Which term describes an alarm signal indicating an emergency requiring immediate action by occupants?

• A. trouble
• B. alarm
• C. supervisory
• D. code red

Answer: (B)

An alarm is the signal that tells occupants to act immediately in an emergency. When an alarm sounds, it indicates a condition that requires urgent action, such as evacuating the area or following the preplanned emergency procedures. Other signals have different meanings: a trouble alert means a fault in the system that doesn’t require immediate evacuation, a supervisory signal indicates a condition that needs staff intervention to maintain safety, and code red is a building-specific label rather than the standard term for a general emergency signal. So the best fit for an emergency requiring immediate occupant action is alarm.