BC Air Brake Test 10 2025

1. Anti-lock braking systems (ABS) do NOT typically include
2. The anti-lock application cycle is usually called
3. Where is the ABS warning light situated on the trailer?
4. When should you inspect under the back of the vehicle to verify the air tanks are secure and the air lines are tied up and secure?
5. Who has the ultimate responsibility to check that the brakes are working properly before moving the vehicle?
6. Is it necessary to inspect both manual and automatic slack adjusters daily during the pre-trip inspection?
7. Do the regular air brakes continue to function if the anti-lock braking system warning light is out of order?
8. What is the reason for turning off your vehicle's engine while making brake adjustments?
9. Based on the pry method of free stroke measurement, when is a brake adjustment necessary?
10. Following a leak test, what should the minimum confirmed air pressure be in the reservoirs?
11. How can it be determined if a previous slack adjustment has been done incorrectly?
12. When using the pry method of free stroke measurement, what should be the air system psi?
13. What should be the running clearance between the brake lining and drum when correctly adjusted?
14. While checking air brakes, check for wear in all of the following components EXCEPT
15. Who utilizes the applied stroke method when verifying the adjustment of s-cam brakes?
16. What can the expansion of hot brake drums on long downgrades lead to?
17. Once the proper direction is identified, why should the turning continue until solid resistance is felt?
18. Are s-cam brakes generally effective when the brake drum is cool and normal brake application pressure is utilized?
19. To check the slack adjusters, all of the following tools can be useful EXCEPT
20. Is it common for vehicles equipped with air brakes to lose their brakes?
21. Can s-cam brakes be adjusted with high precision while the wheels are on the ground?
22. During a leak test with a firm brake application, the air loss per minute cannot exceed
23. What type of wrench is usually used to turn the adjusting bolt on a manual slack adjuster?
24. Is it typical, especially on tandem axle units, for the adjusting bolts on one axle to adjust in one direction, while the other axle requires an opposite turn?
25. If the axles have manual slack adjusters, what happens if the brakes on one or the other axle have been mistakenly backed off?
26. What is the minimum reservoir pressure required when servicing s-cam brakes via the applied stroke method?
27. How can you tell if the adjusting bolt is being turned in the opposite direction?
28. When adjusting the brakes, what should be the pressure in the air reservoirs?
29. At what distance does the s-cam brakes require adjustment when using the applied stroke method?
30. When you're turning the adjusting bolt on a manual slack adjuster, how can you visually verify that the linings have contacted the drum?
31. Should each brake on an axle be adjusted to have a similar amount of pushrod travel?
32. When adjusting the bolt, why is it important to observe the end of the camshaft?
33. What is the significance of the marking on new air brake chamber pushrods?
34. Do cast iron brake drums expand when they become hot?
35. When you're adjusting a manual slack adjuster, to establish the correct running clearance between the lining and drum, how much should you back off the adjusting bolt?
36. What is usually done with the spring-loaded locking sleeve on most manual slack adjusters?
37. What does the term "pushrod travel" refer to?
38. In the majority of trucks, do the gauges for measuring reservoir pressure typically lack fine markings?
39. According to many automatic slack adjuster manufacturers, what brake application should you make when checking the pushrod stroke?
40. Before you adjust an automatic slack adjuster that has a square adjusting bolt, what must you do first?
41. Piston-type air compressors are NOT available with ______ cylinders.
42. The automatic slack adjusters should be checked by a mechanic at every chassis lubrication interval, every three months, or every _______, whichever comes first.
43. Certain hex caps come with a round 'button' that could be pried up with a screwdriver. Approximately how far can it be pried up?
44. What is a dependable alternative to physically examining brake adjustment?
45. If you make an emergency adjustment of an automatic slack adjuster, is it required to record this on your daily post-trip inspection?
46. When you adjust automatic slack adjusters, backing off may result in considerable force and apparent ratcheting. What does this signify?
47. What does it imply when an automatic slack adjuster strokes beyond the maximum permissible limit?
48. Where can you find the parking brake control valve?
49. What is the purpose of the frequent checks required for automatic slack adjusters?
50. If the pushrod stroke of an automatic slack adjuster is excessive, what could be the cause?