BC Air Brake Knowledge Test study plan

Name the major components of a basic air brake system and state in one sentence what each component does.

Trace the path of compressed air from the compressor through the governor, reservoirs, and valves to the brake chambers.

Explain how the foot valve, relay valve, and slack adjusters work together during an application and a release.

Distinguish the service brake, parking brake, and emergency brake circuits by drawing them as three separate lines.

Describe how a spring brake chamber applies the brakes when air pressure drops, and why this is a fail-safe design.

Describe how the compressor builds pressure and how the governor signals it to stop and restart.

Explain what the air dryer removes from the system and what happens when its desiccant is saturated.

Identify the wet, primary, and secondary reservoirs and explain the purpose of each check valve between them.

State the typical governor cut-in and cut-out pressures and explain why a gap between them is designed into the system.

List the pre-trip inspection items for the air supply in the order you would actually check them at the vehicle.

Perform a pressure build-up check from zero and record how long the system takes to reach governor cut-out.

Run a static leak test with the brakes released and again with the brakes fully applied, recording both pressure drops.

Inspect the compressor belt and mounts, drain every reservoir, and check that the low-pressure warning activates.

Sequence the full pre-trip inspection into a repeatable walk-around order you can perform without notes.

Demonstrate the tug test and measure pushrod stroke on each brake chamber against the legal limit.

Test the tractor protection valve and trailer supply line by simulating a breakaway and recording the result.

Explain what each failed test means and state which defects would place the vehicle out of service.

Explain how controlled braking differs from stab braking and when each technique is used.

Describe how to use the trailer hand valve and the engine retarder correctly, including when each must be avoided.

Identify the correct braking response for downgrades, wet surfaces, and low-traction conditions.

Adjust the seat, mirrors, and controls, then perform a stationary brake application check before moving off.

Explain how the emergency brake system engages automatically when system pressure falls to a set level.

Describe the steps to bring a vehicle to a controlled stop after a sudden loss of air pressure while moving.

Diagnose common faults such as a slow leak, a stuck relay valve, or a dragging brake from the symptoms they produce.

State the safe procedure for parking on a grade, including chocking wheels and releasing spring brakes for recovery.

Explain what causes brake fade on long downgrades and describe how to prevent it before it starts.

List the warning signs of a compressor failure and outline the actions a driver must take when they appear.

Describe the procedure for a runaway vehicle situation, including escape ramp use and gear selection.

Explain when a driver must stop operating and place the vehicle out of service, and how to document the defect.

Review every missed question from earlier weeks and restate the correct reasoning in your own words.

Complete three timed practice tests and score each one against the passing standard for your province.

Re-perform the full pre-trip inspection cold, without notes, to confirm retention of the sequence.

Recite the key pressure values, leak limits, and pushrod stroke limits from memory with no reference.