When should a fire watch be established?

A fire watch should be established when fire protection systems are impaired and no alternatives are available because this situation poses a heightened risk for fire incidents. When the primary fire protection measures, such as sprinkler systems or fire alarms, are not operational, it is essential to have trained personnel on-site to monitor for signs of fire and take immediate action if necessary.

Establishing a fire watch in this context is crucial for ensuring safety and compliance with fire codes and regulations. It serves as a critical proactive measure to ensure that even in the absence of automated fire suppression or detection systems, individuals are present to react quickly to any emerging fire situations, thereby protecting lives and property.

The other scenarios, such as routine inspections, after a fire drill, or during planned maintenance activities, do not inherently require a fire watch unless there is a specific impairment to fire safety systems. In those cases, while vigilance is important, the same level of focused monitoring as needed during an impairment is not mandated. Thus, option B correctly identifies the key situation that necessitates a fire watch.