ON Air Brake Test 10
- Perfect for first-time and renewal commercial applicants, and those adding endorsements
- Based on 2024 ON commercial driver's licence manual
- Triple-checked for accuracy
- Updated for October 2024
questions
correct answers to pass
passing score
- Why are automatic slack adjusters utilized?
- As brakes wear naturally, what happens to the brake pushrod stroke?
- An air dryer purge occurs at about the same time as
- What is the most distinct and permanent feature used to identify long-stroke brake chambers?
- Which is not correct? During a brake adjustment inspection, you should mark the pushrod at the brake chamber or a suitable fixed reference point with...
- When testing the low-air warning system, how often should you engage and disengage the brake pedal?
- Given that adjustment limits depend on the size and type of air-brake chamber, what do you need to identify?
- What happens when brakes with manual slack adjusters are improperly adjusted?
- When conducting a vehicle inspection, why is it advisable to park on level ground?
- Which statement is not true? Long-stroke brake chambers can be identified by...
- How far should you drain the air supply tank while inspecting the air-tank drain valves?
- The pushrod stroke of each air brake chamber should not exceed...
- When measuring the air-loss rate, why should the initial drop in pressure be ignored?
- How many methods are there to measure the applied pushrod stroke?
- When does a vehicle fail the air-tank drain valves test?
- When inspecting brake adjustment, how should the pushrod marks be?
- In Ontario, who is qualified to re-adjust manual slack adjusters?
- Brake wear occurs at different rates depending on...?
- 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?