Q.1
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.
  • True
  • False
Q.17
Incorrect steering axis inclination (S.A.I.) causes
  • tendency to assume toe-out orientation
  • generation of a braking effect at tight corners
  • 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
0 h : 0 m : 1 s