Breaking System Flashcards
Youre Driving a vehicle fitted with anti-lock brakes. What should you do when braking in an emergency
Apply firm, continuous pressure to the brake pedal
Your vehicle has anti-lock brakes. How does this affect you when youre braking normally
Theres no need to alter the way you brake
The emergency line is common to both two line and three line brake systems. what colour is it
Red
What causes Brake fade
continuous use of the brakes
Which component will last longer when you use a retarder
The brake lining
When are exhaust brakes most efficient
At high engine speed while in low gears
You have to drive onto a muddy building site. Why should you switch off your driff-lock
To make the wheels less likely to spin
What should you do if the brake air- pressure warning light comes on while youre driving
stop and get help without delay
Your vehicle is fitted with hydraulic brake . Why might the brake pedal go down too far when its pressed.
There isnt enough fluid in the braking system
Whats brake fade?
Reduction of braking effectiveness
Whats the principal braking system on a lorry called
The service brake
what should you do when driving a large vehicle down a steep hill
use the endurance brake
What can coasting downhill seriously affect
The air brakes
Your vehicle if fully loaded where should you be braking when dealing with bends
When driving in a straight line
Your lorry is equipped with anti-lock brake. Whats the correct procedure for stopping in an emergecny
Apply the footbrake firmly and continuously until the vehicle has stopped
Where would you see a escape lane
down a steep hill
Youre about to drive an unfamiliar vehicle. What should you do if you think there may be moisture in the air-brake reservoir
Find out whether you need to drain the system manually
When would you use an escape lane
when the brakes have failed
Youve just started the engine. What must you do if the brake air pressure warning light is showing
Keep the parking brake on
Youre driving down a long hill what should you use to prevent the brakes from overheating
The endurance brake (Retarder)
When is trailer swing most likely to occur on a lorry and drawbar combination
While youre braking on a bend
Your vehicle is fitted with an antilock braking system. When should you check that its working properly
Before every journey
Your vehicle is fitted with an anti lock braking system. Whats it designed to allow you to do
Stop safely in an emergency
A Lorry is overtaking you on a two lane motorway. what should you do if it doesnt have the speed to get past
Be prepared to reduce your speed
your vehicle is fitted with an air assisted hydraulic braking system. What would warn you that the vacuum pump isnt working
The brake pedal feels hard when pressed
What system is used to control a vehicle speed without using the footbrake
An endurance brake (retarder)
How will antilock brakes improve your vehicles safety
They help you keep steering control while braking heavily
What could prevent air pressure from building up in an air brake system in frosty weather
Moisture drawn in with the air may freeze and cause a blockage
In frosty weather what. precaution could a lorry driver take to prevent moisture from freezing in the air brake system
Drain the air tanks daily
Youre stationary the brake air pressure warning light comes on. Why should you keep the parking brake on
Because the service brake may not stop you
What colour is the auxiliary line on a three line braking system
blue
What should anti lock brakes let you do when you have to stop an emergency
Maintain steering control
How can you help to prevent brake fade
use the endurance brake
when should an endurance brake (retarder) be used
On a long downhill slopes
What should you avoid when using an independent endurance brake (retarder) on slippery roads
The drive wheels locking
your vehicle is fitted with air-assisted hydraulic brakes. What would warn you that there isnt enough air in the system
A buzzer or light
Where must extra care be taken when using an endurance brake (retarder)
On slippery roads
How can a lorry driver avoid a break fade
select an appropriate gear before going downhill gradients
What does changing to a lower gear on a long downhill gradient help to avoid
Brake fade
Your vehicle is fitted with air brake . What does it mean if a break warning light shows when youve just started the engine
Low air pressure
Youre driving an articulated lorry that has three air lines connected to the trailer. Whats the purpose of the red line
Its the emergency line
Youre driving an articulated lorry. What could happen if you change to a lower gear while youre going too fast
The vehicle could jack-knife
When can an endurance brake (retarder) be especially useful
While driving down long hills
When is an articulated vehicle most at risk of jack-knifing
While its under heavy braking
What should you do when an air-pressure warning device activates
Stop and have the fault put right
Your lorry is stuck in snow. You use the difflock to move off. When should you switch the diff lock off?
As soon as the vehicle is moving
Youre about to drive a vehicle fitted with air-assisted hydraulic brakes. Why might the brake pedal feel hard when you press it
The vacuum pump isnt working
your vehicle is fitted with a diff-lcok. When would you normally use it
while driving on a muddy construction sites
Your tractor unit has three air lines youre connecting to a trailer that has two air-line couplings. What colour is the line you shouldnt connect to the trailer
BLUE
Your vehicle is fitted with air assisted hydraulic brakes. What would you suspect if the brake pedal become shard to press
The brake system has a loss of vacuum
Youre about to drive a vehicle fitted with hydraulic brakes . What should you check before driving the vehicle
The hydraulic-brake fluid level
What will ‘pumping’ the brake pedal in a vehicle fitted with anti-lock brakes cause
reduced effectiveness
Air-brake systems usually have two lines. Which additional line is fitted on a three-line system
Auxiliary
Youre driving a tractor unit fitted with two airlines. you want to couple to a trailer that has three air-line couplings. How should the air lines be connected
The trailer auxiliary line should be left unconnected
What should you do after driving through a flood.
Drive in a low gear with the footbrake lightly applied
Which coloured band on the rev counter makes the best use of engine braking
Blue
Youre driving down a snow covered hill. Why should you take care when using an independent endurance brake (retarder)
The drive wheels could lock
When does ‘Brake Fade’ occur
When the brakes get too hot
‘Brake Fade’ is a loss of effectiveness of the brakes when they overheat. When would ‘brake fade’ be most likely to happen
on a long downhill gradient
