston oil hole
B
Snap ring
C
Valve recess
D
Valve clearance
11
The crescent shaped cavity on the piston head top surface is called as
A
Piston oil hole
B
Snap ring
C
Valve recess
D
Valve clearance
12
The characteristic that is enhanced by the use of cylinder sleeves is
A
Cooling efficiency
B
Resistance to wear
C
Lubrication performance
D
None of these
13
The connecting rod connects the piston and the
A
Cylinder head
B
Cylinder block
C
Camshaft
D
Crankshaft
14
The three basic cylinder arrangements for automotive engines are
A
Flat, radial, and V
B
In a row, in line, and opposed
C
In line, V, and opposed
D
V, double row, and opposed
15
Which part of the automobile tyre is subjected to greatest flexing action?
A
Bead
B
Side wall
C
Shoulder
D
Tread
16
The compression ratio for Diesel engines usually lies in the range of
A
6-10
B
10-15
C
15-25
D
25-40
17
The piston compression rings are made of
A
Cast iron
B
Steel
C
Aluminium
D
Bronze
18
In a forced feed lubrication system, the device used to guard against excessive oil pressure, is known as
A
Release chamber
B
Balancer
C
Relief valve
D
Stop valve
19
The aspect ratio (expressed in percentage) of the tyre is defined as the ratio of
A
Section width to section height
B
Section height to section width
C
Wheel diameter to section height
D
Wheel diameter to section width
20
The discharged lead acid battery has on its plates
A
Lead peroxide (PbOâ‚‚)
B
Spongy lead (Pb)
C
Lead sulphate (PbSOâ‚„)
D
Sulphuric acid (Hâ‚‚SOâ‚„)
21
In order to implement gear changes in the gear unit of an automatic transmission, a ___________ is used.
A
Synchronizer
B
Planetary gear
C
Magnetic clutch
D
Hydraulic multi plate clutch
22
The purpose of turning radius gauges is to measure the
A
Contact areas of the tyres
B
Free plays of the steering wheel
C
Turning radius of the left and right wheels
D
Difference in the toe angles of the left and right wheels
23
The natural gas is compressed in a CNG cylinder at a pressure of
A
200 bar
B
220 bar
C
250 bar
D
300 bar
24
Which of the following indicates multi-grade oil?
A
SAE 30
B
API SF
C
SAE20 W50
D
API 50
25
The compression ratio in petrol engine is kept less than in Diesel engine because
A
It makes petrol engines lighter
B
Higher or equivalent compression ratio in petrol engines is not possible due to pre-ignition
C
Less compression ratio gives better performance
D
It is just customary to have less compression ratio in petrol engines
26
The main task of a battery in automobiles is to
A
Supply electricity to the alternator
B
Act as a reservoir or stabilizer of electricity
C
Supply electricity to the vehicle's electrical system at all times while the engine is running
D
Supply a large amount of power to turn the starter motor when the engine is being started
27
The service brakes employed in cars are generally operated
A
Mechanically
B
Hydraulically
C
Pneumatically
D
None of these
28
The boiling point of Diesel fuel is in the range of
A
70°C to 100°C
B
100°C to 120°C
C
120°C to 180°C
D
180°C to 360 °C
29
The frequency of flashing of light per minute in a direction (side turn) indicator is about
A
9
B
90
C
900
D
9000
30
The ignition coil is used to
A
Step up current
B
Step down current
C
Step up voltage
D
Step down voltage
31
The process of removing the burnt gases from the engine cylinder by the fresh charge coming into the engine cylinder from the crankcase, is known as
A
Cleaning
B
Priming
C
Scavenging
D
Detonation
32
The self ignition temperature of Diesel as compared to petrol is
A
Higher
B
Lower
C
Same
D
Depends on fuel quality
33
With the increase of battery temperature, the specific gravity of electrolyte
A
Increases
B
Decreases
C
Remains the same
D
None of these
34
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
A
Supercharging
B
Auto ignition
C
Scavenging
D
Detonation
35
In aluminium cylinder blocks, the cylinder liners are made of (A)
A
Aluminium
B
Ceramic
C
Brass
D
Cast iron
36
The purpose of a balancer shaft is to
A
Balance the timing in the movement of the two groups of pistons
B
Increase inertia force of the rotating crankshaft
C
Reduce vibrations caused by the crankshaft rotation
D
Adjusts the timing of the intake and exhaust valve openings
37
The caster is called positive when the top of the king pin is inclined to the
A
Rear of the vehicle
B
Front of the vehicle
C
Left of the vehicle
D
Right of the vehicle
38
In Spark Ignition Engine
A
Only air is introduced into the cylinder
B
The mixture of air and fuel is introduced into the cylinder from carburettor
