The basic purpose of tyres is to
Grip the road and provide good traction
Substitute for springs
Act as brake
None of these
Correct Answer :
A. Grip the road and provide good traction
Related Questions
The device for smoothening out the power impulses from the engine is called
Clutch
Differential
Flywheel
Torque converter
In a Diesel engine, the function of a fuel injector is to
Mix the fuel and air
Ignite the air-fuel mixture
Provide flame front for ignition
Spray atomized fuel in the cylinder
The fuel pump of a programmed fuel injection (PFI) system operate for two seconds when the ignition is turned to the start position to
Enable the pump's fault diagnosis function to operate
Warm up and lubricate the pump
Supplies a large amount of fuel and thereby creates a choke effect
Pressurise the fuel system before the engine is started
Caster is a
Forward tilt of the kingpin
Backward tilt of the kingpin
Either 'A' or 'B'
None of these
The effect of vapour locking on the brake performance is that the
Brakes function more effectively
Brakes fail completely
Brake operation is delayed after depression of the brake pedal
Vapour locking has no effect on brake performance
The negative plates of a lead acid battery has
Lead peroxide (PbO₂)
Spongy lead (Pb)
Lead sulphate (PbSO₄)
Sulphuric acid (H₂SO₄)
The oil pump is driven by the
Camshaft
Alternator shaft
Crankshaft via drive belt
Crankshaft directly
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 effect of having excess camber is
Excessive steering alignment torque
Hard steering
Too much traction
Uneven tyre wear
If the air-fuel mixture in a spark ignition engine is too rich, then airfuel ratio is about
17 : 1
15 : 1
13 : 1
10 : 1
The air resistance to a car at 20 kmph is R. The air resistance at 40 kmph will be
R
2 R
4R
4 R²
A basic difference between the spark ignition engine and the Diesel engine is that the
Diesel engine compresses air alone instead of an air-fuel mixture
Air temperature ignites the fuel in the Diesel engine
Fuel is sprayed into the combustion chamber in the Diesel engine as the piston nears T.D.C. on the compression stroke
All of the above
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
During braking, the brake shoe is moved outward to force the lining against the
Wheel piston or cylinder
Anchor pin
Brake drum
Wheel rim or axle
The parking brakes employed in vehicles are operated
Mechanically
Hydraulically
Pneumatically
None of these
The component that is responsible for converting the rotation of the steering wheel into lateral motion is the
Steering wheel
Steering shaft
Steering gearbox
Tie rod
The problems caused by the wheel imbalance are
Hard steering and hard ride
Poor acceleration and hard steering
Steering wheel vibrations and uneven tyre wear
Poor acceleration and reduced fuel efficiency
Damper is also known as
Shock absorber
Torsion bar
Spring
Radius rod
The purpose of a cylinder head gasket is to
Prevent the combustion gases from leaking from the joint between the cylinder block and the cylinder head
Prevent engine oil from going into combustion chamber
Removes impurities from cylinder head lubricating oil
None of the above
The specific gravity of Diesel is about
0.65
0.75
0.85
0.95
The two kinds of piston rings are
Compression and oil control rings
Compression and sliding seal rings
Oil scrapper and oil control rings
Pressure and sealing rings
If the engine coolant leaks into the engine oil, then engine oil
Appears milky
Become foamy
Turns black
None of these
The sequence in which the force is transmitted through a brake system when the brake pedal is depressed is
Brake pedal, master cylinder, brake lines, vacuum servo mechanism, brake pads
Brake pedal, vacuum servo mechanism, master cylinder, brake lines, brake pads
Brake pedal, master cylinder, vacuum servo mechanism, brake lines, brake pads
Brake pedal, brake lines, vacuum servo mechanism, master cylinder, brake pads
The antiknock property of compression ignition engine fuel can be improved by adding
Tetraethyl lead
Trimethyl pentane
Amyl nitrate
Hexadecane
The discharged lead acid battery has on its plates
Lead peroxide (PbO₂)
Spongy lead (Pb)
Lead sulphate (PbSO₄)
Sulphuric acid (H₂SO₄)
In a petrol engine, the high voltage for spark plug is in the order of
1000 volts
2000 volts
11 kilovolts
22 kilovolts
The petrol engine works on
Otto cycle
Carnot cycle
Diesel cycle
Rankine cycle
Which of the following bulb in a car will have the least wattage?
Head light bulb
Stop light bulb
Parking light bulb
Ignition warning bulb
If a tyre is designated as 175/65 R-14 82-S, then the aspect ratio for the tyre is
175
65
14
82
A four cylinder engine has a capacity of 2.4 litres. The swept volume of one cylinder is
400 cm³
600 cm³
1200 cm³
2400 cm³