When securing an oxy-acetylene cutting outfit for an extended period, you should close the __________.

Correct Answer: Option A — cylinder valves and close torch valves when pressure in hoses and regulators is zero

Securing an oxy-acetylene outfit requires closing cylinder valves first, then bleeding all gas from the hoses and regulators by opening torch valves. This ensures no residual pressure remains in the system, preventing hose degradation or accidental gas release while the equipment is stored for extended periods.