Which symbol on a lorry warns that the load is dangerous when wet?

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Multiple Choice

Which symbol on a lorry warns that the load is dangerous when wet?

Explanation:
Symbols on a lorry carrying dangerous goods tell you how the load behaves and what to watch for. The blue background with the flame is used to warn about loads that become dangerous when they come into contact with water. When moisture is present, these materials can react and may release heat or flammable gas, so they must be kept dry and protected from water sources. That’s why this symbol is the best indicator for a “dangerous when wet” load. The other symbols point to different hazards: a warning about corrosive substances (shown by the test tube affecting skin), a radioactive hazard, or a canister indicating a gas under pressure. These don’t describe the “dangerous when wet” behavior, so they aren’t the correct sign for this specific warning.

Symbols on a lorry carrying dangerous goods tell you how the load behaves and what to watch for. The blue background with the flame is used to warn about loads that become dangerous when they come into contact with water. When moisture is present, these materials can react and may release heat or flammable gas, so they must be kept dry and protected from water sources. That’s why this symbol is the best indicator for a “dangerous when wet” load.

The other symbols point to different hazards: a warning about corrosive substances (shown by the test tube affecting skin), a radioactive hazard, or a canister indicating a gas under pressure. These don’t describe the “dangerous when wet” behavior, so they aren’t the correct sign for this specific warning.

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