Class 4 Commercial Driver Practice · Question
During a pre-trip inspection of a vehicle with hydraulic brakes, what is a sign of a potential brake failure?
When testing hydraulic brakes, you should apply firm pressure. If the pedal moves toward the floor (fades) while being held, there is likely a leak or a system
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Question: During a pre-trip inspection of a vehicle with hydraulic brakes, what is a sign of a potential brake failure?
Answer options:
- The pedal feels firm and does not move.
- The pedal has a slight springy feel. ✅ The pedal fades or moves slowly toward the floor.
- The pedal requires two pumps to become firm.
Correct answer: The pedal fades or moves slowly toward the floor.
Explanation: When testing hydraulic brakes, you should apply firm pressure. If the pedal moves toward the floor (fades) while being held, there is likely a leak or a system failure.
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Question explanations
- What should you do if your accelerator pedal sticks while you are driving?
- What type of information should a Class 4 driver generally NOT include in their daily trip records or logbook
- When operating a taxi or small bus, when are you required to ensure passengers are using seatbelts?
- What is the correct procedure for a small bus driver approaching an uncontrolled railway crossing?
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