Which class of standpipe is equipped with a hose connection for untrained personnel?

The correct class of standpipe that is equipped with a hose connection for untrained personnel is Class II. This class is specifically designed for use by the general public or untrained individuals who may need to utilize the standpipe in an emergency situation. Class II standpipes are typically equipped with 1.5-inch hose connections and often include a hose and nozzle that are pre-connected and ready to use. This setup allows individuals without firefighting training to effectively use the equipment during a fire incident, promoting safety and potentially saving lives.

In contrast, Class I standpipes are intended for use by trained firefighters and are not equipped with hoses; they provide 2.5-inch connections for fire suppression. Class III standpipes combine features of Class I and Class II, offering both 2.5-inch and 1.5-inch connections, but they still primarily serve trained personnel. Class IV standpipes are less common and are associated with specific requirements that do not pertain to public use. Thus, Class II is uniquely suited to the needs of untrained personnel in emergency scenarios.