Breaking Systems
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Question 1 of 20
1. Question
The correct procedure for stopping a lorry equipped with an anti lock braking system in an emergency is to:
Correct
If you’re driving a vehicle with anti-lock brakes and you feel the vehicle beginning to skid you should keep you foot firmly on the brake pedal until the vehicle stops.
Incorrect
If you’re driving a vehicle with anti-lock brakes and you feel the vehicle beginning to skid you should keep you foot firmly on the brake pedal until the vehicle stops.
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Question 2 of 20
2. Question
Changing to a lower gear can be useful in some circumstances. You should do this to help avoid:
Correct
Engaging lower gears and using engine braking will assist you to slow down. This will help to prevent the brake lining from becoming overheated.
Incorrect
Engaging lower gears and using engine braking will assist you to slow down. This will help to prevent the brake lining from becoming overheated.
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Question 3 of 20
3. Question
What causes brake fade?
Correct
The continuous use of the brakes on a long downhill gradient can cause them to overheat and could result in them becoming ineffective.
Incorrect
The continuous use of the brakes on a long downhill gradient can cause them to overheat and could result in them becoming ineffective.
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Question 4 of 20
4. Question
A Jake brake is an additional method of slowing a vehicle down. It works by:
Correct
A Jake brake is a long established system for retarding speed. It alters the valve timing in the engine. This then becomes a compressor and holds back the vehicle speed.
Incorrect
A Jake brake is a long established system for retarding speed. It alters the valve timing in the engine. This then becomes a compressor and holds back the vehicle speed.
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Question 5 of 20
5. Question
You have to drive onto a muddy building site. Why should you switch on your diff-lock?Correct
Engaging the diff-lock means that power is shared between the driven wheels. This reduces the chances of wheel spin.
Incorrect
Engaging the diff-lock means that power is shared between the driven wheels. This reduces the chances of wheel spin.
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Question 6 of 20
6. Question
You are driving a lorry and a trailer. You change to a lower gear when going too fast. This could cause:
Correct
Jack-knifing is usually more than likely to occur with an unladen vehicle, particularly when not travelling in a straight line. Severe braking or selection of a gear too low for your road speed may also cause this.
Incorrect
Jack-knifing is usually more than likely to occur with an unladen vehicle, particularly when not travelling in a straight line. Severe braking or selection of a gear too low for your road speed may also cause this.
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Question 7 of 20
7. Question
Mark three answers. An articulated vehicle is more likely to jack-knife when:
Correct
A combination of sharp braking and excessive steering can cause your vehicle to be become unstable. Jack Knifing is more likely to occur when the vehicle is empty.
Incorrect
A combination of sharp braking and excessive steering can cause your vehicle to be become unstable. Jack Knifing is more likely to occur when the vehicle is empty.
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Question 8 of 20
8. Question
Your lorry is stuck in snow. You use a diff-lock to move off. When should you switch the diff-lock off?
Correct
You must always disengage the diff-lock as soon as the vehicle is moving. The differential allows the rear wheels to revolve at different speeds.
Incorrect
You must always disengage the diff-lock as soon as the vehicle is moving. The differential allows the rear wheels to revolve at different speeds.
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Question 9 of 20
9. Question
Air braking systems usually have two lines. What additional line is fitted on a three-line system?
Correct
Auxiliary air system, usually coloured blue and found mainly on older systems.
Incorrect
Auxiliary air system, usually coloured blue and found mainly on older systems.
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Question 10 of 20
10. Question
To help avoid ‘brake fade’ lorry drivers should ensure that
Correct
It’s important that you engage a low gear as you approach the hill to sure the engine is building up air and can assist with braking.
Incorrect
It’s important that you engage a low gear as you approach the hill to sure the engine is building up air and can assist with braking.
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Question 11 of 20
11. Question
Your vehicle is fitted with a diff-lock. When would you normally use it?
Correct
The differential gears in the drive axle allow the drive wheels to rotate at different speeds. This is very important to enable you to negotiate bends and corners safely.
Incorrect
The differential gears in the drive axle allow the drive wheels to rotate at different speeds. This is very important to enable you to negotiate bends and corners safely.
