Engine misfiring is likely to result from
1.Spark plug gap too small
2.Spark plug gap too wide
3.Vapours lock in the fuel only
4.Incorrect fuel air mixture
Posted Date:-2021-11-24 14:47:49
If the air-fuel mixture in a spark ignition engine is too rich, then air-fuel ratio is about
1. 17:1
2.15:1
3.13:1
4.10:1
Posted Date:-2021-11-24 13:08:34
In a Diesel engine, the function of a fuel injector is to
1.Mix the fuel and air
2. Ignite the air-fuel mixture
3. Provide flame front for ignition
4.Spray atomized fuel in the cylinder
Posted Date:-2021-11-24 13:57:09
In a four cylinder inline engine, the number of firing strokes in one revolution of the crank is
1.1
2.2
3.3
4.4
Posted Date:-2021-11-24 14:39:32
In a four speed four stroke Diesel engine, the intake valve
1.Opens at T.D.C. and closes at B.D.C.
2.Opens at 20° before T.D.C. and closes at 35° after B.D.C.
3.Opens at 10° after T.D.C. and closes at 20° before B.D.C.
4.None of the above
Posted Date:-2021-11-24 13:59:05
In an engine, the temperature of the piston will be more at the
1.Crown of the piston
2.Skirt of the piston
3.Piston walls
4.Piston rings
Posted Date:-2021-11-24 14:31:19
One effect of detonation is
1.Delay in ignition
2. Loss of power
3.Overheating of engine
4.Overcooling of engine
Posted Date:-2021-11-24 13:51:24
The advantage of a tubeless tyre over tube type tyre is
1.Slow air leakage
2.Better fuel efficiency
3.Less chances of running flat
4.All of these
Posted Date:-2021-11-24 13:11:59
The battery is an electrochemical device, which means battery
1. Makes chemicals by mechanical means
2.Uses chemical action to provide electricity
3.Has curved plates instead of flat plates
4.Does not use an electrolyte
Posted Date:-2021-11-24 13:18:18
The cam shaft in an engine is always mounted
1.Parallel to the crankshaft
2.Perpendicular to the crankshaft
3.Inclined to the crankshaft
4.None of these
Posted Date:-2021-11-24 14:06:58
The coefficient of rolling resistance for a truck weighing 63,500 N is 0.018. The rolling resistance to the truck is
1.1.143 N
2. 11.43 N
3.114.3 N
4. 1143 N
Posted Date:-2021-11-24 14:41:12
The condition that results in large quantities of CO emission is
1. Insufficient air during combustion
2. Insufficient fuel during combustion
3.Low temperature combustion
4.High temperature combustion
Posted Date:-2021-11-24 14:17:36
The function of oil control rings is that it
1.Lubricates the cylinder wall by releasing oil from its hole
2.Keeps the cylinder wall lubricated by holding oil in its channel
3.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
4.Maintains a seal and prevents escape of burned gases and oil leakage
Posted Date:-2021-11-24 13:25:49
The main cause for the change in engine oil viscosity is
1. Humidity
2.Temperature
3.Vibration
4.Contamination
Posted Date:-2021-11-24 14:26:43
The materials used for cylinder block are
1.Cast iron and steel
2.Cast iron and aluminium alloy
3.Steel and aluminium alloy
4.Brass and steel
Posted Date:-2021-11-24 02:11:37
The parking brakes employed in vehicles are operated
1.Mechanically
2.Hydraulically
3.Pneumatically
4.None of these
Posted Date:-2021-11-24 13:41:07
The power source for a brake booster is
1.Exhaust manifold pressure
2.Electricity
3. The pressure difference between the atmospheric pressure and the vacuum pressure in the intake manifold
4.Hydraulic pump
Posted Date:-2021-11-24 14:53:35
The sequence order of events in a four stroke engine is
1.Suction exhaust power compression
2.Suction power compression exhaust
3. Suction compression power exhaust
4.Exhaust compression power suction
Posted Date:-2021-11-24 14:18:49
The temperature indicating instrument in vehicles indicates the temperature of
1.Engine piston
