Heavy Duty Equipment Technician Red Seal Exam Prep · Question
A heavy-duty truck with air brakes experiences a sudden complete loss of air pressure while driving. What is the immediate and most critical safety action that should occur?
Air brake systems are designed with spring brakes that engage automatically when air pressure drops below a safe operating level. This is a crucial safety featu
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Question: A heavy-duty truck with air brakes experiences a sudden complete loss of air pressure while driving. What is the immediate and most critical safety action that should occur?
Answer options: ✅ The parking brake will automatically engage.
- The service brakes will immediately lock the wheels.
- The engine will automatically shut down.
- The steering system will become inoperable.
Correct answer: The parking brake will automatically engage.
Explanation: Air brake systems are designed with spring brakes that engage automatically when air pressure drops below a safe operating level. This is a crucial safety feature to stop the vehicle in an emergency.
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