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Automobile Engineering MCQ Set 03
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Automobile Engineering MCQ Set 03
1
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
2
The included angle is the sum of the
A
Camber and castor
B
Castor and S.A.I
C
Camber and S.A.I.
D
Camber and toe in
3
Vulcanizing means
A
Heating rubber under pressure
B
Spraying with special paint
C
Melting rubber while stirring it
D
None of these
4
The material generally used for cylinder sleeves is
A
Aluminium
B
Ceramic
C
Cast iron
D
Fibre reinforced plastic
5
When turning a corner
A
The front wheels are toeing out
B
The front wheels are turning on different angles
C
The inside front wheels has a greater angle than the outside wheel
D
All of the above
6
The rolling resistance is because of the friction between the
A
Wheel rim and tyre
B
Tyre and the road surface
C
Wheel rim and road surface
D
None of these
7
When a gear box has four forward speeds and one reverse speed, it is said to be a
A
3-speed gear box
B
4-speed gear box
C
5-speed gear box
D
6-speed gear box
8
The basic purpose of providing caster angle on wheels is to
A
Prevent uneven tyre wear
B
Maintain directional control
C
Bring the road contact of the tyre under the point of load
D
Compensate for wear in the steering linkage
9
The temperature indicating instrument in vehicles indicates the temperature of
A
Engine piston
B
Engine cylinder
C
Lubricating oil
D
Jacket cooling water
10
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
11
How many cells are used in a 12 volt car battery?
A
2
B
4
C
6
D
8
12
The motion of the cam is transferred to the valves through
A
Pistons
B
Rocker arms
C
Camshaft pulley
D
Valve stems
13
The power actually developed inside the engine cylinder is called as
A
Indicated power
B
Brake power
C
Frictional power
D
None of these
14
If the air-fuel mixture in a spark ignition engine is too rich, then air-fuel ratio is about
A
17:1
B
15:1
C
13:1
D
10:1
15
Petrol that detonates easily is called
A
High octane petrol
B
Low octane petro
C
Unleaded petrol
D
Blended fuel
16
The advantage of a tubeless tyre over tube type tyre is
A
Slow air leakage
B
Better fuel efficiency
C
Less chances of running flat
D
All of these
17
In a single dry plate clutch, torsional vibrations are absorbed by
A
Coil springs known as torsional springs
B
Cushion springs
C
Central hub
D
Clutch pedal
18
The battery is an electrochemical device, which means battery
A
Makes chemicals by mechanical means
B
Uses chemical action to provide electricity
C
Has curved plates instead of flat plates
D
Does not use an electrolyte
19
An overinflated tyre will wear the tread most near the
A
Edges
B
Corners
C
Centre
D
None of these
20
The calorific value of Diesel is about
A
36.5 MJ/kg
B
38.5 MJ/kg
C
42.5 MJ/kg
D
45.5 MJ/kg
21
The function of oil control rings is that it
A
Lubricates the cylinder wall by releasing oil from its hole
B
Keeps the cylinder wall lubricated by holding oil in its channel
C
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
D
Maintains a seal and prevents escape of burned gases and oil leakage
22
Two advantages of using helical gears rather than spur gears in a transmission system are
A
Strength and cost
B
Noise level and strength
C
Strength and less end thrust
D
Noise level and economy
23
The correct flow of power through the drive train is
A
Engine drive shafts, clutch, main shaft, counter shaft, final driven gear, wheels
B
Engine clutch, main shaft, counter shaft, final driven gear, drive shafts, wheels
C
Engine clutch, counter shaft, main shaft, final driven gear, drive shafts, wheels
D
Engine main shaft, counter shaft, clutch, final driven gear, drive shafts, wheels
24
An imbalance wheel during vehicle operation
A
Makes large noise when its heavy point hits the road surface
B
Deflects in the vehicle's longitudinal direction
C
Bounces vertically or deflects from side to side (as seen from front or rear)
D
Creates a standing wave
25
The temperature at which tyre inflation pressure should be checked is
A
20°C
B
25°C
C
35°C
D
Ambient temperature
26
The parking brakes employed in vehicles are operated
A
Mechanically
B
Hydraulically
C
Pneumatically
D
None of these
27
In vehicles with tilt steering, the steering column is pivoted in
A
Upper bracket
B
Lower bracket
C
Tilt bracket
D
Steering yoke joint Correct Answer
28
One effect of detonation is
A
Delay in ignition
B
Loss of power
C
Overheating of engine
D
Overcooling of engine
29
In case of a Diesel car, the pressure at the end of compression is of the order of
A
15 bar
B
25 bar
C
45 bar
D
35 bar
30
The effect of vapour locking on the brake performance is that the
A
Brakes function more effectively
B
Brakes fail completely
C
Brake operation is delayed after depression of the brake pedal
D
Vapour locking has no effect on brake performance
31
The connecting rod is attached to the piston by the
A
Cap bolt
B
Piston pin
C
Cap roller bearing
D
Rod cap
32
Clutch facings are usually attached to the plate by
A
Steel rivets
B
Brass rivets
C
Aluminium screws
D
Steel screws
33
In a Diesel engine, the function of a fuel injector is to
A
Mix the fuel and air
B
Ignite the air-fuel mixture
C
Provide flame front for ignition
D
Spray atomized fuel in the cylinder
34
In a four speed four stroke Diesel engine, the intake valve
A
Opens at T.D.C. and closes at B.D.C.