2.Engine cylinder
3.Lubricating oil
4.Jacket cooling water
Posted Date:-2021-11-24 12:58:29
When turning a corner
1.The front wheels are toeing out
2.The front wheels are turning on different angles
3.The inside front wheels has a greater angle than the outside wheel
4.All of the above
Posted Date:-2021-11-24 02:18:01
A basic difference between the spark ignition engine and the Diesel engine is that the
1.Diesel engine compresses air alone instead of an air-fuel mixture
2.Air temperature ignites the fuel in the Diesel engine
3.Fuel is sprayed into the combustion chamber in the Diesel engine as the piston nears T.D.C. on the compression stroke
4.All of the above
Posted Date:-2021-11-24 14:04:25
A heat treated glass generally used in automobiles bursts into ________ upon cracking,
1. Sharp edged fragments
2.Small particles
3.Large particles
4. None of these
Posted Date:-2021-11-24 15:23:33
A heat treated glass generally used in automobiles bursts into ________ upon cracking,
1. Sharp edged fragments
2.Small particles
3.Large particles
4. None of these
Posted Date:-2021-11-24 15:48:36
A maintenance free battery
1.Has lead-antimony plate grid
2.Has lead-calcium plate grid
3.Does not contain acid
4. Does not contain water
Posted Date:-2021-11-24 14:35:57
An imbalance wheel during vehicle operation
1.Makes large noise when its heavy point hits the road surface
2. Deflects in the vehicle's longitudinal direction
3.Bounces vertically or deflects from side to side (as seen from front or rear)
4. Creates a standing wave
Posted Date:-2021-11-24 13:38:21
An overinflated tyre will wear the tread most near the
1.Edges
2.Corners
3.Centre
4.None of these
Posted Date:-2021-11-24 13:19:30
Clutch facings are usually attached to the plate by
1.Steel rivets
2.Brass rivets
3.Aluminium screws
4.Steel screws
Posted Date:-2021-11-24 13:55:59
Damper in an automobile is used to
1.Absorb the energy
2.Dissipate the energy
3.Release the energy
4.Increase the energy
Posted Date:-2021-11-24 14:15:11
How many cells are used in a 12 volt car battery?
1. 2
2.4
3.6
4.8
Posted Date:-2021-11-24 13:02:58
If clearance volume of I.C. engines is increased, the compression ratio will
1. Increase
2.Decrease
3. Remain constant
4. Be doubled
Posted Date:-2021-11-24 14:11:28
If the valve clearances are excessively large, the problem that can arise is
1.Overheating of the engine
2. Incomplete valve closure
3.Fouling of spark plug by gasoline
4.None of these
Posted Date:-2021-11-24 14:50:40
In a Diesel engine, the fuel is ignited by
1.An electric spark
2.The heat of compression
3.The hot exhaust
4.None of these
Posted Date:-2021-11-24 14:39:06
In a four wheel drive (4WD), the numbers of gear boxes are
1.1
2.2
3.3
4.4
Posted Date:-2021-11-24 14:30:23
In a single dry plate clutch, torsional vibrations are absorbed by
1.Coil springs known as torsional springs
2.Cushion springs
3.Central hub
4.Clutch pedal
Posted Date:-2021-11-24 13:13:06
In case of a Diesel car, the pressure at the end of compression is of the order of
1. 15 bar
2.25 bar
3.45 bar
4.35 bar
Posted Date:-2021-11-24 13:52:28
In vehicles with tilt steering, the steering column is pivoted in
1.Upper bracket
2.Lower bracket
3.Tilt bracket
4.Steering yoke joint Correct Answer
Posted Date:-2021-11-24 13:49:27
Petrol that detonates easily is called
1.High octane petrol
2. Low octane petro
3.Unleaded petrol
4.Blended fuel
Posted Date:-2021-11-24 13:10:41
The basic function of the suspension is to
1. Absorbs vibration and impact forces from the road surface
2.Ensure that the steering wheel can deliver a suitable amount of steering force
3.Ensure that wheel alignment is not disturbed during driving
4.Automatically correct the effects of over steering
