In Spark Ignition Engine
Only air is introduced into the cylinder
The mixture of air and fuel is introduced into the cylinder from carburettor
Both A and B
None of these
Correct Answer :
B. The mixture of air and fuel is introduced into the cylinder from carburettor
Related Questions
The instrument used to check specific gravity of acid in a battery is
Hydrometer
Hygrometer
Anemometer
Multimeter
The octane number of compressed natural gas (CNG) is
90
100
110
120
The information provided by the oxygen (O₂) sensor to the feedback control system is about the
Air-fuel ratio
Air temperature
Air flow speed
Exhaust gas volume
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
In a single dry plate clutch, torsional vibrations are absorbed by
Coil springs known as torsional springs
Cushion springs
Central hub
Clutch pedal
In which of the following conditions, the idle CO percentage should be measured with the vehicle?
Headlights and other electrical devices are switched off
Headlights and other electrical devices are switched on
Headlights and other lights are switched off
Headlights are switched on
The function of a radiator fan in the cooling system is that
It blows air through the radiator when necessary
It is turned by wind force as the vehicle moves forward, and its rotation drives the water pump
It cools the engine by blowing air onto the cylinder block
It draws heat out of the engine compartment
When the front wheels of a vehicle are locked during braking, then
Stopping distance becomes extremely long
Front tyres skid across the road surface, and the vehicle spins around
Rear tyres skid across the road surface, and the vehicle spins around
Driver loses control over the steering, and the vehicle continues moving in its current direction
In comparison with a radial tyre, one advantage of a bias ply tyre is
Longer life
Lower rolling resistance
Smoother ride at low speeds
None of these
Which of the following symptom is caused as a result of brake disc run out?
Ineffectiveness of the brakes
Judder during braking
Localized wearing of the brake pads
Rapid wearing of the brake pads
When a gear box has four forward speeds and one reverse speed, it is said to be a
3-speed gear box
4-speed gear box
5-speed gear box
6-speed gear box
The compression ratio in petrol engine is kept less than in Diesel engine because
It makes petrol engines lighter
Higher or equivalent compression ratio in petrol engines is not possible due to pre-ignition
Less compression ratio gives better performance
It is just customary to have less compression ratio in petrol engines
Petrol that detonates easily is called
High octane petrol
Low octane petrol
Unleaded petrol
Blended fuel
The basic purpose of providing caster angle on wheels is to
Prevent uneven tyre wear
Maintain directional control
Bring the road contact of the tyre under the point of load
Compensate for wear in the steering linkage
The motion of the cam is transferred to the valves through
Pistons
Rocker arms
Camshaft pulley
Valve stems
The timing belt is attached to the camshaft pulley and
Timing belt drive pulley
Distributor
Radiator fan pulley
Alternator pulley
The size of engine cylinder is referred in terms of its
Diameter and bore
Displacement and efficiency
Bore and stroke
Bore and length
Damper in an automobile is used to
Absorb the energy
Dissipate the energy
Release the energy
Increase the energy
Which of the following oil is more viscous?
SAE 30
SAE 40
SAE 70
SAE 80
The effect of having excess camber is
Excessive steering alignment torque
Hard steering
Too much traction
Uneven tyre wear
The fuel pump in the programmed fuel injection (PFI) system is located
Between the fuel filler pipe and fuel tank
In the fuel tank
On the distributor mounting in the engine compartment
On the engine compartment bulkhead
The specific gravity of Diesel is about
0.65
0.75
0.85
0.95
The petrol engines are also known as
Spark ignition (S.I.) engines
Compression ignition (C.I.) engines
Steam engines
None of these
The lubrication oil flow in an engine is in the order as
Oil strainer, oil pump, relief valve, oil filter, cylinder block, cylinder head and oil pan
Oil pump, oil strainer, relief valve, oil filter, cylinder block, cylinder head and oil pan
Oil strainer, oil filter, relief valve, oil pump, cylinder block, cylinder head and oil pan
Oil strainer, oil pump, relief valve, oil filter, cylinder head, cylinder block and oil pan
The temperature indicating instrument in vehicles indicates the temperature of
Engine piston
Engine cylinder
Lubricating oil
Jacket cooling water
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
The characteristic that is enhanced by the use of cylinder sleeves is
Cooling efficiency
Resistance to wear
Lubrication performance
None of these
The gear shift lever requires two separate motions to shift gears, and the first movement
Moves the synchronizer
Selects the synchronizer
Meshes the gears
Operates the clutch
The brake warning light warns the driver of
Water in the master cylinder
Air in the hydraulic system
Failure of the primary or secondary circuit of hydraulic system
Power brake failure
The firing order for an opposed four cylinder l.C. engine is
1-2-3-4
1-3-4-2
1-4-3-2
1-3-2-4