B
Opens at 20° before T.D.C. and closes at 35° after B.D.C.
C
Opens at 10° after T.D.C. and closes at 20° before B.D.C.
D
None of the above
35
When the top of the wheel is tilted outward, then it is called
A
Positive camber
B
Negative camber
C
Positive caster
D
Negative caster
36
The purpose of transmission in an automobile is
A
To vary the speed of automobile
B
To vary the torque at the wheels
C
To vary the power of automobile
D
None of these
37
A basic difference between the spark ignition engine and the Diesel engine is that the
A
Diesel engine compresses air alone instead of an air-fuel mixture
B
Air temperature ignites the fuel in the Diesel engine
C
Fuel is sprayed into the combustion chamber in the Diesel engine as the piston nears T.D.C. on the compression stroke
D
All of the above
38
The cam shaft in an engine is always mounted
A
Parallel to the crankshaft
B
Perpendicular to the crankshaft
C
Inclined to the crankshaft
D
None of these
39
The lower cylindrical portion of the piston which improves piston cooling performance is called
A
Piston crown
B
Connecting rod
C
Piston pin boss
D
Piston skirt
40
The most effective method of controlling S.I. engine exhaust emission is by
A
Recirculating exhaust
B
Using catalytic converter
C
Using some additives in the fuel
D
None of these
41
If clearance volume of I.C. engines is increased, the compression ratio will
A
Increase
B
Decrease
C
Remain constant
D
Be doubled
42
The basic function of the suspension is to
A
Absorbs vibration and impact forces from the road surface
B
Ensure that the steering wheel can deliver a suitable amount of steering force
C
Ensure that wheel alignment is not disturbed during driving
D
Automatically correct the effects of over steering
43
Damper in an automobile is used to
A
Absorb the energy
B
Dissipate the energy
C
Release the energy
D
Increase the energy
44
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
45
The condition that results in large quantities of CO emission is
A
Insufficient air during combustion
B
Insufficient fuel during combustion
C
Low temperature combustion
D
High temperature combustion
46
The sequence order of events in a four stroke engine is
A
Suction exhaust power compression
B
Suction power compression exhaust
C
Suction compression power exhaust
D
Exhaust compression power suction
47
Which of the following is not a part of the chassis?
A
Wheels
B
Front axle
C
Steering system
D
Seats
48
The camshaft of a four stroke Diesel engine running at 1000 rpm will run at
A
500 rpm
B
1000 rpm
C
2000 rpm
D
4000 rpm
49
What type of bearing is used for main bearings and connecting rod bearings?
