SafetyQuestion 344 of 360
A plumber uses an open flame to solder copper joints near wood framing inside a wall cavity. After finishing the hot work, what fire-safety step is required?
a.Immediately leave the site once the flame is off
b.Spray water on all copper joints
c.Maintain a fire watch for at least 30 minutes after finishing to catch smoldering fires
d.Only check the area if smoke is visible
Explanation
Cal/OSHA hot-work requirements call for a fire watch during hot work and for at least 30 minutes afterward (longer where conditions warrant) because sparks and conducted heat can ignite hidden combustibles that smolder before flaring up. The fire watcher must have extinguishing equipment ready and know how to sound an alarm. Concealed wall and floor cavities are especially prone to delayed ignition.
Law Reference: Cal/OSHA Title 8 §4848Practice all 360 questions free — no signup required.
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