1.
The motion of the cam is transferred to the
valves through
a)
pistons
b) rocker arms
c)
camshaft pulley
d)
valve stems
2.
The condition that causes vapour locking in a
brake system
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
3.
Which of the following symptom is caused as a
result of brake disc run out?
a)
Ineffectiveness of the brakes
b) Judder during braking
c)
Localized wearing of the brake pads
d)
Rapid wearing of the brake pads
4.
If the engine coolant leaks into the engine oil,
then engine
a) appears milky
b)
becomes foamy
c)
turns black
d)
none of these
5.
The function of an alternator in an automobile
¡s 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
6.
A clutch ¡s usually designed to transmit maximum
torque which is
a)
equal to the maximum engine torque
b)
80 per cent of the maximum engine torque
c) 150 per cent of the maximum engine torque
d)
none of these
7.
What type of bearing ¡s used for main bearings
and connecting rod bearings?
a)
Ball bearings
b) Plain bearings
c)
Needle roller bearing
d)
Taper roller bearing
8.
It ¡s necessary to maintain the valve clearances
as they
a)
reduce the resistance to sliding that occurs
between the cam and the tappet
b) allow for lengthening of the valves owing
to the heat of combustion
c)
increase the speed at which the valves move up
and down
d)
make the crankshaft turn smoothly
9.
Incorrect steering axis inclination (S.A.I.)
causes
a)
tendency to assume toe-out orientation
b)
generation of a braking effect at tight corners
c) poor recovery of the steering wheel after
making a turn
d)
the vehicle to pull to the side of lesser inclination
10.
The torque available at the contact between
driving wheels and road is known as
a)
brake effort
b) tractive effort
c)
clutch effort
d)
none of these
11.
A traction control system (TCS) in automobiles
controls the
a)
vibrations on the steering wheel
b)
engine power during acceleration
c) torque that is transmitted by the tyres to
the road surface
d)
stopping distance in case of emergency
12.
In radial tyres
a)
one ply layer runs diagonally one way and
another layer runs diagonally the other way
b) all plies run parallel to one another and
vertical to tyre bead
c)
inner tubes are always used
d)
none of these
13.
The oil pump ¡s driven by the
a)
camshaft
b)
alternator shaft
c)
crankshaft via drive belt
d) crankshaft directly
14.
The vehicle ride will be comfortable if
a) unsprang mass is kept minimum
b)
sprang mass ¡s kept minimum
c)
vehicle mass is kept minimum
d)
all of these
15.
The main function of intake manifold ¡s that it
a)
promotes the mixture of air and fuel
b)
reduces intake noise
c)
cools the intake air to a suitable temperature
d) distributes intake air equally to the cylinders
16.
In automobiles G.V.W. refers to
a)
gross vehicle width
b) gross vehicle weight
c)
gross vehicle wheel base
d)
gross vehicle wheel track
17.
The firing order for an in-line four cylinder
l.C. engine is
a)
1-2-3-4
b) 1-3-4-2
c)
1-2-4-3
d)
1-3-2-4
18.
In a ventilated disc brake,
a)
a duct directs air towards the caliper for
cooling while the vehicle is moving
b)
caliper is covered with cooling fins
c)
disc contains many small holes for optimum
cooling performance
d) disc contains radial vanes between its
rubbing surfaces for optimum cooling performance
19.
The effect of having excess camber ¡s
a)
excessive steering alignment torque
b)
hard steering
c)
too much traction
d) uneven tyre wear
20.
If the air-fuel mixture ¡n a spark ignition
engine ¡s too rich, then air-fuel ratio ¡s about
a)
17:1
b)
15:1
c)
13:1
d) 10:1
21.
The co-efficient of rolling resistance for a
truck weighing 63 500 N is 0.018. The rolling resistance to the truck ¡s
a)
1.143 N
b)
11.43 N
c)
114.3 N
d) 1143 N
22.
If the air-fuel mixture ignites before the spark
takes place at spark plug, the condition ¡s called
a)
detonation
b)
ignition
c) pre-ignition
d)
rumble
23.
The information provided by the oxygen sensor to
the feedback control system is about the
a) air-fuel ratio
b)
air temperature
c)
air flow speed
d)
exhaust gas volume
24.
The diagram which shows the correct crank
positions corresponding to the opening and closing of the valves, is known as
a)
indicator diagram
b)
axial force diagram
c) valve timing diagram
d)
none of these
25.
The difference between DOT 3 and DOT 4 brake
fluids is
a) DOT 4 fluid has a higher boiling point than
DOT 3 fluid
b)
DOT 4 fluid has a lower boiling point than DOT 3
fluid
c)
DOT 3 and DOT 4 fluids have the same boiling
point, but DOT 4 fluid has a longer service life
d)
DOT 4 fluid is more resistant to freezing than
DOT 3 fluid
26.
The battery ¡s 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
27.
The operation of removing trapped air from the
hydraulic braking system ¡s known as
a)
trapping
b)
tapping
c) bleeding
d)
cleaning
28.
The aluminium alloy is used in cylinder blocks
because
a) it ¡s lighter and have good heat
dissipation characteristics
b)
material cost ¡s low
c)
it does not require any cylinder liners
d)
the piston ¡s also made of aluminium alloy
29.
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
30.
The main function of the tread pattern on tyre
¡s 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
31.
The compression ratio in petrol engine is kept
less than in Diesel engine because
a)
¡t 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)
¡t is just customary to have less compression
ratio in petrol engines
32.
The most commonly used supplementary restraint
system (SRS) component is
a)
seat belt
b)
brake
c) airbag
d)
steering
33.
The natural gas ¡s compressed ¡n a CNG cylinder
at a pressure of
a) 200 bar
b)
220 bar
c)
250 bar
d)
300 bar
34.
The cetane rating of Diesel fuel ¡s in the order
of
a)
25
b) 45
c)
70
d)
90
35.
The air gap between the central electrode and
ground (or side) electrode of a spark plug ¡s around
a)
0.2 mm
b)
0.5 mm
c) 1mm
d)
1.5 mm
36.
The cetane number of a Diesel fuel is a measure of
a)
volatility
b)
viscosity
c)
ignition quality
d) delay period
37.
The valve overlap ¡n four stroke petrol engines
is approximately
a) 30°
b)
60°
c)
90°
d)
120°
38.
The petrol engines are also known as
a) spark ignition (S.l) engines
b)
compression ignition (C.l) engines
c)
steam engines
d)
none of these
39.
Which of the following indicates a multi grade
oil?
a)
SAE 30
b)
API SF
c) SAE 20 W-50
d)
API 50
40.
The coefficient of friction for the clutch
facing is approximately
a)
0.1
b) 0.4
c)
0.8
d)
1.2
41.
The component that connects the steering rack to
the knuckles is
a) tie-rod
b)
sector gear
c)
pivot
d)
spline