A fire watch is required after hot work operations. How long must the fire watch continue after completion of the hot work?
Correct Answer
A) 30 minutes
OSHA requires a fire watch to continue for at least 30 minutes after completion of welding or cutting operations to ensure no smoldering materials ignite into flames.
Why This Is the Correct Answer
OSHA Standard 29 CFR 1926.352(e) specifically requires that fire watch personnel remain on duty for at least 30 minutes after completion of welding, cutting, or other hot work operations. This 30-minute period is critical because materials can continue to smolder undetected and potentially ignite into flames well after the hot work has stopped. The fire watch ensures immediate response capability during this high-risk period when hidden fires are most likely to develop.
Why the Other Options Are Wrong
Option B: 60 minutes
60 minutes exceeds the OSHA minimum requirement of 30 minutes, though some companies may choose longer periods based on specific conditions or company policy.
Option C: Until the end of the work shift
Requiring fire watch until the end of the work shift is excessive and not mandated by OSHA, though it may be required in special circumstances or high-risk environments.
Memory Technique
Think '30 and done' - 30 minutes minimum fire watch after hot work is done, which rhymes and helps remember the timeframe.
Reference Hint
OSHA Construction Standards 29 CFR 1926.352 - Fire Prevention and Protection, subsection (e) Fire Watch
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