Type I fluids are always applied first for what purpose?

Type I fluids are always applied first for what purpose?

• A. De-icing
• B. Anti-icing
• C. Cleaning
• D. Lubrication

Answer: (A)

Type I fluids are designed to rapidly melt and wash away existing ice and snow from aircraft surfaces. Their low-viscosity, glycol-based composition lets them flow over wings and control surfaces, breaking the ice bond so it can be removed quickly. Because they are thin and don’t stay on the surface for long, they don’t provide lasting protection against more ice formation. That’s why they’re used first to de-ice, after which a thicker anti-icing fluid (Type II or IV) can be applied to form a protective film and delay re-icing during taxi and takeoff. They’re not used for cleaning purposes or lubrication.

Type I fluids are designed to rapidly melt and wash away existing ice and snow from aircraft surfaces. Their low-viscosity, glycol-based composition lets them flow over wings and control surfaces, breaking the ice bond so it can be removed quickly. Because they are thin and don’t stay on the surface for long, they don’t provide lasting protection against more ice formation. That’s why they’re used first to de-ice, after which a thicker anti-icing fluid (Type II or IV) can be applied to form a protective film and delay re-icing during taxi and takeoff. They’re not used for cleaning purposes or lubrication.