Class 4 Commercial Driver Practice · Question
When testing hydraulic brakes, what does a 'spongy' feel in the brake pedal usually indicate?
If the pedal feels 'spongy,' it usually indicates air in the hydraulic lines, which is a major defect that makes the vehicle unsafe to drive.
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Question: When testing hydraulic brakes, what does a 'spongy' feel in the brake pedal usually indicate?
Answer options:
- The brake pads are new and need breaking in
- The parking brake is engaged ✅ There is air in the hydraulic lines or a leak
- The brake fluid is cold
Correct answer: There is air in the hydraulic lines or a leak
Explanation: If the pedal feels 'spongy,' it usually indicates air in the hydraulic lines, which is a major defect that makes the vehicle unsafe to drive.
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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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