In firefighting, what does 'fixed monitor' refer to?

Answer: B — permanently mounted nozzle that can swivel

A fixed monitor refers to a permanently mounted nozzle that can swivel, allowing it to provide coverage over a wider area without the need for constant human operation. This type of equipment is typically installed on rooftops or in strategic locations where it can be deployed quickly to control fires, especially in hard-to-reach areas. The design of a fixed monitor allows firefighters to manage water flow and direction with relative ease, ensuring they can respond effectively to changing conditions on the fireground. It can also be controlled remotely or may be manually adjusted by firefighters after initial setup. In contrast, other types of nozzles often require direct human handling, or they are portable and not permanently affixed to a location. Therefore, the fixed monitor's ability to remain stationary yet adaptable is what distinguishes it from activities that require a firefighter to operate them actively.