C
Both (A) and (B)
D
None of these
39
The caster is called positive when the top of the king pin is inclined to the
A
Rear of the vehicle
B
Front of the vehicle
C
Left of the vehicle
D
Right of the vehicle
40
The main purpose of an engine's air cleaner is that it
A
Controls the engine's air intake volume
B
Reduces the engine's air intake noise
C
Prevents rain water from entering the engine
D
Prevents dust and other foreign matter from entering the engine
41
The device for smoothening out the power impulses from the engine is called
A
Clutch
B
Differential
C
Flywheel
D
Torque converter
42
The main function of a master cylinder is to
A
Adjust the extent of brake pedal free play
B
Boost the force applied to brake pedal
C
Convert brake pedal force into hydraulic pressure
D
Ensure that all the wheel brakes are supplied with the same amount of fluid pressure
43
The exhaust gas from petrol engine contains
A
Petrol vapours
B
Water vapours
C
Carbon monoxide
D
All of these
44
The firing order for an opposed four cylinder l.C. engine is
A
1-2-3-4
B
1-3-4-2
C
1-4-3-2
D
1-3-2-4
45
The function of positive crankcase ventilation (PCV) system is that it
A
Mixes fuel with air
B
Promotes combustion by creating a swirling movement in the air-fuel mixture
C
Returns blow by gases from the crankcase to the intake system
D
Feeds blow by gases to the exhaust manifold
46
The two kinds of piston rings are
A
Compression and oil control rings
B
Compression and sliding seal rings
C
Oil scrapper and oil control rings
D
Pressure and sealing rings
47
The sequence in which the force is transmitted through a brake system when the brake pedal is depressed is
A
Brake pedal, master cylinder, brake lines, vacuum servo mechanism, brake pads
B
Brake pedal, vacuum servo mechanism, master cylinder, brake lines, brake pads
C
Brake pedal, master cylinder, vacuum servo mechanism, brake lines, brake pads
D
Brake pedal, brake lines, vacuum servo mechanism, master cylinder, brake pads
48
The basic purpose of a four wheel drive (4WD) system is that it
A
Delivers improved cornering on dry road surfaces
B
Eliminates the need of snow tyres, tyre chains, etc.
C
Ensures effective transmission of engine torque to all four wheels, even on slippery road surfaces
D
Ensures that effective braking can be performed, even on slippery surfaces
49
Ensures that effective braking can be performed, even on slippery surfaces
A
Radiation only
B
Convention only
C
Convection and radiation
D
Conduction, convection and radiation
50
The purpose of a thermostat in an engine cooling system is to
A
Prevent the coolant from boiling
B
Allow the engine to warm up quickly
C
Indicate the coolant temperature
D
Pressurise the system to raise the boiling point
51
The basic characteristics of a brake fluid is
A
A high boiling point
B
Low viscosity
C
Compatibility with rubber and metal parts
D
All of these
52
Caster is a
A
Forward tilt of the kingpin
B
Backward tilt of the kingpin
C
Either 'A' or 'B'
D
None of these
53
A front stabilizer bar is used to
A
Increase vehicle load carrying capacity
B
Provide a softer ride
C
Control suspension movement and body roll
D
All of the above
54
The timing belt is attached to the camshaft pulley and
A
Timing belt drive pulley
B
Distributor
C
Radiator fan pulley
D
Alternator pulley
55
A battery can be charged by
A
Adding distilled water
B
Adding sulphuric acid
C
Applying voltage in the reverse direction to that of charging
D
Applying a voltage in the same direction to that of charging
56
When the front wheels of a vehicle are locked during braking, then
A
Stopping distance becomes extremely long
B
Front tyres skid across the road surface, and the vehicle spins around
C
(C) (D)
D
Driver loses control over the steering, and the vehicle continues moving in its current direction
57
The order in which effort applied to the steering wheel is transferred to the front wheel is
A
Steering wheel, steering gearbox, steering shaft, tie rod, steering knuckle, front wheels
B
Steering wheel, steering shaft, steering gearbox, tie rod, steering knuckle, front wheels
C
Steering wheel, steering shaft, steering gearbox, steering knuckle, tie rod, front wheels
D
Steering wheel, tie rod, steering gearbox, steering shaft, steering knuckle, front wheels
58
The best fuels for compression ignition engines are
A
Straight chain paraffin (B) (C) (D)
B
Aromatics
C
Branched chain paraffin
D
Naphthalene
59
An oil filter bypass valve opens when the
A
Engine is cold
B