A
Ball bearings
B
Plain bearings
C
Needle roller bearing
D
Taper roller bearing
50
Valve overlap is the number of degrees of camshaft rotation during which
A
Both valves are closed
B
Both valves are open
C
Both 'A' and 'B'
D
None of these
51
The component that is responsible for converting the rotation of the steering wheel into lateral motion is the
A
Steering wheel
B
Steering shaft
C
Steering gearbox
D
Tie rod
52
The crankcase dilution means
A
Dilution of fuel in the crankcase
B
Dilution of oil by water in the crankcase
C
Dilution of lubrication oil by fuel in the crankcase
D
Dilution of mixture passing through crankcase in two stroke engines
53
The main cause for the change in engine oil viscosity is
A
Humidity
B
Temperature
C
Vibration
D
Contamination
54
The rating of C.I. engine fuel (Diesel) is given by
A
Octane number
B
Performance number
C
Cetane number
D
None of these
55
The operation of removing trapped air from the hydraulic braking system is known as
A
Trapping
B
Tapping
C
Bleeding
D
Cleaning
56
In a four wheel drive (4WD), the numbers of gear boxes are
A
1
B
2
C
3
D
4
57
In an engine, the temperature of the piston will be more at the
A
Crown of the piston
B
Skirt of the piston
C
Piston walls
D
Piston rings
58
The oil pump is driven by the
A
Camshaft
B
Alternator shaft
C
Crankshaft via drive belt
D
Crankshaft directly
59
The condition that causes vapour locking in a brake system is
A
Overheating of the fluid due to frequent brake application
B
Overcooling of the brakes during high speed driving
C
Keeping the vehicle without use for an extended period
D
An excessively high engine speed on a downhill road
60
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.
61
A maintenance free battery
A
Has lead-antimony plate grid
B
Has lead-calcium plate grid
C
Does not contain acid
D
Does not contain water
62
The function of anti-lock brake system (ABS) is that is
A
Reduces the stopping distance
B
Minimizes the brake fade
C
Maintains directional control during braking by preventing the wheels from locking
D
Prevents nose dives during braking and thereby postpones locking of the wheels
63
In a Diesel engine, the fuel is ignited by
A
An electric spark
B
The heat of compression
C
The hot exhaust
D
None of these
64
In a four cylinder inline engine, the number of firing strokes in one revolution of the crank is
A
1
B
2
C
3
D
4
65
The coefficient of rolling resistance for a truck weighing 63,500 N is 0.018. The rolling resistance to the truck is
A
1.143 N
B
11.43 N
C
114.3 N
D
1143 N
66
The Diesel engines as compared to petrol engines require
A
Bigger flywheel
B
Smaller flywheel
C
Same size of flywheel
D
No flywheel
67
The commonly used antifreeze solution in automobiles is
A
Carbon disulphide
B
Ethylene glycol
C
Ammonium chloride
D
Freon-12
68
Engine misfiring is likely to result from
A
Spark plug gap too small
B
Spark plug gap too wide
C
Vapours lock in the fuel only
D
Incorrect fuel air mixture
69
If the valve clearances are excessively large, the problem that can arise is
A
Overheating of the engine
B
Incomplete valve closure
C
Fouling of spark plug by gasoline
D
None of these
70
The power source for a brake booster is
A
Exhaust manifold pressure
B
Electricity
C
The pressure difference between the atmospheric pressure and the vacuum pressure in the intake manifold
D
Hydraulic pump
71
The Diesel engines are also known as
A
Spark ignition (S.I.) engines
B
Compression ignition (C.I.) engines
C
Steam engines
D
None of these
72
The specific gravity of acid in a fully charged battery is generally
A
1.00
B
1.28
C
1.82
D
2.81
73
The gear shift lever requires two separate motions to shift gears, and the first movement
A
Moves the synchronizer
B
Selects the synchronizer
C
Meshes the gears
D
Operates the clutch
74
The gear shift lever requires two separate motions to shift gears, and the first movement
A
Moves the synchronizer
B
Selects the synchronizer
C
Meshes the gears
D
Operates the clutch
75
Which of the following bulb in a car will have the least wattage?
A
Head light bulb
B
Stop light bulb
C
Parking light bulb
D
Ignition warning bulb
76
Wheel base of a vehicle is the
A
Distance between the centres of the front and rear wheels
B
Distance between the centres of the front tyres
C
Distance between the centres of the rear tyres
D
Extreme length of the vehicle
77
A heat treated glass generally used in automobiles bursts into ________ upon cracking,
A
Sharp edged fragments
B
Small particles
C
Large particles
D
None of these
78
A heat treated glass generally used in automobiles bursts into ________ upon cracking,
A
Sharp edged fragments
B
Small particles
C
Large particles
D
None of these
79
Two speed reverse gear arrangements is generally provided in case of
A
Passenger cars
B
Matadors
C
Tractors
D
Trucks
80
Wheel base of a vehicle is the
A
Distance between the centres of the front and rear wheels
B
Distance between the centres of the front tyres
C
Distance between the centres of the rear tyres
D
Distance between the centres of the rear tyres
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