In de-icing practices, how should fluid be applied to avoid leaving residuals?

Applying fluid evenly and completely to all affected surfaces is crucial in de-icing practices to ensure effective results. When the de-icing fluid is evenly spread, it can form a uniform layer that works efficiently to prevent ice formation. This method minimizes the chances of pockets of untreated areas, which can lead to residual ice or snow.

Moreover, complete coverage is essential to ensure that every part of the surface is addressed, as even small areas left untreated can compromise the safety and performance of the aircraft. When fluid is applied correctly, it reduces the possibility of leftover material, allowing for optimal performance of the de-icing substance during operation.

The other approaches would lead to ineffective de-icing. For instance, spraying in a light mist might not provide enough coverage or concentration of the fluid to thoroughly remove or prevent ice. Applying fluid unevenly can also create untreated areas, leading to potential ice accumulation. Limiting application to only the wings ignores other critical areas, like the tail and control surfaces, which are equally important in aircraft operation.