Braking Systems and Technique Flashcards
6 cards from real PCV practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 6 Braking Systems and Technique flashcards as text
What is the purpose of an anti-lock braking system (ABS) on a PCV?
Answer: To prevent the wheels from locking under heavy braking, allowing the driver to maintain steering control
ABS prevents wheel lock-up during heavy braking, allowing the driver to continue steering the vehicle.
When descending a long steep hill in a coach, you should primarily use:
Answer: A lower gear and engine braking, supplemented by the exhaust brake or retarder
Engine braking through a lower gear, combined with an exhaust brake or retarder, controls speed on descents without overheating the service brakes.
What is brake fade?
Answer: A reduction in braking efficiency caused by excessive heat in the braking system
Brake fade occurs when brakes overheat from prolonged use, reducing their ability to slow the vehicle.
How does an exhaust brake work on a diesel PCV?
Answer: It restricts exhaust gas flow, creating back pressure that slows the engine and drivetrain
An exhaust brake restricts exhaust gas flow, creating back pressure that resists engine rotation.
You notice the brake warning light illuminates while driving your bus. What should you do?
Answer: Stop in a safe place as soon as possible and do not drive until the fault is investigated
A brake warning light indicates a potentially serious fault. You must stop safely and have the issue investigated.
What should you check about the air brake system during your daily walk-around check?
Answer: Air pressure build-up rate, any audible air leaks, brake operation, and warning device function
A thorough air brake check includes verifying pressure build-up, listening for leaks, testing brake operation, and checking warning devices.