Posted Date:-2021-11-24 14:12:40
The basic purpose of providing caster angle on wheels is to
1.Prevent uneven tyre wear
2.Maintain directional control
3.Bring the road contact of the tyre under the point of load
4.Compensate for wear in the steering linkage
Posted Date:-2021-11-24 02:22:08
The calorific value of Diesel is about
1. 36.5 MJ/kg
2.38.5 MJ/kg
3.42.5 MJ/kg
4.45.5 MJ/kg
Posted Date:-2021-11-24 13:21:11
The camshaft of a four stroke Diesel engine running at 1000 rpm will run at
1. 500 rpm
2.1000 rpm
3.2000 rpm
4.4000 rpm
Posted Date:-2021-11-24 14:20:53
The commonly used antifreeze solution in automobiles is
1.Carbon disulphide
2. Ethylene glycol
3.Ammonium chloride
4.Freon-12
Posted Date:-2021-11-24 14:45:01
The component that is responsible for converting the rotation of the steering wheel into lateral motion is the
1. Steering wheel
2.Steering shaft
3.Steering gearbox
4.Tie rod
Posted Date:-2021-11-24 14:24:33
The condition that causes vapour locking in a brake system is
1.Overheating of the fluid due to frequent brake application
2.Overcooling of the brakes during high speed driving
3.Keeping the vehicle without use for an extended period
4.An excessively high engine speed on a downhill road
Posted Date:-2021-11-24 14:33:24
The connecting rod is attached to the piston by the
1. Cap bolt
2.Piston pin
3.Cap roller bearing
4.Rod cap
Posted Date:-2021-11-24 13:54:54
The correct flow of power through the drive train is
1.Engine drive shafts, clutch, main shaft, counter shaft, final driven gear, wheels
2.Engine clutch, main shaft, counter shaft, final driven gear, drive shafts, wheels
3.Engine clutch, counter shaft, main shaft, final driven gear, drive shafts, wheels
4.Engine main shaft, counter shaft, clutch, final driven gear, drive shafts, wheels
Posted Date:-2021-11-24 13:34:20
The crankcase dilution means
1.Dilution of fuel in the crankcase
2. Dilution of oil by water in the crankcase
3.Dilution of lubrication oil by fuel in the crankcase
4.Dilution of mixture passing through crankcase in two stroke engines
Posted Date:-2021-11-24 14:25:44
The Diesel engines are also known as
1.Spark ignition (S.I.) engines
2.Compression ignition (C.I.) engines
3. Steam engines
4.None of these
Posted Date:-2021-11-24 14:54:51
The Diesel engines as compared to petrol engines require
1. Bigger flywheel
2.Smaller flywheel
3.Same size of flywheel
4.No flywheel
Posted Date:-2021-11-24 14:42:59
The effect of vapour locking on the brake performance is that the
1.Brakes function more effectively
2.Brakes fail completely
3.Brake operation is delayed after depression of the brake pedal
4.Vapour locking has no effect on brake performance
Posted Date:-2021-11-24 13:53:49
The engine oil is stored in _________ when the engine is not running.
1.Oil pan
2.Cylinder head
3.Oil pump
4.Separate oil tank
Posted Date:-2021-11-24 14:16:23
The function of anti-lock brake system (ABS) is that is
1.Reduces the stopping distance
2. Minimizes the brake fade
3.Maintains directional control during braking by preventing the wheels from locking
4.Prevents nose dives during braking and thereby postpones locking of the wheels
Posted Date:-2021-11-24 14:37:02
The gear shift lever requires two separate motions to shift gears, and the first movement
1. Moves the synchronizer
2.Selects the synchronizer
3.Meshes the gears
4.Operates the clutch
Posted Date:-2021-11-24 14:59:54
The gear shift lever requires two separate motions to shift gears, and the first movement
1. Moves the synchronizer
2.Selects the synchronizer
3.Meshes the gears
4.Operates the clutch
Posted Date:-2021-11-24 15:04:44
The included angle is the sum of the
1. Camber and castor
2.Castor and S.A.I
3.Camber and S.A.I.
