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BDifficulty 2/5

On an ADR orange plate showing two numbers, what does the upper number identify?

Correct answer

The goods’ hazard.

The goods’ hazard. The upper hazard identification number has two or three digits and may have an X prefix; the lower number is the substance’s UN number. Not all orange plates carry numbers: format and placement depend on the transport and applicable ADR provisions.

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  • The goods’ hazard.

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