Braking Systems Heavy Vehicle by theorytestuk.co.uk | Aug 12, 2023 | 0 comments Welcome to your Braking Systems Heavy Vehicle 1. 15. What should you do if the brake air-pressure warning light comes on while you're driving? Stop and get help without delay Report the fault when you return to your depot Build up the pressure by accelerating Drain the air tanks and continue normally 2. 41. When is trailer swing most likely to occur on a lorry and drawbar combination? While you're braking on a bend While you're using an endurance brake While you're steering at slow speed and fully loaded While you're moving off at an angle 3. 50. What system is used to control a vehicle's speed without using the footbrake? A secondary brake An endurance brake (retarder) A differential lock An emergency air system 4. 58. Your vehicle is fitted with an air-assisted hydraulic braking system. What would warn you that the air compressor is not working? The brake pedal feels spongy when pressed The brake pedal has little resistance The brake pedal feels hard when pressed The brake pedal travels a long way 5. 46. You're driving a vehicle fitted with anti-lock brakes. What should you do when braking in an emergency? 'Pump' the brake pedal harshly Apply minimum force to the brake pedal Use the exhaust brake (retarder) before the footbrake Apply firm, continuous pressure to the brake pedal 6. 14. Your vehicle has anti-lock brakes. How does this affect you when you're braking normally? There's no need to alter the way you brake You'll be able to brake much later You'll need to brake more firmly There's no need to brake so early 7. 11. What should anti-lock brakes let you do when you have to stop in an emergency? Brake more gently Brake much later Maintain steering control Stop over a long distance 8. 53. You're driving an articulated lorry that has three air lines connected to the trailer. What's the purpose of the red line? It's the emergency line It's the service line It's the auxiliary line It's the electrical line 9. 37. Where must extra care be taken when using an endurance brake (retarder)? On uneven roads On slippery roads On downhill gradients On uphill gradients 10. 12. You're stationary. The brake air-pressure warning light comes on. Why should you keep the parking brake on? Because the vehicle will suddenly roll backwards Because it will cause the air pressure to rise Because the service brake may not stop you Because it will make the warning light go out 11. 44. What could prevent air pressure from building up in an air-brake system in frosty weather? Moisture in the air may form bubbles in the brake fluid The air will contract, reducing the pressure The dampness may cause valves to rust Moisture drawn in with the air may freeze and cause a blockage 12. 8. Your vehicle is fitted with an anti-lock braking system. What's it designed to allow you to do? Drive at faster speeds Brake much later than normal Apply the brakes more quickly Stop safely in an emergency 13. 33. Your vehicle is fitted with an anti-lock braking system. When should you check that it's working properly? Before each service At the start of each working day At the start of each working week Before every journey 14. 40. What does changing to a lower gear on a long downhill gradient help to avoid? Brake fade Clutch slip Excessive engine revs Tyre wear 15. 45. Which coloured band on the rev counter makes the best use of engine braking? Blue Red Amber Green 16. 4. Your vehicle is fitted with hydraulic brakes. Why might the brake pedal go down too far when it's pressed? There's too much fluid in the braking system he pedal travel requires adjustment The vacuum exhauster isn't working There isn't enough fluid in the braking system 17. 48. You're driving down a snow-covered hill. Why should you take care when using an independent endurance brake (retarder)? Your brakes could overheat Your speed could increase Compressed air could escape The drive wheels could lock 18. 43. What should you do when driving a large vehicle down a steep hill? Partly apply the parking brake Select the vehicle's highest gear Use the endurance brake Put the gear lever into neutral 19. 2. Your vehicle is fitted with air-assisted hydraulic brakes. What would warn you that there isn't enough air in the system? An increase in pressure on the air gauge A buzzer or light The exhaust brake won't work Brake fade 20. 25. What should you do after driving through a flood? Carry out an emergency stop Drive in a low gear with the footbrake lightly applied Avoid braking until the brakes have dried out Pump the footbrake when approaching hazards 21. 32. Your vehicle is fitted with air-assisted hydraulic brakes. What fault would you suspect if the brake pedal becomes hard to press? The brake system has a loss of air pressure The brake linings are worn The brake shoes need adjusting The brake system requires more fluid 22. 38. Which component will last longer when you use a retarder? The brake linings The catalytic converter The exhaust system The transmission 23. 52. You're about to drive an unfamiliar vehicle. What should you do if you think there may be moisture in the air-brake reservoir? Assume the system has automatic drain valves Find out whether you need to drain the system manually Nothing; it's the vehicle owner's responsibility Leave the engine running for a while before driving 24. 18. When is an articulated vehicle most at risk of jack-knifing? When it's fitted with an endurance brake (retarder) While it's manoeuvring slowly While it's under heavy braking When it's fully loaded 25. 10. What's 'brake fade'? Reduction of air pressure Smooth progressive braking Reduction of braking effectiveness Low hydraulic brake fluid level 26. 56. Your vehicle is fitted with a 'diff-lock'. When would you normally use it? While driving on straight roads While towing an empty trailer While driving on muddy construction sites While uncoupling a trailer 27. 28. What should you do when an air-pressure warning device activates? Continue to drive the vehicle Drain the air tanks Stop and have the fault put right Pump the brake pedal repeatedly 28. 6. You're driving a tractor unit fitted with two air lines. 