AB Air Brake Test 10
- Perfect for first-time and renewal commercial applicants, and those adding endorsements
- Based on 2024 AB commercial driver's licence manual
- Triple-checked for accuracy
- Updated for December 2024
questions
correct answers to pass
passing score
- What is a key issue associated with a kinked air line?
- What is the minimum lining thickness required by the CVSA standards?
- What is indicated by the term "cammed over"?
- Which of the following is not a part of the air supply circuit inspection?
- What leads to brake drums being cracked?
- Why is it advised not to mix air line fittings?
- When does a loose air tank result in a failure?
- Can loose brake chambers still exert some application force to the foundation brakes?
- What happens when the clevis separates entirely?
- How do you verify during a vehicle inspection that the air tanks are securely attached?
- What is the maximum permissible air pressure leakage during the air systems leaks procedure?
- What leads to bulges in the air lines hoses?
- If there are system failures that impair braking ability, what action must be taken?
- In regards to brake lining, what can result in oil saturation?
- When checking the air compressor and running the engine at 1200 rpm, the low-pressure warning should cease at what psi?
- 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?
- What can failures in foundation brake components lead to?
- To bring a vehicle to a halt in the same distance when its weight has been doubled, the braking force should be what?
- What powers the compressor in a vehicle's air brake system?
- Where does a compressor pump the air in a vehicle's braking system?
- What is leveraged to gain a mechanical advantage in a braking system?
- What causes the wheels to stop spinning in a braking system?
- What could result from improperly adjusted brakes on one or two wheels of a vehicle?
- What influences the distance needed to bring a vehicle to a complete stop?
- What is the device that provides compressed air in a brake system known as?
- What is a common device used to obtain a mechanical advantage in braking systems?
- If a vehicle's compressor is belt-driven, what should you inspect the belts for?
- What term is used to denote air that has been forced into a smaller space?
- What is transmitted through an air brake system using compressed air?
- Where does the heat generated from the friction between brake drums and linings go?
- Which statement is untrue about the stopping distance?
- In an air brake system, what does the unloading stage signify?
- If a vehicle's speed is doubled, by how much must the braking force be increased to stop in the same distance?
- What is the optimal operating temperature for most brake linings?
- Approximately how long does it take from identifying a hazard to applying the brakes?
- What is the maximum operating temperature for most brake linings?
- Above what pressure will the compressor not have to pump air in the system?
- The compressor must start pumping air into the system by the time that air pressure falls to
- Which of the following is not one of the main components in a basic air brake system capable of stopping a vehicle?
- Overheating in brakes could lead to what adverse condition?
- 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?
- What term is used to describe the time taken for air to travel through a properly maintained air brake system?
- When brakes generate heat, where does this heat eventually go?
- Which component controls when the compressor pumps air by monitoring the minimum and maximum air pressure in the system?
- What does the friction between brake drums and linings produce in a braking system?
- What is the determining factor for the amount of heat the brake drums can absorb?
- What does the term loading stage signify in an air brake system?
- Why is the sensation different when operating air treadles compared to hydraulic brakes?
- What is the consequence of not maintaining slack adjusters within their specified limits?
- What are the alternate names for the primary and secondary reservoirs in an air brake system?