What is the preflight check for the Waste Temperature Sensor?

The preflight check for the Waste Temperature Sensor involves verifying that it is present and that the strip is WHITE/SILVER in color. This specific visual inspection is crucial because the color of the strip indicates the operational status of the sensor. A WHITE/SILVER strip means that the sensor is in normal operating condition and has not detected any overheating conditions, which is essential for safety.

While other options might seem relevant, they either do not apply to the specific requirements for the Waste Temperature Sensor or involve actions that are not part of the standard preflight check. For instance, testing the heating function or checking for leaks are actions typically associated with different components or systems rather than the Waste Temperature Sensor's preflight procedure. Thus, ensuring that the sensor is correctly identified and visually confirmed as operational is the key step.