NL Air Brake Test 7
- Perfect for first-time and renewal commercial applicants, and those adding endorsements
- Based on 2024 NL commercial driver's licence manual
- Triple-checked for accuracy
- Updated for September 2024
![](/img/reviewedby_steven.jpg)
questions
correct answers to pass
passing score
- What could be necessary to maintain adjustment in automatic brake adjusters?
- Who must guarantee that brakes are correctly adjusted?
- What is the one-way check valve's primary role in the brake system?
- What determines the efficiency of the spring parking brake?
- What is the purpose of an automatic limiting valve in an air brake system?
- What is important to do before disassembling spring parking brake chambers?
- How are spring brakes released?
- How can some spring parking brakes be discharged mechanically?
- Where can one typically find instructions on how to cage a spring parking brake?
- What is the functionality count for the relay valve in an air brake system?
- What is the end-point for the control line air in an air brake system?
- What is the risk associated with disassembling a spring parking brake unit?
- What component is fitted on the brake chamber to prevent debris from entering?
- What is an essential step to safely cage the parking brake spring?
- How is the caging of brakes accomplished?
- What can be achieved by installing a control valve in the cab and a front brake limiting valve on the front axle?
- When should you engage the spring parking brake after the brake drums have overheated?
- During a pre-trip air brake inspection, you must ensure that the parking spring brake is not what?
- What does the blue button on some air brake systems apply?
- Besides being a parking brake, the spring parking brake system also functions as what?
- What is referred to as compounding in the context of air brake systems?
- Which of these statements is not true about how quickly the spring brakes will stop the vehicle?
- What happens when the reservoir pressure drops to approximately 35 psi?
- Who should disassemble a spring brake chamber?
- Before a service brake application is made, where should parking brakes be positioned?
- When a heated brake drum begins to cool and contract, what might the pressure from the spring parking brake cause it to do?
- What does it mean to "cage" a spring in the context of air brake systems?
- What position should the control valve be set in for driving on dry road surfaces?
- What action allows reservoir air pressure to flow to the spring parking brake chambers?
- When using an automatic limiting valve, brake applications between 40 psi and 60 psi are reduced to what?
- What occurs to the parking brake spring during normal service brake operation?
- Is the setup of spring parking brakes and their pipe arrangements consistent across all vehicle air brake systems?
- Which of these statements is false about parking a vehicle with overheated brakes?
- What component in the glad hands prevents air from leaking out?
- What happens when the air pressure declines to a range between 20 and 45 psi?
- How many air lines typically lead to the tractor protection valve?
- What is the effect of opening the trailer supply valve?
- What are the alternative names for the trailer supply valve?
- What opens when the driver manually closes the trailer supply valve?
- What is the result of disconnecting the supply line between the tractor and trailer while the trailer is still charged?
- What alternative terminology is used to describe the application line?
- If the driver accidentally uses the hand valve without a trailer being connected, what occurs?
- What should be utilized to prevent dirt and water entry into the coupler and lines when the vehicle is used alone?
- Why should you avoid using the hand valve for parking a trailer?
- When the foot valve treadle is depressed by the driver, where is application air sent?
- Where is a relay emergency valve typically installed?
- In the context of tractor-trailer connection, what does "glad hands" refer to?
- When joining the glad hands, how should the two gaskets and couplers be positioned relative to each other?
- The tractor protection valve is generally situated where?
- If the driver accidentally uses the hand brake without the trailer connected, would there be an air loss?