Which indicator signals a temperature alarm?

Which indicator signals a temperature alarm?

• A. Red solid
• B. Green blink
• C. Steady amber
• D. Flash blue

Answer: (D)

Alarm indicators use both color and motion to convey urgency. For a temperature alarm, the flashing blue light is used because the rapid flash grabs attention and clearly differentiates this alert from other statuses. A red solid signal usually denotes a critical fault or shutdown, green indicates normal operation, and a steady amber warns without actively alarming. The combination of a blue color with a flashing pattern communicates that the temperature has surpassed safe limits and immediate awareness and action are needed.

Alarm indicators use both color and motion to convey urgency. For a temperature alarm, the flashing blue light is used because the rapid flash grabs attention and clearly differentiates this alert from other statuses. A red solid signal usually denotes a critical fault or shutdown, green indicates normal operation, and a steady amber warns without actively alarming. The combination of a blue color with a flashing pattern communicates that the temperature has surpassed safe limits and immediate awareness and action are needed.