Final answer:
In sprinkler systems, an approved motor gong, bell, horn, or strobe light is required. Strobe lights provide visual indication of an alarm condition. They are used to attract attention and alert individuals, particularly those with hearing impairments.
Step-by-step explanation:
In sprinkler systems, an approved motor gong, bell, horn, or __________ is required. The missing item is a strobe light. Strobe lights are used in conjunction with the audible alarms to provide visual indication of an alarm condition. During an emergency, the strobe light flashes to attract attention and alert individuals who may have difficulty hearing the audible alarm.
Strobe lights are commonly used in buildings to comply with safety regulations and help ensure the safety of occupants. They are especially important in areas where individuals with hearing impairments may be present.
For example, in a hotel or hospital, strobe lights can be installed in hallways, common areas, and guest rooms to visually alert guests and staff in the event of a fire or other emergency.