The difference between DOT 3 and DOT 4 brake fluids is
DOT 4 fluids have a higher boiling point than DOT 3 fluid
DOT 4 fluids have a lower boiling point than DOT 3 fluid
DOT 3 and DOT 4 fluids have the same boiling point, but DOT 4 fluid has a longer service life
DOT 4 fluid is more resistant to freezing than DOT 3 fluid
Correct Answer :
A. DOT 4 fluids have a higher boiling point than DOT 3 fluid
Related Questions
For the same maximum pressure and temperature
Diesel cycle is more efficient than Otto cycle
Otto cycle is more efficient than Diesel cycle
Both Otto cycle and Diesel cycle are equally efficient
None of the above
The device for smoothening out the power impulses from the engine is called
Clutch
Differential
Flywheel
Torque converter
The motion of the cam is transferred to the valves through
Pistons
Rocker arms
Camshaft pulley
Valve stems
A three way catalytic converter
Re-circulates exhaust gases
Burns fuel vapour gases
Reduces N₂, H₂O, and CO₂ emission levels
Removes CO, HC, and NO₂ from the exhaust gasses passing through it
The basic function of the suspension is to
Absorbs vibration and impact forces from the road surface
Ensure that the steering wheel can deliver a suitable amount of steering force
Ensure that wheel alignment is not disturbed during driving
Automatically correct the effects of over steering
The main function of a resonator is that it
Regulates the intake air flow rate
Reduces the intake air noise
Enhances intake efficiency
Regulates the intake air temperature
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
The function of a connecting rod is
To turn the flywheel
To drive the drive plate
To drive the fuel pump
To transmit motion of the piston to the crankshaft
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 commonly used antifreeze solution in automobiles is
Carbon disulphide
Ethylene glycol
Ammonium chloride
Freon-12
The main cause for the change in engine oil viscosity is
Humidity
Temperature
Vibration
Contamination
The path taken by intake air is
Carburettor (or throttle body) air cleaner intake manifold intake ports cylinders
Air cleaner carburettor (or throttle body) intake ports intake manifold cylinders
Air cleaner intake manifold carburettor (or throttle body) intake ports cylinders
Air cleaner carburettor (or throttle body) intake manifold intake ports cylinders
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
The maximum torque multiplication ratio in a torque converter is about
2.5
10
25
40
The forced fed lubrication system means that the oil is delivered to the engine by
Gravity
The pressure created by the oil pump
Splashing action of the crankshaft
None of these
The main function of the brake fluid is
Lubrication
Power transmission
Cooling
None of these
The main feature of Macpherson strut suspension is that
The vertical size of the suspension can be made more compact
Non vertical external forces are supported by the suspension arms
The unsprung mass in lighter
The assembly is slightly more complicated in design
The frequency of flashing of light per minute in a direction (side turn) indicator is about
9
90
900
9000
The composition of the electrolyte in a fully charged battery is that
The electrolyte is pure distilled water
The electrolyte is pure sulphuric acid
The electrolyte is a mixture of 64% distilled water and 36% sulphuric acid by weight
The electrolyte is a mixture of 90% distilled water and 10% sulphuric acid by weight
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
The main characteristics of a maintenance free (MF) battery is that
A maintenance free battery requires little maintenance during normal use and it is sufficient to add water instead of an electrolyte containing sulphuric acid
A maintenance free battery has a relatively short shelf life when compared with standard batteries
Since it is sealed, the water in maintenance free battery is not lost through evaporation thus accordingly it is not necessary to top up the cells with water
Recharging of a maintenance free battery is neither required nor possible
The formula for Isooctane is
C8H18
C7H17
C6H18
C7H18
The engine oil level should be checked
Immediately after the ignition switch is turned off
While the engine is running
A few minutes after the ignition switch is turned off
While the engine is running at high idle speed
The rigid suspension is beneficial when
It is desired to reduce the unsprung mass
It is desired to have more flexibility in design
It is desired to improve tyre to ground contact characteristics
Large changes in load make it necessary to have a large suspension stroke
The material generally used for cylinder sleeves is
Aluminium
Ceramic
Cast iron
Fibre reinforced plastic
If a tyre is designated as 175/65 R-14 82-S, then the aspect ratio for the tyre is
175
65
14
82
The order in which effort applied to the steering wheel is transferred to the front wheel is
Steering wheel, steering gearbox, steering shaft, tie rod, steering knuckle, front wheels
Steering wheel, steering shaft, steering gearbox, tie rod, steering knuckle, front wheels
Steering wheel, steering shaft, steering gearbox, steering knuckle, tie rod, front wheels
Steering wheel, tie rod, steering gearbox, steering shaft, steering knuckle, front wheels
Which of the following oil is more viscous?
SAE 30
SAE 40
SAE 70
SAE 80
The sequence order of events in a four stroke engine is
Suction exhaust power compression
Suction power compression exhaust
Suction compression power exhaust
Exhaust compression power suction
The starting system includes
A battery, a starter, and an ignition switch
A battery, a distributor, and an ignition switch
A battery, a starter, and a distributor
A distributor, a starter, and an ignition switch