HAZMAT CDL Test 2025 – 400 Free Practice Questions to Pass the Exam

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Question: 1 / 400

If you must leave a placarded vehicle on a public roadway, what is required?

Leave it unattended if possible

It must be parked in a designated area

It must be watched by a qualified person

When a placarded vehicle containing hazardous materials is left unattended on a public roadway, it is essential that it be watched by a qualified person. This requirement is in place to ensure safety and security. A qualified person can monitor the situation, respond to any potential leaks, spills, or accidents, and deter unauthorized access to the vehicle, thus reducing the risk of disaster.

The presence of a qualified person also facilitates immediate action in case of emergencies, ensuring that appropriate protocols are followed. This enhances public safety by helping to mitigate hazards associated with the transportation of dangerous goods.

While the other options may imply alternative courses of action, the requirement to have it watched by a qualified person aligns with safety regulations and best practices in HAZMAT handling.

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