PEI Air Brake Knowledge Test Part 4
Preparing for your PEI Air Brake Endorsement (Code E)? Our free, up-to-date PEI Air Brake Knowledge Test are designed to help you pass on your first attempt with full confidence. These practice tests are based on the Official PEI Air Brake Manual, your most trusted resource for understanding how air brake systems work, learning proper inspection procedures, and mastering the essential safety regulations required for commercial drivers in Prince Edward Island.
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What to Expect on the Official PEI Air Brake (Endorsement E) Knowledge Test
To obtain the Air Brake Endorsement (Code E) on your Prince Edward Island commercial driver’s licence, you must successfully complete both a written knowledge test and a practical air brake inspection. Here’s what you can expect for the written portion:
Number of Questions
35
Time Limit
45 minutes
Passing Score
80%
Based On
Where to Write
PEI Air Brake Endorsement (Code E) – Frequently Asked Questions
Any driver operating a commercial vehicle equipped with air brakes in Prince Edward Island must have the Air Brake Endorsement (Code E) added to their licence.
You must hold a valid PEI commercial driver’s licence (Class 1, 2, 3, or 4) and meet the minimum age requirement of 18 years.
The written test includes 35 multiple-choice questions based on the PEI Air Brake Manual, covering system components, operation, inspections, and safety procedures.
You must score at least 80% (28 out of 35 correct answers) to pass the knowledge test.
Yes. You will have 45 minutes to complete the test.
You can write the test at any Access PEI location that offers driver testing services. It’s best to call ahead and book an appointment.
Yes. Bring your current PEI driver’s licence, proof of identity, and fees for testing (if applicable).
Yes. After passing the written test, you must complete a practical air brake inspection test to demonstrate your understanding of pre-trip and brake system checks.
You can retake the test, but you may need to wait a specified period or rebook your appointment. Study the manual and take practice tests before retrying.
Yes. Once added to your licence, the endorsement is recognized across Canada, as long as your licence remains valid and in good standing.
Free PEI Commercial Test Practice – Air Brake (Code E) Endorsement for Class 1, 2, 3, and 4 Drivers
Getting your Air Brake Endorsement (Code E) in Prince Edward Island is a key step toward driving commercial vehicles such as semi-trucks, buses, and other heavy-duty vehicles. Before you hit the road, you must pass both the written air brake knowledge test and a practical air brake inspection, as required by Access PEI and the PEI Highway Safety Division.
Our PEI Air Brake Practice Test is carefully designed to reflect PEI’s testing standards—helping you succeed by focusing on all essential topics covered in the Official PEI Air Brake Manual.
✅ Why Choose Our PEI Air Brake Practice Test?
✅ 100% Based on the Official PEI Air Brake Manual
✅ Same format as the real test at Access PEI locations
✅ 25 multiple-choice questions per test
✅ Instant feedback to help you learn faster
✅ Unlimited free attempts—no sign-up needed
✅ Fully mobile-friendly—study anywhere, anytime
👨🏫 Perfect for Drivers Who Are:
🚛 Preparing for the Air Brake (Code E) Endorsement in Prince Edward Island
🚍 Upgrading to a Class 1, 2, 3, or 4 commercial licence
📦 Moving from another province (e.g. Nova Scotia or New Brunswick)
📘 Searching for accurate and PEI-specific air brake practice material
🎯 Ready to Start?
The road to earning your PEI Air Brake Endorsement (Code E) begins here.
👉 Take the Free PEI Air Brake Practice Test Now
📘 Download the Official PEI Air Brake Manual (PDF)
📺 Watch Our Test Prep Videos on YouTube: @CanadianDriverKnowledgeTest
🌐 Visit: canadiandriverknowledgetest.ca
Air Brake System Components — Know Your Parts Inside and Out
To succeed on the Free PEI Air Brake Practice Test, you must understand how each component of the system works:
Air Compressor: Driven by the engine, it compresses air for the brake system. PEI regulations require a functioning governor to maintain proper cut-in (~85 psi) and cut-out (~135 psi) pressures—just like in our Free PEI Air Brake Practice Test.
