The coefficient of friction for the clutch facing is approximately
0.1
0.4
0.8
1.2
Correct Answer :
B. 0.4
Related Questions
The aluminium alloy is used in cylinder blocks because
It is lighter and has good heat dissipation characteristics
Material cost is low
It does not require any cylinder liners
The piston is also made of aluminium alloy
The ignition in a spark ignition engine takes place when the piston is
Exactly at the T.D.C. position on its compression stroke
Approaching the T.D.C. position on its compression stroke
Leaving the T.D.C. position on its compression stroke
Approaching the T.D.C position on its exhaust stroke
The heat transfer from coolant to air in the radiator of an automobile engine takes place by
Radiation only
Convention only
Convection and radiation
Conduction, convection and radiation
In Diesel engines, the duration between the time of injection and the time of ignition is called
Spill cut-off
Delay period
Injection period
Ignition period
The two rows of cylinders in a 'V' type engine are generally arranged at
45°
60°
90°
130°
In vehicles with tilt steering, the steering column is pivoted in
Upper bracket
Lower bracket
Tilt bracket
Steering yoke joint
The boiling point of Diesel fuel is in the range of
70°C to 100°C
100°C to 120°C
120°C to 180°C
180°C to 360 °C
Two general types of tyres are
Tube type and tubeless
Solid and tubeless
Air and pneumatic
Split rim and drop centre
The basic purpose of tyre rotation on automobiles is to
Avoid ply separation
Equalize wear
Get better ride
None of these
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
The cam shaft in an engine is always mounted
Parallel to the crankshaft
Perpendicular to the crankshaft
Inclined to the crankshaft
None of these
The petrol engines are also known as
Spark ignition (S.I.) engines
Compression ignition (C.I.) engines
Steam engines
None of these
The main purpose of an engine's air cleaner is that it
Controls the engine's air intake volume
Reduces the engine's air intake noise
Prevents rain water from entering the engine
Prevents dust and other foreign matter from entering the engine
The ease with which petrol vaporizes is called its
Oxidation
Octane number
Volatility
Cetane number
The purpose of adding pigment to the paint is that it
Optimises the viscosity of paint
Makes paint film hard
Gives colour and filling up effect to the paint
None of the above
The tyre rotation is generally done at
1000 km
4000 km
6000 km
10000 km
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
In a four cylinder inline engine, the number of firing strokes in one revolution of the crank is
1
2
3
4
The function of a first compression ring (top ring) is that it
Increases the combustion temperature
Creates swirl
Maintains a seal and prevents the fuel leakage
Maintains a seal and prevents escape of burned gases and loss of pressure in the combustion chamber
The engine oil is stored in __________ when the engine is not running.
Oil pan
Cylinder head
Oil pump
Separate oil tank
The firing order for an inline four cylinder I.C. engine is
1-2-3-4
1-3-4-2
1-2-4-3
1-3-2-4
The crankcase dilution means
Dilution of fuel in the crankcase
Dilution of oil by water in the crankcase
Dilution of lubrication oil by fuel in the crankcase
Dilution of mixture passing through crankcase in two stroke engines
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 power actually developed inside the engine cylinder is called as
Indicated power
Brake power
Frictional power
None of these
In order to implement gear changes in the gear unit of an automatic transmission, a ________ is used.
Synchronizer
Planetary gear
Magnetic clutch
Hydraulic multi plate clutch
Which one of the following statements correctly describes the construction of a planetary gear type differential?
The six planetary pinions rotate in constant mesh with the internal gears.
One drive shaft is splined to the central gear and the other to the planetary gear.
Each planetary pinion gear meshes with both the central gear and the internal gear.
The internal gear is fixed to the planetary gear.
The main merit of a multi cylinder type cylinder sleeve is
Smaller engine dimensions
Better cooling efficiency
High rigidity
None of these
The number of exhaust manifolds in a V6 engine is
One
Two
Four
Eight
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 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