- Based on 2025 NS commercial driver's licence manual
- Updated for January 2025
NS Air Brake Test 6
Ready to pass your Nova Scotia Air Brake Endorsement Test? This practice test is specifically designed to help you get your endorsement for air brake-equipped commercial vehicles in Nova Scotia. Updated for 2025, it features 50 multiple-choice questions that follow the guidelines and topics set by the official commercial driver's manual. Our questions are designed to be challenging, covering both basic and advanced air brake system topics. Besides air brake operations, this test also covers related safety rules, including the proper techniques for inspecting and maintaining air brake systems. This test is essential for anyone aspiring to drive a commercial vehicle with air brakes in the province. Whether you're new to the commercial driving scene or an experienced driver looking to renew or upgrade your licence, this test is an invaluable resource. Boost your confidence and knowledge today!
- Perfect for first-time and renewal commercial applicants, and those adding endorsements
- Triple-checked for accuracy
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What you need to know
Verified by Steven Litvintchouk, M.S., Chief Educational Researcher, Member of ACES. See our detailed commitment to accuracy and quality in our practice tests.
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What to expect on the official exam
50
questions
40
correct answers to pass
80
passing score
Our commitment to accuracy and quality in our practice tests
Explore our rigorous, multi-tiered verification process that ensures each question mirrors the official manual for unparalleled accuracy.
Written by Andrei Zakhareuski Updated over a week ago
At Tests.ca, we understand the importance of reliable and accurate practice tests to help you prepare for your driver's knowledge exam. That's why we've developed a meticulous process to create and continually update our practice questions, ensuring they reflect the most current driving laws and regulations.
Here's an inside look at how we maintain the highest quality in our practice tests.
Content Creation and Verification Process
- Alignment with Official Driving Handbooks:
Every question we develop is based on the most recent version of each province's official driving manual. Our team regularly monitors each province's official website for the latest updates to ensure our practice tests are always aligned with the most current information. - Community Feedback Integration:
We leverage feedback from our vast community of users to understand which topics are most frequently tested. This helps us focus on the areas that are most relevant and beneficial for your preparation. - Expert Content Creation:
Our in-house editor, Steven, who has extensive experience in driver education, crafts each question with precision. He conducts a thorough review of each question against the official manuals to ensure accuracy. - Rigorous Review Process:
Once Steven has finalized a set of questions, our team conducts a joint review session. This second level of scrutiny involves content accuracy, proofreading, and fact-checking to eliminate any errors. - User Feedback Mechanism:
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Our thorough quality control process ensures that you have access to practice tests that are as accurate and up-to-date as possible. We believe in the power of well-prepared drivers and are dedicated to providing you with the best study tools to help you succeed on your driver's knowledge exam.
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List of questions (classic view)
- Why is an air dryer needed in an air brake system?
- Upon driver releasing the treadle in an air brake system, to where does the air get directed?
- What influences the quantity and size of reservoirs on a vehicle with an air brake system?
- What function does the slack adjuster perform in an air brake system?
- What does it mean if the safety valve must relieve pressure in an air brake system?
- Is it necessary to inspect automatic reservoir drain valves every day in an air brake system?
- Where would one typically find the brake chamber mounted in a vehicle?
- Where does the pressurized air go as the compressor's piston approaches its peak stroke in an air brake system?
- What is an alternate term for the supply reservoir in an air brake system?
- What function does the heater element in the purge valve perform in an air dryer?
- How is the push rod linked to the slack adjuster in an air brake system?
- What could be a possible outcome if sludge accumulated in the bottom of the air brake system's tank?
- What circumstances would prevent a compressor from being able to increase air pressure from 50 to 90 psi within three minutes?
- At what pressure is a safety valve normally set in an air brake system?
- What happens to the heated air from the compressor as it cools down in the supply reservoir?
- What is the crank arm-type lever the push rod is connected to known as in an air brake system?
- What causes the air in the air brake system's cylinder to compress?
- How is a brake chamber in an air brake system separated internally?
- Whereabouts in the air brake system would one typically install an air dryer?
- What purpose does a safety valve serve in an air brake system?
- What distinguishes the front axle brake chambers from the rear axle brake chambers in an air brake system?
- How frequently should the tanks in an air brake system be drained?
- What happens if there's a leak in the diaphragm of a brake chamber in the air brake system?
- What's another term for an automatic reservoir drain valve in an air brake system?
- What is the reason for installing the brake chamber and slack adjuster on the backing-plate of a front axle assembly?
- What are some advantages of air-over-hydraulic brake systems?
- Who is usually responsible for manual adjustment of wedge brakes?
- Which are not usually found in commercial vehicles?
- Which of these factors would not cause an automatic slack adjuster to fail in maintaining the proper slack?
- How can drivers track service tank air pressures?
- What air brake system doesn't necessitate an air brake endorsement?
- What's a type of low-pressure warning device used predominantly in old vehicles?
- Which statement is incorrect? Air over hydraulic brake systems were created for medium-weight vehicles because...
- What psi triggers the low-pressure indicator light or alarm due to overuse or leaks?
- Is it necessary to check automatic slack adjusters?
- An air-over-hydraulic brake system is most alike to which system?
- What must the low-pressure warning system comprise of?
- What does the stoplight switch do?
- What does the air line from the foot valve to the relay valve function as?
- When the warning system is triggered, what action must a driver take?
- Why is a quick release valve necessary in the braking system?
- Can a device showing application air pressure be added to the dashboard when brakes are applied?
- What should be the maximum angle between the push rod and the arm of the slack adjuster when brakes are fully applied?
- What determines the amount of heat the brakes can absorb and radiate into the surrounding air?
- Which is false? Extremely unreliable brake performance can come from...
- When the slack adjusters turn the S-cams, what happens?
- On manual slack adjusters, the adjusting bolt is turned until the brake linings touch the drums and then backed off by how much?
- Where is the one-way check valve installed?
- Which of these could cause brake fading or the reduction in braking power occur?
- Where is a relay valve usually installed?