AB Air Brake Test 9 2025

1. To what are Hydraulic Driveline Retarders comparable?
2. Antilock Brake Systems (ABS) are managed by sensors, modulators and a computer. An ABS modulator is NOT positioned
3. What would a heavy weight at the trailer's front cause the drive axles to possess?
4. In the use of runaway lanes, which of these is false?
5. Brake management systems are efficient, when should drivers trust them?
6. From which year have ABS brakes been compulsory on all air-brake trucks, buses, and trailers?
7. To safely descend in rural areas, which statement is incorrect?
8. What extra steps does a driver need to take with a vehicle equipped with a Stability Control System?
9. During the pre-hill inspection, which essential brake inspection must be performed at the very least?
10. Ideally, when should en-route inspections be performed?
11. Which system is replaced by the Stability Control System?
12. If wheel spin is detected by the ATC system, what is the response?
13. What is not part of an in-service brake check?
14. When should your brakes be inspected when going down a steep hill?
15. During a vehicle inspection, can a vehicle be operated even if it has a minor defect?
16. During an on-route air brake inspection during the shift, which statement is incorrect?
17. What is tested when the engine is running?
18. The ATC dashboard light illuminates under certain circumstances. What does a flashing light imply?
19. During the Tractor Protection System test, the trailer air supply valve should pop out at what pressure?
20. During the air brake inspection in the daily inspection, when should the trailer be inspected?
21. Regulations govern the legal requirements for vehicle inspections. How often do industry best practices require vehicles to be inspected?
22. What unusual vehicle behaviour does the Stability Control System correct?
23. When are carriers required to receive the commercial vehicle inspection report?
24. Which systems has technological advancement significantly improved?
25. The Air Brake Practical Test form's procedure primarily serves as what?
26. At what point during the pre-trip inspection is the air system examined for leaks?
27. Which statement about testing the automatic feature of the park control valve is incorrect?
28. Which statement is incorrect regarding the pre-hill brake inspection?
29. What is considered a minor flaw in the air brake system?
30. At how many psi should the low air pressure warning turn on during the Tractor Protection System test?
31. What needs to be done if new components have been added to the vehicle after the daily inspection?
32. Which statement is false regarding the purpose of the Commercial Vehicle Safety Regulation of the Traffic Safety Act?
33. The trailer air supply valve can be automatically tripped by the park control valve. How can you do this?
34. Which is not considered a major defect in the air brake system?
35. Which statement is false about conducting a post-trip air brake inspection?
36. When should the inspection report be available for peace officers?
37. When are drivers required to incorporate the air brake pre-trip inspections?
38. What is a consequence of brake lining failure?
39. How many psi should the governor cut out at during a check?
40. When checking the air compressor, at what psi should you stop timing when the engine is running at 1200 rpm?
41. Within the commercial vehicle industry, what does "CVSA" stand for?
42. What is the objective of the system leaks procedure?
43. Which air line is not filled during the air systems leaks procedure?
44. What leads to chafed air lines?
45. What occurs once a plastic air line becomes kinked?
46. How would you confirm that the brake chamber has been securely mounted?
47. Is blocking off the air lines that supply the failed component an acceptable way to deal with air system failures?
48. What leads to the widening of cracks in the brake drums, eventually causing the drum to come apart?
49. What could cause the clevis pins to slowly dislodge?
50. In the case of any visible damage or corrosion in brake chambers or clamp rings, who is competent enough to carry out the repair work?