MC 306 / DOT 406 designation identifies which type of tanker car?

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Prepare for the North Carolina Firefighter Hazardous Materials Exam with targeted flashcards and multiple choice questions. Each question comes with hints and explanations. Equip yourself to succeed!

Multiple Choice

MC 306 / DOT 406 designation identifies which type of tanker car?

Explanation:
The designation MC-306 / DOT-406 identifies a low-pressure liquid cargo tank car. These cars are built to carry liquids at a low internal pressure (not designed for high-pressure gas service), which helps limit vapor release and simplifies safety relief features. This distinguishes them from cars designed for higher-pressure gases (pressurized tank cars) and from those meant for cryogenic, very cold liquids. In short, MC-306 / DOT-406 corresponds to the low‑pressure tank car category.

The designation MC-306 / DOT-406 identifies a low-pressure liquid cargo tank car. These cars are built to carry liquids at a low internal pressure (not designed for high-pressure gas service), which helps limit vapor release and simplifies safety relief features. This distinguishes them from cars designed for higher-pressure gases (pressurized tank cars) and from those meant for cryogenic, very cold liquids. In short, MC-306 / DOT-406 corresponds to the low‑pressure tank car category.

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