Question

when opening cylinder valves, one should
select one:
a. tum on acetylene first
b. stand to the side of the regulator
c. stand in front of the valves to read the pressure
d. tum on oxygen first
question 19
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Explanation:

When opening cylinder valves (e.g., for gas cylinders in welding or similar processes), safety protocols dictate standing to the side of the regulator to avoid injury from potential valve or regulator malfunctions (like sudden gas release or equipment failure). Option a is incorrect as the order of turning on acetylene first isn't a universal or safe rule in all cases, and d (turning oxygen first) also isn't standard safety. Option c is unsafe as standing in front of valves risks injury from escaping gas or equipment issues.

Answer:

b. Stand to the side of the regulator