During hot work operations, a fire watch must be maintained for how long after completion of the work?
Correct Answer
D) 30 minutes
OSHA requires fire watch to continue for at least 30 minutes after completion of hot work operations to ensure no smoldering or delayed ignition occurs. This helps prevent fires from developing after work is completed.
Why This Is the Correct Answer
OSHA 29 CFR 1926.352(e) specifically requires that fire watch personnel remain on duty for at least 30 minutes after completion of welding or cutting operations. This 30-minute period is critical because materials can continue to smolder or ignite even after the hot work appears to be finished. The fire watch ensures immediate response to any delayed ignition that could occur from residual heat or sparks that may have traveled to combustible materials.
Why the Other Options Are Wrong
Option A: 1 hour
2 hours exceeds the OSHA requirement and would be impractical for most construction operations, though some company policies may require longer periods for specific high-risk situations.
Option B: 15 minutes
While 1 hour would provide additional safety, OSHA specifically mandates a minimum of 30 minutes, making this answer unnecessarily long and not the standard requirement.
Memory Technique
Think 'Thirty minutes Till Safe' - hot work needs 30 minutes of watching before the area is considered safe from delayed ignition.
Reference Hint
OSHA Construction Standards 29 CFR 1926 Subpart J - Welding and Cutting, specifically section 1926.352(e) for fire prevention requirements
More Project Mgmt Questions
What is the minimum R-value required for wall insulation in Florida Climate Zone 2?
A subcontractor brings a new chemical product to your jobsite. Under the Globally Harmonized System (GHS), what information must be immediately available to workers?
A construction site has a trench that is 8 feet deep in Type B soil. What is the maximum allowable slope ratio for the trench walls without protective systems?
What is the maximum recommended spacing between drywall screws when attaching to wood studs?
Your crew discovers suspected asbestos-containing materials during a renovation project. What is the first action you should take?
A scaffold platform is 12 feet long and 5 feet wide. If the maximum load capacity is 25 pounds per square foot, what is the total weight capacity of this platform?
Which CSI MasterFormat Division would contain specifications for fire-stopping and firesafing materials?
In tilt-up concrete construction, what is the primary advantage of this method over conventional cast-in-place construction?
Which OSHA standard specifically addresses construction industry safety and health regulations?
A structural drawing shows a beam labeled 'W12x26'. What does the '26' represent?
People Also Study
Business & Financial Management
120 questions · 70% to pass
Contract Administration
60 questions · 70% to pass