Why is it necessary to limit the lowest stream angle of a portable monitor?

Limiting the lowest stream angle of a portable monitor is crucial to prevent instability of the monitor. When the stream is directed at a very low angle, it can create significant thrust against the monitor. This force can destabilize the equipment, making it prone to tipping over or shifting from its intended position. A stable monitor is essential for effective firefighting operations, as it allows for precise control of the water stream and ensures that firefighters can accurately direct water at the fire without risk of losing control over the monitor.

The design and operation of portable monitors typically consider the physics of water flow and the forces involved. By maintaining an appropriate stream angle, firefighters can ensure that the monitor remains safely positioned, maximizing both safety and efficiency in firefighting efforts.