Question

In flight, when should the cowl anti-ice system be turned on based on the total air temperature (TAT)?

1) When the TAT is below a certain threshold
2) When the TAT is above a certain threshold
3) When the TAT is within a specific range
4) When the TAT is irrelevant for the cowl anti-ice system

Answer 1

The cowl anti-ice system should be activated when the TAT is below a certain threshold. Proper operation of this system is essential for preventing ice build-up and ensuring flight safety.

Step-by-step explanation:

In flight, the cowl anti-ice system should typically be turned on when the total air temperature (TAT) is below a certain threshold. The exact temperature at which the anti-ice system should be activated varies by aircraft, but it is generally when there is a potential for icing conditions.

In the scenario provided, comparing temperatures of 20°C and 10°C, it is important to understand that the energy required to maintain a specific interior temperature, such as 25°C, will increase as the outside air temperature drops. Therefore, the cowl anti-ice system plays a crucial role in preventing ice formation on the aircraft's surface, which can negatively affect its performance and safety.