Commercial Pilot License (CPL) Practice Exam 2026 - Free Commercial Pilot License Practice Questions and Study Guide

The three main types of aircraft icing include structural icing, induction system icing, and instrument icing.

Structural icing occurs when ice forms on the exterior surfaces of the aircraft, particularly on the wings and control surfaces, due to the aircraft flying through supercooled water droplets in clouds or precipitation. This type of icing can significantly degrade the aerodynamic performance of the aircraft, leading to reduced lift and increased drag.

Induction system icing affects the engine's air intake, which can lead to performance issues. Ice can form in the induction system, restricting airflow to the engine, which may result in power loss or even engine failure if not managed correctly.

Instrument icing happens when ice builds up on the aircraft's sensors and instruments. This can lead to incorrect readings on vital instruments, such as airspeed and altitude indicators, creating dangerous situations for pilots if they rely on faulty information.

Thus, the selection representing these three significant forms of icing accurately covers the critical aspects of how icing can impact flight safety and aircraft operation.