FAI Weather Practice Test Prep, Practice Questions & Study Guide

The statement about the temperature at the point where moisture strikes the aircraft being crucial for structural ice formation is accurate. Structural icing occurs when supercooled water droplets, which remain liquid even at temperatures below freezing, come in contact with a surface that is at or below 0 degrees Celsius. In such conditions, ice begins to accumulate on the aircraft surfaces, which can significantly affect its aerodynamic performance, weight, and safety.

This understanding underscores why maintaining awareness of temperature conditions is vital for flight operations. In contrast, the other statements do not accurately reflect the complexities of icing conditions. For example, ice can form even at slightly above freezing temperatures under specific atmospheric conditions, and it can occur at various altitudes, not exclusively high ones. Furthermore, while aircraft are built to handle certain levels of icing, they are not impervious, and excessive ice buildup can compromise safety, making the notion that all aircraft can withstand icing without issues misleading.