4.Camber and toe in
Posted Date:-2021-11-24 02:12:51
The lower cylindrical portion of the piston which improves piston cooling performance is called
1.Piston crown
2. Connecting rod
3. Piston pin boss
4.Piston skirt
Posted Date:-2021-11-24 14:08:56
The material generally used for cylinder sleeves is
1.Aluminium
2.Ceramic
3.Cast iron
4.Fibre reinforced plastic
Posted Date:-2021-11-24 02:15:25
The most effective method of controlling S.I. engine exhaust emission is by
1.Recirculating exhaust
2.Using catalytic converter
3.Using some additives in the fuel
4.None of these
Posted Date:-2021-11-24 14:10:22
The motion of the cam is transferred to the valves through
1.Pistons
2.Rocker arms
3.Camshaft pulley
4. Valve stems
Posted Date:-2021-11-24 13:04:57
The oil pump is driven by the
1.Camshaft
2.Alternator shaft
3. Crankshaft via drive belt
4.Crankshaft directly
Posted Date:-2021-11-24 14:32:23
The operation of removing trapped air from the hydraulic braking system is known as
1.Trapping
2.Tapping
3.Bleeding
4.Cleaning
Posted Date:-2021-11-24 14:29:23
The power actually developed inside the engine cylinder is called as
1.Indicated power
2.Brake power
3.Frictional power
4. None of these
Posted Date:-2021-11-24 13:07:17
The purpose of transmission in an automobile is
1.To vary the speed of automobile
2.To vary the torque at the wheels
3.To vary the power of automobile
4.None of these
Posted Date:-2021-11-24 14:01:46
The rating of C.I. engine fuel (Diesel) is given by
1. Octane number
2.Performance number
3.Cetane number
4.None of these
Posted Date:-2021-11-24 14:28:18
The rolling resistance is because of the friction between the
1.Wheel rim and tyre
2.Tyre and the road surface
3.Wheel rim and road surface
4.None of these
Posted Date:-2021-11-24 02:19:14
The specific gravity of acid in a fully charged battery is generally
1. 1.00
2.1.28
3.1.82
4. 2.81
Posted Date:-2021-11-24 14:55:52
The temperature at which tyre inflation pressure should be checked is
1.20°C
2.25°C
3.35°C
4.Ambient temperature
Posted Date:-2021-11-24 13:39:36
Two advantages of using helical gears rather than spur gears in a transmission system are
1.Strength and cost
2.Noise level and strength
3.Strength and less end thrust
4.Noise level and economy
Posted Date:-2021-11-24 13:32:10
Two general types of tyres are
1.Tube type and tubeless
2.Solid and tubeless
3.Air and pneumatic
4.Split rim and drop centre
Posted Date:-2021-11-24 13:00:45
Two speed reverse gear arrangements is generally provided in case of
1.Passenger cars
2.Matadors
3.Tractors
4.Trucks
Posted Date:-2021-11-24 15:49:39
Valve overlap is the number of degrees of camshaft rotation during which
1.Both valves are closed
2.Both valves are open
3.Both 'A' and 'B'
4.None of these
Posted Date:-2021-11-24 14:23:36
Vulcanizing means
1.Heating rubber under pressure
2.Spraying with special paint
3.Melting rubber while stirring it
4. None of these
Posted Date:-2021-11-24 02:14:16
What type of bearing is used for main bearings and connecting rod bearings?
1. Ball bearings
2.Plain bearings
3.Needle roller bearing
4.Taper roller bearing
Posted Date:-2021-11-24 14:21:47
Wheel base of a vehicle is the
1.Distance between the centres of the front and rear wheels
2.Distance between the centres of the front tyres
3.Distance between the centres of the rear tyres
4.Extreme length of the vehicle
Posted Date:-2021-11-24 15:20:39
Wheel base of a vehicle is the
1.Distance between the centres of the front and rear wheels
2.Distance between the centres of the front tyres
3.Distance between the centres of the rear tyres
4.Distance between the centres of the rear tyres
Posted Date:-2021-11-24 15:53:02
When a gear box has four forward speeds and one reverse speed, it is said to be a
1.3-speed gear box
2.4-speed gear box
3.5-speed gear box
4. 6-speed gear box
Posted Date:-2021-11-24 02:20:48
When the top of the wheel is tilted outward, then it is called
1.Positive camber
2. Negative camber
3.Positive caster
4.Negative caster
Posted Date:-2021-11-24 14:00:23
Which of the following bulb in a car will have the least wattage?
1. Head light bulb
2.Stop light bulb
3.Parking light bulb
4.Ignition warning bulb
Posted Date:-2021-11-24 15:18:31
Which of the following is not a part of the chassis?
1.Wheels
2.Front axle
3.Steering system
4.Seats
Posted Date:-2021-11-24 14:19:38
Which one of the following statements correctly describes the construction of a planetary gear type differential?
1.The six planetary pinions rotate in constant mesh with the internal gears.
2.One drive shaft is splined to the central gear and the other to the planetary gear.
3.Each planetary pinion gear meshes with both the central gear and the internal gear.
4.The internal gear is fixed to the planetary gear.
Posted Date:-2021-11-24 14:34:29