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Question 12 of 20
12. Question
On a three-line braking system to the trailer of a lorry, what colour is the auxiliary line?
Correct
If you’re driving an articulated vehicle or a trailer combination it’s vital that you understand the rules that apply to coupling and uncoupling the brake lines.
If you’re taking a test with a trailer, you’ll be expected to demonstrate this during your practical test.Incorrect
If you’re driving an articulated vehicle or a trailer combination it’s vital that you understand the rules that apply to coupling and uncoupling the brake lines.
If you’re taking a test with a trailer, you’ll be expected to demonstrate this during your practical test. -
Question 13 of 20
13. Question
The emergency line is common to both two and three-line braking systems. What is its colour?
Correct
The red emergency line is common to both two and three-line braking systems. ALWAYS set the parking brake before disconnecting any brake lines.
Incorrect
The red emergency line is common to both two and three-line braking systems. ALWAYS set the parking brake before disconnecting any brake lines.
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Question 14 of 20
14. Question
Your vehicle is fitted with air-assisted hydraulic brakes. The brake pedal becomes hard to press. What does this mean?
Correct
A fault on the vacuum pump could be the cause of this. It could also be a leaking connection allowing air into the vacuum system.
Incorrect
A fault on the vacuum pump could be the cause of this. It could also be a leaking connection allowing air into the vacuum system.
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Question 15 of 20
15. Question
You vehicle is fitted with a retarder. This has been activated. On which of these would wear be minimized?
Correct
By using the retarder the life of the brake linings is extended. This is because a retarder usually works by acting on the transmission or by applying engine braking.
Incorrect
By using the retarder the life of the brake linings is extended. This is because a retarder usually works by acting on the transmission or by applying engine braking.
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Question 16 of 20
16. Question
Your vehicle is fitted with air brakes. As you start the engine the brake warning light shows, what does this mean?
Correct
It is dangerous to drive a vehicle with low air pressure. To alert you of this, all vehicles are fitted with a warning light and/or buzzer. Do NOT attempt to move your vehicle.
Incorrect
It is dangerous to drive a vehicle with low air pressure. To alert you of this, all vehicles are fitted with a warning light and/or buzzer. Do NOT attempt to move your vehicle.
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Question 17 of 20
17. Question
You are driving a vehicle fitted with a hydraulic brake system. Which of the following should you check before driving away?
Correct
It is important to check all fluid levels during your daily checks, but it is especially important to remember the hydraulic fluid response reservoir. A loss of fluid could lead to brake failure.
Incorrect
It is important to check all fluid levels during your daily checks, but it is especially important to remember the hydraulic fluid response reservoir. A loss of fluid could lead to brake failure.
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Question 18 of 20
18. Question
Your vehicle is fitted with air-assisted hydraulic brakes. What would warn you that there is insufficient air in the system?
Correct
If a warning buzzer or light alerts you to a loss of air pressure you should pull over without delay
You should have sufficient air in reserve to allow you to stop safely. Do not start or continue your journey until this has been repaired.Incorrect
If a warning buzzer or light alerts you to a loss of air pressure you should pull over without delay
You should have sufficient air in reserve to allow you to stop safely. Do not start or continue your journey until this has been repaired. -
Question 19 of 20
19. Question
An endurance brake (retarder) should be used:
Correct
Using an endurance brake on long downhill slopes will help control your speed. Reducing the demand on the service brake helps prevent the brakes overheating and reduces the risk of brake fade.
Incorrect
Using an endurance brake on long downhill slopes will help control your speed. Reducing the demand on the service brake helps prevent the brakes overheating and reduces the risk of brake fade.
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Question 20 of 20
20. Question
An electromagnetic endurance brake (retarder) operates by applying resistance to the
Correct
Electromagnetic retarders work by applying a magnetic resistance to prop shaft which, in turn, slows down the wheels. This allows the service brake to stay cool for optimum performance when required.
Incorrect
Electromagnetic retarders work by applying a magnetic resistance to prop shaft which, in turn, slows down the wheels. This allows the service brake to stay cool for optimum performance when required.
