Scenario 49: Why is 'frost' on an aircraft wing considered dangerous, even in small amounts?

Question: Scenario 49: Why is 'frost' on an aircraft wing considered dangerous, even in small amounts?

Answer options:

• It adds significant weight to the aircraft.
• It can block rudder movement. ✅ It disrupts smooth airflow over the wing, reducing lift and increasing drag.
• It interferes with radio communication.

Correct answer: It disrupts smooth airflow over the wing, reducing lift and increasing drag.

Explanation: Even a thin layer of frost significantly roughens the wing surface. This disrupts the smooth laminar flow of air, causing a reduction in lift and an increase in drag, making takeoff and climb performance severely degraded or impossible. The correct answer is "It disrupts smooth airflow over the wing, reducing lift and increasing drag.". This capacity-fill scenario 49 reinforces the same competency for the ppl-canada bank and follows the certified explanation standard.