Correct answer
Triangular.
It is a red equilateral triangle with a thermometer symbol, under ADR section 5.3.3. It is a specific mark for substances transported at elevated temperature in the regulated cases, not a generic mark for every dangerous good. Do not confuse it with rectangular orange panels or placards for other hazards.
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Triangular.
Rectangular.
Circular.
The real exam in English is a translation of the Spanish original; compare both here.
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¿Qué forma tiene la marca del ADR que advierte de materias transportadas en caliente?
- Triangular.(Correct answer)
- Rectangular.
- Circular.
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