Which of the following is a general safety guideline for welding tanks?

A)

Transport cylinders by rolling them across a surface

B)

Store cylinders in warm, moist areas on a wood floor, near a heat source

C)

Keep valve protection caps in place when cylinders are not in use

D)

Keep valves open when cylinders are empty or not in use, and open them quickly

I believe the answer is C

The correct answer is option (D) Keep valve protection caps in place when cylinders are not in use

Explanation:

For welding tanks, there are several safety guidelines that should be followed in order to prevent danger or any disaster. one of those guidelines is "Keeping valve protection caps in place when cylinders are not in use".

By doing that, there will be no gas leakage from the cylinder.