At what temperature does the oil-fuel heat exchanger turn off?

The oil-fuel heat exchanger is designed to operate within specific temperature parameters to maintain the appropriate oil temperature for optimal engine performance. The correct answer indicates that the heat exchanger turns off at 32°C. This specific temperature is crucial as it helps to prevent overheating of the oil, ensuring that it does not exceed acceptable limits that could potentially lead to engine damage or performance issues.

Maintaining the oil at lower temperatures allows for effective lubrication and cooling, which is vital in aviation operations where engine reliability is paramount. By turning off the heat exchanger at this precise temperature, the system safeguards the engine's overall functionality and longevity. The other temperature options may not align with the operational limits established for effective engine management.