AB Air Brake Test 10 2025

1. What is a key issue associated with a kinked air line?
2. What is the minimum lining thickness required by the CVSA standards?
3. What is indicated by the term "cammed over"?
4. Which of the following is not a part of the air supply circuit inspection?
5. What leads to brake drums being cracked?
6. Why is it advised not to mix air line fittings?
7. When does a loose air tank result in a failure?
8. Can loose brake chambers still exert some application force to the foundation brakes?
9. What happens when the clevis separates entirely?
10. How do you verify during a vehicle inspection that the air tanks are securely attached?
11. What is the maximum permissible air pressure leakage during the air systems leaks procedure?
12. What leads to bulges in the air lines hoses?
13. If there are system failures that impair braking ability, what action must be taken?
14. In regards to brake lining, what can result in oil saturation?
15. When checking the air compressor and running the engine at 1200 rpm, the low-pressure warning should cease at what psi?
16. If you’re checking the air compressor and the engine is running at 1200 rpm, when should you begin timing based on the air pressure?
17. What can failures in foundation brake components lead to?
18. To bring a vehicle to a halt in the same distance when its weight has been doubled, the braking force should be what?
19. What powers the compressor in a vehicle's air brake system?
20. Where does a compressor pump the air in a vehicle's braking system?
21. What is leveraged to gain a mechanical advantage in a braking system?
22. What causes the wheels to stop spinning in a braking system?
23. What could result from improperly adjusted brakes on one or two wheels of a vehicle?
24. What influences the distance needed to bring a vehicle to a complete stop?
25. What is the device that provides compressed air in a brake system known as?
26. What is a common device used to obtain a mechanical advantage in braking systems?
27. If a vehicle's compressor is belt-driven, what should you inspect the belts for?
28. What term is used to denote air that has been forced into a smaller space?
29. What is transmitted through an air brake system using compressed air?
30. Where does the heat generated from the friction between brake drums and linings go?
31. Which statement is untrue about the stopping distance?
32. In an air brake system, what does the unloading stage signify?
33. If a vehicle's speed is doubled, by how much must the braking force be increased to stop in the same distance?
34. What is the optimal operating temperature for most brake linings?
35. Approximately how long does it take from identifying a hazard to applying the brakes?
36. What is the maximum operating temperature for most brake linings?
37. Above what pressure will the compressor not have to pump air in the system?
38. The compressor must start pumping air into the system by the time that air pressure falls to
39. Which of the following is not one of the main components in a basic air brake system capable of stopping a vehicle?
40. Overheating in brakes could lead to what adverse condition?
41. When both the weight and speed of a vehicle are doubled, the braking force must be adjusted by what factor to stop in the same distance?
42. What term is used to describe the time taken for air to travel through a properly maintained air brake system?
43. When brakes generate heat, where does this heat eventually go?
44. Which component controls when the compressor pumps air by monitoring the minimum and maximum air pressure in the system?
45. What does the friction between brake drums and linings produce in a braking system?
46. What is the determining factor for the amount of heat the brake drums can absorb?
47. What does the term loading stage signify in an air brake system?
48. Why is the sensation different when operating air treadles compared to hydraulic brakes?
49. What is the consequence of not maintaining slack adjusters within their specified limits?
50. What are the alternate names for the primary and secondary reservoirs in an air brake system?