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 The trailer service line should be left unconnected Only the service line should be connected Only the auxiliary line should be connected 29. 47. Your vehicle is fitted with air brakes. What does it mean if a brake warning light shows when you've just started the engine? Low air pressure Increased air pressure The parking brake isn't working The air reservoirs are fully charged 30. 59. When can an endurance brake (retarder) be especially useful? While driving down long hills When driving on steep cambers As a way to reduce gear changes To improve fuel consumption 31. 24. What colour is the auxiliary line on a three-line braking system? Red Blue Green Yellow 32. 17. How can you help to prevent 'brake fade'? Use the endurance brake Apply the parking brake Select neutral for a short distance Repeatedly pump the brake pedal 33. 1. You're about to drive a vehicle fitted with hydraulic brakes. What should you check before driving the vehicle? The hydraulic-brake fluid level The power-steering fluid level The cooling-system fluid level The windscreen-washer fluid level 34. 55. What can coasting downhill seriously affect? The air brakes The cooling system The tachograph The electrical systems 35. 3. Your tractor unit has three air lines. You're connecting to a trailer that has two air-line couplings. What colour is the line you shouldn't connect to the trailer? Red Yellow Black Blue 36. 20. You've just started the engine. What must you do if the brake air-pressure warning light is showing? Report it as a fault Keep the parking brake on Switch your engine off Engage the clutch 37. 16. What causes 'brake fade'? Continuous use of the brakes Repeated pumping of the brakes Loss of air pressure in the system Badly worn brake pads 38. 57. You're driving down a long hill. What should you use to prevent the brakes from overheating? The anti-lock braking system The footbrake The secondary brake The endurance brake (retarder) 39. 31. 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 Cover the air tanks with a blanket Keep the engine at high revs when starting Pump the brakes 40. 49. When does 'brake fade' occur? When the brakes get too hot When the brakes get too cold When the brakes get too dry When the brakes get too wet 41. 27. What will 'pumping' the brake pedal in a vehicle fitted with anti-lock brakes cause? Increased effectiveness Reduced effectiveness Reduced brake wear Increased brake wear 42. 19. When are exhaust brakes most efficient? At high engine speed, while in low gears At low engine speed, while in high gears During stop/start town work While travelling at a constant speed on a motorway 43. 5. Your vehicle is fully loaded. Where should you be braking when dealing with bends? As close to the bend as possible As you start to turn the wheel When halfway around the bend When driving in a straight line 44. 54. You're driving an articulated lorry. What could happen if you change to a lower gear while you're going too fast? The vehicle could jack-knife The engine could stall The trailer could uncouple 45. 30. You're about to drive a vehicle fitted with air-assisted hydraulic brakes. Why might the brake pedal feel hard when you press it? The air compressor is not working The pedal movement needs adjusting The brakes are locked on fully The brake-fluid reservoir is empty 46. 36. What's the principal braking system on a lorry called? The endurance brake The service brake The parking brake The jake brake 47. 29. A lorry is overtaking you on a two-lane motorway. What should you do if it doesn't have the speed to get past? Continue at the same speed Be prepared to reduce your speed Increase your speed and force the lorry to drop back Brake hard to allow the other driver to cut in 48. 26. You have to drive onto a muddy building site. Why should you switch on your diff-lock? To make your steering lighter To improve your fuel consumption To increase your engine power To make the wheels less likely to spin 49. 35. When would you use an escape lane? When motorways merge When carrying a dangerous cargo When your brakes have failed When emergency repairs are needed 50. 7. '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 journey On a long downhill gradient On the approach to hazards On a long uphill gradient 51. 39. Air-brake systems usually have two lines. Which additional line is fitted on a three-line system? Emergency Service Electrical Auxiliary 52. 34. The emergency line is common to both two-line and three-line brake systems. What colour is it? Red Blue Black Yellow 53. 23. How will anti-lock brakes improve your vehicle's safety? They allow you to follow other vehicles more closely They help you keep steering control while braking heavily They let you drive faster on wet roads They enable you to brake later than normal 54. 21. You're about to drive a vehicle fitted with hydraulic brakes. What should you check before driving the vehicle? The hydraulic-brake fluid level The power-steering fluid level The cooling-system fluid level The windscreen-washer fluid level 55. 22. Your lorry is stuck in snow. You use the diff-lock to move off. When should you switch the diff-lock off? Only after selecting top gear Once the engine has warmed up As soon as the vehicle is moving As soon as the snow has cleared 56. 42. Where would you see an escape lane? Outside a fire station Alongside a bus lane Before a motorway exit Down a steep hill 57. 13. When should an endurance brake (retarder) be used? On motorways only When braking quickly When you stop or park On long downhill slopes 58. 51. How can a lorry driver avoid brake fade? Ensure that the air tanks are drained before journeys Check that the air pressure is correct Make sure that the parking brake is applied before stopping Select an appropriate gear before downhill gradients 59. 9. What should you avoid when using an independent endurance brake (retarder) on slippery roads? The front wheels spinning The drive wheels locking Brake-pad wear Anti-skid road surfaces Time's up Submit a Comment Cancel replyYour email address will not be published. Required fields are marked *Comment * Name * Email * Website Save my name, email, and website in this browser for the next time I comment.