Air Tanks (Reservoirs): Store compressed air. Daily draining is required in PEI to prevent corrosion and freezing—key knowledge featured in our Free PEI Air Brake Practice Test.
Brake Chambers: Use air pressure to move a diaphragm and apply the brakes. Inspected frequently for cracks or leaks—these are a critical component in your Free PEI Air Brake Practice Test prep.
Slack Adjusters: Maintain safe pushrod stroke. Knowing manual vs. automatic types is essential to pass the PEI air brake knowledge test.
Governor: Regulates system pressure. Test questions will cover this in your Free PEI Air Brake Practice Test.
Safety Valve: Prevents system overpressure (usually releases at 150 psi). An essential safety device tested in PEI.
🔍 Test Insight: During your practical air brake exam in PEI, you may be asked to identify and explain each component—exactly as practiced in our Free PEI Air Brake Practice Test.
Daily Air Brake Inspections & Leak Tests — Safety Starts Here
Inspection knowledge is essential to pass the Free PEI Air Brake Practice Test and operate safely:
Drain air tanks daily to prevent freezing and corrosion.
Inspect hoses, tanks, and chambers for leaks—frequently tested in PEI.
Check the low-air warning system (should activate at ~60 psi).
Leak Test Standards in PEI:
▪ 3 psi/min loss for single vehicles
▪ 4 psi/min loss for combinations
⚠️ Skipping inspections can lead to test failure and real-world brake failure. Learn the full inspection process in our Free PEI Air Brake Practice Test.
Common Brake System Failures & Emergency Protocols — Know What To Do
Prepare for emergencies—key for the PEI Air Brake Endorsement:
Low Air Pressure: Triggers spring brake application.
Brake Fade: Often caused by overheating. Learn snub braking in our test prep.
Stuck Valves or Brake Drag: Know the symptoms—regularly tested in PEI air brake exams.
Air Pressure Gauges & Monitoring — Master the Instruments
Understanding gauges is a must for the PEI Air Brake Knowledge Test:
Primary & Secondary Gauges: Must read equally and within range.
Governor Operation: Must cycle properly (cut-in ~85 psi / cut-out ~135 psi).
Low-Air Warnings: Should trigger at 60 psi. Know what to do when systems fail.
05. Spring Brakes & Emergency Braking — PEI’s Last Line of Defense
Spring brakes are a critical part of the PEI air brake test:
Engage automatically when pressure falls below 60 psi.
Use only for parking/emergencies—misuse is unsafe and illegal in PEI.
Demonstrate understanding of spring brakes during your practical exam.
Dual Air Brake Systems — Redundancy Saves Lives
Modern PEI commercial vehicles use dual brake systems:
Two Circuits: Usually front and rear.
Separate Reservoirs: Test both during inspections.
Failure Procedures: Know what to do if one system fails—tested in the Free PEI Air Brake Practice Test.
Manual vs Automatic Slack Adjusters — Inspection & Adjustment
Expect slack adjuster questions on your PEI air brake knowledge test:
Manual Adjusters: Must be regularly adjusted.
Automatic Adjusters: Inspect pushrod stroke to ensure compliance.
Learn pushrod stroke limits and adjustment procedures.
Safe Driving Techniques with Air Brakes — Prevent Brake Failure
Driving safely with air brakes is part of your PEI exam and real-world skillset:
Snub Braking: Prevents overheating.
Avoid Riding Brakes: Conserves air pressure.
Use Engine Braking: Especially important on hills or icy roads.
Moisture & Freezing in Air Brake Systems — Cold Climate Hazards
PEI winters pose brake risks—prepare with our practice test:
Moisture buildup can freeze lines.
Drain tanks daily in winter.
Use air dryers or alcohol evaporators where necessary.
Preparing for PEI’s Practical Air Brake Test — Hands-On Skills You Need
Our Free PEI Air Brake Practice Test also helps you prepare for the hands-on exam:
Build system pressure
Test governor cut-in and cut-out
Perform leak and spring brake tests
Measure pushrod stroke
Complete a full system inspection
💡 Practicing these steps boosts confidence for your PEI air brake practical exam.