Final answer:
Icing conditions are present when the Outside Air Temperature on the ground and for takeoff is 10°C or below in the presence of visible moisture or on wet or contaminated surfaces.
Step-by-step explanation:
Icing conditions exist when Outside Air Temperature (OAT) on the ground and for takeoff is 10°C or below, when operating on ramps, taxiways, or runways where there is visible moisture such as rain, snow, sleet, or ice particles, or when taking off from wet or contaminated runways. In aviation, understanding and recognizing icing conditions is crucial for aircraft performance and safety.
Pilots must take proactive measures to prevent ice from accumulating on the aircraft's surfaces, which can degrade the performance and controllability of the aircraft.