Which of the following is a type of alarm described in the system?

• A. Visual alarms
• B. Thermal alarms
• C. Magnetic alarms
• D. Acoustic alarms

Answer: (A)

Alarms in this system are described by how they alert the operator, and the description emphasizes visible indicators—lights, displays, or illuminated cues that signal a fault or status change. This makes visual alarms the best fit because they convey urgency through what you can see, which is the focus of the system’s description. Thermal alarms would indicate a temperature-triggered warning, magnetic alarms rely on sensor changes related to magnets or tampering, and acoustic alarms use sound to alert. Since the description centers on a visual warning method, visual alarms are the appropriate match.