Anti-ice systems in aircraft are designed to do which of the following?

• A. Remove ice after it forms on the airframe.
• B. Prevent the accumulation of ice on an aircraft structure via a system designed for that purpose.
• C. Increase aircraft weight to improve stability in icing conditions.
• D. Reduce drag by heating the entire fuselage.

Answer: (B)

In icing conditions, anti-ice systems are designed to prevent ice from forming on critical surfaces by delivering heat to areas like the wing leading edges, tail surfaces, engine inlets, and sometimes propeller blades. This keeps the airflow smooth over the surfaces, preserving lift, stall characteristics, and controllability. Anti-ice is about stopping ice from accumulating, not removing ice once it has formed. The other ideas don’t fit: removing ice after it forms describes de-icing, increasing weight to improve stability isn’t a function of anti-ice systems and would be undesirable, and heating the entire fuselage to reduce drag isn’t how these systems operate and would generally be inefficient.