Engine overheats (C) (D)
C
Oil filter becomes clogged
D
Engine runs at high speed
60
Damper is also known as
A
Shock absorber (B) (C) (D)
B
Torsion bar
C
Spring
D
Radius rod
61
The main characteristics of a maintenance free (MF) battery is that
A
A maintenance free battery requires little maintenance during normal use and it is sufficient to add water instead of an electrolyte containing sulphuric acid
B
A maintenance free battery has a relatively short shelf life when compared with standard batteries
C
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
D
Recharging of a maintenance free battery is neither required nor possible
62
The most accurate ignition system of a spark ignition engine is
A
Magneto system
B
Battery system
C
Electronic control unit system
D
Magneto and electronic system
63
The main function of a resonator is that it (A)
A
Regulates the intake air flow rate
B
Reduces the intake air noise (C) (D)
C
Enhances intake efficiency
D
Regulates the intake air temperature
64
The fuel pump of a programmed fuel injection (PFI) system operate for two seconds when the ignition is turned to the start position to
A
Enable the pump's fault diagnosis function to operate
B
Warm up and lubricate the pump
C
Warm up and lubricate the pump (C) Supplies a large amount of fuel and thereby creates a choke effect
D
Pressurise the fuel system before the engine is started
65
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
66
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)
A
I.P/B.P.
B
B.P/I.P
C
B.P/F.P.
D
F.P/B.P.
67
The combustion process in a Diesel engine is a
A
Constant volume process
B
Constant pressure process
C
Constant temperature process
D
Adiabatic process
68
The damper fluid leakage typically occur from
A
Upper damper mounting
B
Bottom of damper
C
Clearance between inner and outer tubes of damper
D
Coil spring mounting
69
The tyre rotation is generally done at
A
1000 km
B
4000 km
C
6000 km
D
10,000 km
70
An under-inflated tyre will wear the tread most
A
Near the centre
B
Near the edges
C
In the lateral direction
D
In the cross direction
71
The purpose of a cylinder head gasket is to
A
Prevent the combustion gases from leaking from the joint between the cylinder block and the cylinder head
B
Prevent engine oil from going into combustion chamber
C
Removes impurities from cylinder head lubricating oil
D
None of the above
72
During suction stroke, the inside pressure of cylinder is
A
More than the atmospheric pressure
B
Less than the atmospheric pressure
C
Equal to the atmospheric pressure
D
None of these
73
The function of an oil control orifice is that it
A
Returns cylinder head lubricating oil to the oil pan at high speed
B
Turns oil into fine mist for spray lubrication
C
Regulates the pressure of engine oil supplied by the oil pump for the lubrication of cylinder head mechanism and other purposes
D
Removes impurities from cylinder head lubricating oil
74
Which of the following parameter can be adjusted by modifying the tie rod attachment length?
A
Camber
B
Caster
C
Toe
D
Steering gear ratio
75
The lubrication oil flow in an engine is in the order as
A
Oil strainer, oil pump, relief valve, oil filter, cylinder block, cylinder head and oil pan
B
Oil pump, oil strainer, relief valve, oil filter, cylinder block, cylinder head and oil pan
C
Oil strainer, oil filter, relief valve, oil pump, cylinder block, cylinder head and oil pan
D
Oil strainer, oil pump, relief valve, oil filter, cylinder head, cylinder block and oil pan
76
A three way catalytic converter
A
Re-circulates exhaust gases
B
Burns fuel vapour gases
C
Reduces Nâ‚‚, Hâ‚‚O, and COâ‚‚ emission levels
D
Removes CO, HC, and NOâ‚‚ from the exhaust gases passing through it
77
The fuel pump in the programmed fuel injection (PFI) system is located
A
Between the fuel filler pipe and fuel tank
B
In the fuel tank
C
On the distributor mounting in the engine compartment
D
On the engine compartment bulkhead
78
The basic purpose of tyre rotation on automobiles is to
A
Avoid ply separation
B
Equalize wear
C
Get better ride
D
None of these
79
Which of the following is not an automobile?
A
Motor cycle
B
Passenger car
C
Aeroplane
D
Truck
80
The ignition in a spark ignition engine takes place when the piston is
A
Exactly at the T.D.C. position on its compression stroke
B
Approaching the T.D.C. position on its compression stroke
C
Leaving the T.D.C. position on its compression stroke
D
Approaching the T.D.C position on its exhaust stroke
Submit Quiz
Back to All Quizzes