Which color on the annunciator would illuminate to display a warning on the Digital Control System?

Which color on the annunciator would illuminate to display a warning on the Digital Control System?

• A. Red
• B. Green
• C. Yellow
• D. Blue

Answer: (C)

Annunciator lights are color-coded to show how urgently a condition needs attention. A warning is something that should be checked but isn’t an immediate failure, so it uses a yellow light. Red is for alarms or faults that require immediate action, green indicates normal operation, and blue is often used for informational or non-critical status. So when the Digital Control System shows a warning, the illuminated color would be yellow, signaling you to investigate the condition and take appropriate corrective steps.

Annunciator lights are color-coded to show how urgently a condition needs attention. A warning is something that should be checked but isn’t an immediate failure, so it uses a yellow light. Red is for alarms or faults that require immediate action, green indicates normal operation, and blue is often used for informational or non-critical status. So when the Digital Control System shows a warning, the illuminated color would be yellow, signaling you to investigate the condition and take appropriate corrective steps.