When inspecting an air brake system on a straight truck during a pre-trip, you hear a continuous, noticeable air leak. What should be your course of action?

Question: When inspecting an air brake system on a straight truck during a pre-trip, you hear a continuous, noticeable air leak. What should be your course of action?

Answer options:

• It's a normal occurrence; continue with the inspection
• The leak is likely minor; proceed to the destination ✅ The vehicle is unsafe; it must be taken out of service and repaired immediately
• Increase the engine RPM to compensate for air loss

Correct answer: The vehicle is unsafe; it must be taken out of service and repaired immediately

Explanation: Any continuous and noticeable air leak in an air brake system indicates a serious defect that renders the vehicle unsafe for operation and requires immediate repair. (Provincial Driver's Handbook, Air Brake Endorsement section)