Which option is NOT a listed case for automatic W4 signal?

• A. Primary Units Exceed One Bottle Of Air Prior To Signal 77
• B. Primary Units Exceeding 40 Minutes Of Strenuous Activity Prior To 77
• C. All Second Alarms Or Greater
• D. A Request From The Incident Commander

Answer: (D)

The thing being tested is which situations automatically trigger the W4 signal, a safety-driven alert that activates without needing a supervisor to push a button. Automatic W4 triggers are based on objective conditions that crews and units can be measured against.

Two of the listed triggers rely on measurable criteria: if primary units have used more than one bottle of air before signal 77, and if units have accumulated 40 minutes of strenuous activity before signal 77. A third trigger occurs when all second alarms or greater are dispatched, indicating a higher-scale incident where safety checks become automatic. These are designed to kick in based on hard data and incident status rather than decisions made by someone in charge.

A request from the Incident Commander, while important for operational planning, is not an automatic trigger for the W4 signal. It’s a leadership action, not a predefined safety threshold that would independently initiate the W4 alert. Therefore, that option is the one that is not a listed case for automatic W4 signal.