Deck General · Fire Theory & Classes
A fire watch stationed during hot work operations on a vessel is required to remain at the work site for at least how long AFTER welding or cutting operations have stopped?
- A5 minutes
- B30 minutes✓ Correct
- C1 hour
- DUntil the metal has cooled to ambient temperature by touch
Explanation
A fire watch must remain at a hot work location for a minimum of 30 minutes after work stops to detect any smoldering fires in concealed spaces, insulation, or slow-burning combustibles that may have been ignited by sparks or radiant heat. Hot metal can ignite combustibles after the obvious arc or flame is gone. NFPA 51B and USCG hot work guidance both reference this 30-minute requirement.
Authority: Firefighting (USCG deck topic)
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