How do you activate the CMWD system?

The CMWD (Commonly used Mitigation and Water Deluge) system is typically activated through localized controls, specifically local switches located near check valves, and often requires the presence of fire pumps to work effectively. This method ensures that the system can be operated in a controlled manner, allowing for quick response in the event of a fire while utilizing nearby infrastructure to ensure optimal functionality.

This option accurately reflects how such systems are designed to operate in many facilities, where manual intervention or site-specific controls are typically favored for immediate response. The need for fire pumps acknowledges the requirement for sufficient water pressure and flow, which is crucial for the operational capability of the CMWD system during an emergency.

In contrast, other options suggest different activation methods that do not align with the standard practices and operational protocols associated with CMWD systems. For instance, automatic activation upon fire detection does not account for manual controls that may be integral in a given facility's emergency plan. Likewise, reliance solely on remote control could overlook the necessity of direct, localized control, especially in urgent situations where time is critical. The idea of using a main power switch also implies a level of centralized control that is not representative of the immediate local response required for effective fire mitigation.