Final answer:
There are three main types of icing: structural icing, induction icing, and instrument icing. Icing conditions are most likely to be expected when the temperature is near or below freezing and there is visible moisture.
Step-by-step explanation:
Icing conditions are a type of hazardous weather condition that can affect aviation. It refers to the formation of ice on an aircraft, particularly on the wings, tail, and engines. There are three main types of icing: structural icing, induction icing, and instrument icing. Structural icing occurs when ice forms on the external surfaces of the aircraft, Induction icing occurs when ice accumulates on the engine, and instrument icing occurs when ice forms on the aircraft's instruments.
Icing conditions are most likely to be expected in certain weather conditions. These conditions include when the temperature is near or below freezing and there is visible moisture in the form of clouds, rain, freezing rain, or snow. Icing conditions can also be expected in clouds with temperatures between 0°C and -20°C, known as the icing zone. Additionally, areas with high humidity and precipitation are more prone to icing.