The operation of removing trapped air from the hydraulic braking system is known as
trapping
tapping
bleeding
cleaning
Q.2.
The battery is an electrochemical device, which means battery
makes chemicals by mechanical means
uses chemical action to provide electricity
has curved plates instead of flat plates
does not use an electrolyte
Q.3.
The diagram which shows the correct crank positions corresponding to the opening and closing of the valves, is known as
indicator diagram
axial force diagram
valve timing diagram
none of these
Q.4.
The information provided by the oxygen (Osensor to the feedback control system is about the
air-fuel ratio
air temperature
air flow speed
exhaust gas volume
Q.5.
If the air-fuel mixture ignites before the spark takes place at spark plug, the condition is called
detonation
ignition
pre-ignition
rumble
Q.6.
The co-efficient of rolling resistance for a truck weighingN is 0.The rolling resistance to the truck is
1.143 N
11.43 N
114.3 N
1143 N
Q.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
Q.8.
If the air-fuel mixture in a spark ignition engine is too rich, then air-fuel ratio is about
17:1
15:1
13:1
10:1
Q.9.
In a ventilated disc brake,
a duct directs air towards the caliper for cooling while the vehicle is moving
caliper is covered with cooling fins
disc contains many small holes for optimum cooling performance
disc contains radial vanes between its rubbing surfaces for optimum cooling performance
Q.10.
Positive camber is used to compensate for wheels tilting inward due to the weight of the vehicle.
Yes
No
Q.11.
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.
Correct
Incorrect
Q.12.
The vehicle ride will be comfortable if
unsprung mass is kept minimum
sprang mass is kept minimum
vehicle mass is kept minimum
all of these
Q.13.
The flywheel and the pressure plate bind the clutch disc between them so that the engine and the transmission can be engaged.
Yes
No
Q.14.
In radial tyres
one ply layer runs diagonally one way and another layer runs diagonally the other way
all plies run parallel to one another and vertical to tyre bead
inner tubes are always used
none of these
Q.15.
A traction control system (TCS) in automobiles controls the
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
Q.16.
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.
poor recovery of the steering wheel after making a turn
the vehicle to pull to the side of lesser inclination
Q.18.
It is necessary to maintain the valve clearances as they
reduce the resistance to sliding that occurs between the cam and the tappet
allow for lengthening of the valves owing to the heat of combustion
increase the speed at which the valves move up and down
make the crankshaft turn smoothly
Q.19.
It is necessary to maintain the valve clearances as they
reduce the resistance to sliding that occurs between the cam and the tappet
allow for lengthening of the valves owing to the heat of combustion
increase the speed at which the valves move up and down
make the crankshaft turn smoothly
Q.20.
What type of bearing is used for main bearings and connecting rod bearings ?
Ballbearings
Plain bearings
Needle roller bearing
Taper roller bearing
Q.21.
What type of bearing is used for main bearings and connecting rod bearings ?
Ballbearings
Plain bearings
Needle roller bearing
Taper roller bearing
Q.22.
The portion of a crankshaft which rests on cylinder block is called main journal.
Yes
No
Q.23.
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
Q.24.
The function of a governor in automobiles is to
Limit the power
Limit the vehicle speed
Maintain constant engine speed
Maximise the fuel economy
Q.25.
The main task of a battery in automobiles is to
Supply electricity to the alternator
Act as a reservoir or stabilizer of electricity
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
Q.26.
When the battery is half (50%) charged, the specific gravity of acid in a battery is usually
0.74
1.00
1.12
1.19
Q.27.
Highest useful compression ratio (HUCR) is the highest compression ratio at which the
Engine can run
Engine gives maximum output
Engine is most efficient
Fuel can be used in a test engine without knocking
Q.28.
A laminated glass upon cracking
Bursts into sharp edged fragments
Bursts into granular pieces
Sandwiched layer traps the fragments
Breaks into the form of crystals
Q.29.
The self ignition temperature of Diesel as compared to petrol is
Higher
Lower
Same
Depends on fuel quality
Q.30.
The Diesel engines are also known as
Spark ignition (S.I.) engines
Compression ignition (I.) engines
Steam engines
None of these
Q.31.
The petrol engines are also known as
Spark ignition (S.I.) engines
Compression ignition (I.) engines
Steam engines
None of these
Q.32.
A worm gear is used as the pinion for the rack and pinion type of steering gearbox, because it
Improves steering comfort when steering wheel is turned to effect small changes in the direction of forward motion
Allows the steering wheel to be turned by a greater amount when steering
Makes the steering more responsive
Reduces the amount of kickback for large steering angles
Q.33.
The correct way to rectify an imbalanced wheel is to
Adjust the tyre pressure
Rotate the tyres
Adjust the damper spring tension
Attach appropriate weights to the wheel at appropriate positions
Q.34.
An under-inflated tyre will wear the tread most
Near the centre
Near the edges
In the lateral direction
In the cross direction
Q.35.
The purpose of a balancer shaft is to
Balance the timing in the movement of the two groups of pistons
Increase inertia force of the rotating crankshaft
Reduce vibrations caused by the crankshaft rotation
Adjusts the timing of the intake and exhaust valve openings
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