ICC Certified Fire inspector One Practice Test

How long must fire watch be maintained after hotwork is completed?

1. 30 minutes

2. 1 hour

3. 2 hours

4. 4 hours

The correct answer is: 4 hours

The requirement to maintain a fire watch after hot work is completed is based on the need to ensure that any potential ignition sources are monitored for a sufficient time to prevent a fire from starting. In many fire safety regulations and guidelines, specifically referencing those outlined by agencies like the National Fire Protection Association (NFPA) or other relevant fire codes, a fire watch is often mandated for a duration of at least 4 hours following the completion of hot work activities. This extended time frame reflects the need for vigilance because heat can transfer to nearby combustibles, and residual ignition sources may develop even after the work appears to have been completed safely. The fire watch involves a trained individual remaining in the area to detect and respond to any signs of fire, providing a quick response if an incident occurs. Therefore, maintaining a fire watch for this duration ensures a proactive approach to fire safety, effectively mitigating risks associated with hot work and safeguarding the surrounding environment.