Which feature identifies a MC 307/DOT 407 tanker?

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Multiple Choice

Which feature identifies a MC 307/DOT 407 tanker?

Explanation:
Recognizing MC 307/DOT 407 tankers comes down to top-access design and safety features. These non‑pressurized liquid cargo tanks have a single manhole assembly on the top, and that manhole is protected by both a flash box and rollover protection. The flash box helps contain and reduce the risk of ignition from any vented vapors, while the rollover protection guards the manhole assembly in a rollover, preventing damage and leaks. This combination is a distinctive identifying feature of MC 307/DOT 407 tankers. Other features listed, like an elliptical rear, exposed fittings, or a dome on top, aren’t unique to this tanker type and aren’t reliable identifiers.

Recognizing MC 307/DOT 407 tankers comes down to top-access design and safety features. These non‑pressurized liquid cargo tanks have a single manhole assembly on the top, and that manhole is protected by both a flash box and rollover protection. The flash box helps contain and reduce the risk of ignition from any vented vapors, while the rollover protection guards the manhole assembly in a rollover, preventing damage and leaks. This combination is a distinctive identifying feature of MC 307/DOT 407 tankers. Other features listed, like an elliptical rear, exposed fittings, or a dome on top, aren’t unique to this tanker type and aren’t reliable identifiers.

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