In what situation would the DUCT TEMP alert be dismissed as a fault?

• A. When temperatures drop below 250°F
• B. When temperatures exceed 300°F
• C. When temperatures stabilize
• D. When the duct is replaced

Answer: (A)

The DUCT TEMP alert can be dismissed as a fault when the ambient conditions indicate that the duct temperatures have dropped below a critical threshold, specifically 250°F. This temperature indicates that the duct system is functioning within normal operational parameters. The system is designed to alert crews to potential overheating issues, as excessively high temperatures could lead to equipment damage or failure.

When temperatures fall below 250°F, it suggests that the potential issue has resolved itself, and the conditions are no longer hazardous. This level acts as a baseline for normal duct operation, allowing the crew to safely disregard the alert in such scenarios.

In contrast, options that involve temperatures exceeding 300°F or require the duct to be stabilized or replaced would not allow for dismissal of the fault due to the inherent risks associated with high temperatures and the need for continued monitoring or maintenance.