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Which of the following is a general safety guideline for welding tanks? A) Transport cylinders by rolling them across a surface B) Keep valves open when cylinders are empty or not in use, and open them quickly C) Store cylinders in warm, moist areas on a wood floor, near a heat source D) Keep valve protection caps in place when cylinders are not in use

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PBCHEM

ANSWER: D) Keep valve protection caps in place when cylinders are not in use

EXPLANATION: Amongst all the other options, Option D which mentions to keep valve protection caps in place when cylinders are not in use is the right one. In the general safety guideline of welding tanks, it is mentioned that the cap shall protect cylinders when not in use. This is to prevent any gas from leaking out and cause any disaster.