FREE PE Air Brake Practice Test 1 2025
Welcome to the first of our nine Prince Edward Island (PEI) Air Brakes Practice Tests! We designed these practice tests to help you pass the official Air Brakes knowledge test on your first try.
To apply for a commercial driver’s licence in PEI, you must be at least 18 years old (19 for Class 1 and 21 for Class 2 school buses), hold a Class 5 licence, pass a medical exam, and pass a vision test. (For a Class 3 licence, you must have held the Class 5 licence for one year.) Then you must pass a general knowledge test on the theory of commercial driving. However, if you’re applying for a Class 1 licence, you must enroll in Mandatory Entry-Level Training (MELT) before taking the knowledge test.
Passing the general knowledge test will entitle you to a commercial learner’s permit, which will allow you to practice commercial driving under supervision. At this point, you should enroll in an Air Brakes course if you’re applying for an Air Brake endorsement.
When you’re ready, you can schedule a road test for your commercial driver’s licence. However, for a Class 1 licence, you must complete MELT before taking the road test. For an Air Brakes endorsement, you must complete an Air Brakes course, pass an Air Brakes knowledge test, and pass an Air Brakes practical test, all before taking the road test. The Air Brake tests are based on the official PE Air Brake Manual, which is available at Parts for Trucks at 257 Brackley Point Road. The Air Brakes practical test consists of a pre-trip inspection test and a brake function test. You must take the road test in a vehicle that’s representative of the class of licence you’re applying for. For an air brake endorsement, that vehicle must be equipped with air brakes.
Unfortunately, neither reading the official Air Brake Manual nor taking a short Air Brake course can guarantee you’ll pass the Air Brakes knowledge test – certainly not on your first try. But we do!
This Prince Edward Island Air Brakes Practice Test includes 35 multiple-choice questions on air brakes. All questions are up to date as of May 2025 and based on the official Air Brake Manual.
If you get stuck on a practice question, you can ask our AI Assistant to discuss the question in more depth, give you a hint, or answer your own questions about commercial driving. If you still miss the question, the AI Assistant will immediately show you the correct answer and an explanation.
- Should you pump (keep pressing and releasing) air brakes?
- It is important to keep compressed air as dry as possible because
- What does the low air pressure warning device warn you about?
- If the low air pressure warning signal comes on, what should you do?
- The effectiveness of the spring brakes for emergencies or parking
- During normal driving, what keeps the spring brakes released?
- Assuming good traction and constant vehicle weight, if you double your speed, your vehicle's braking distance will be
- If drum brakes overheat, the vehicle's stopping distance will increase. What is the reason for this?
- Air braking systems tend to react slower than hydraulic braking systems because
- While travelling downhill, you notice that each time you want to brake, you must press the brake pedal farther down than the last time to achieve the same braking force. What could be causing this?
- The maximum air pressure available for braking is determined by
- The foot (treadle) valve
- Which of the following can impair braking effectiveness?
- After you apply the service brakes, what happens to that compressed air?
- What does an alcohol evaporator do?
- When you test the system air-loss rate, the maximum acceptable leakage rates per minute after the initial drop are
- You're driving a vehicle equipped with a dual air brake system. The low air pressure warning signal comes on, but one system still has normal pressure. What should you do?
- How should you test your vehicle's low air pressure warning signal?
- An application pressure gauge shows the air pressure
- All vehicles equipped with air brakes must have
- What is the colour coding that is often used for the supply and service lines to the trailer?
- The hand valve of a tractor-trailer
- In a vehicle equipped with air brakes, what does the governor control?
- Polarized gladhands on a tractor
- ln vehicles with three dash-mounted push-pull valve knobs, how are the valve knobs usually coloured?
- Which of the following are major components of the air supply circuit?
- Wedge brakes are designed to be
- Where are the air brake chambers located?
- What does an ABS system do?
- When you are going at twice the speed, your service brakes will need to work _________ to stop your vehicle.
- Which of these significantly decreases the braking force produced at the wheel?
- Which type of trailer can be towed before the service tanks are full?
- In determining how well your air brake system works, which is NOT a significant factor?
- In large commercial vehicles, most air brake systems use automatic valves to
- Where are a vehicle's air tanks located?
- What is the "cut-in" level?
