Icing Conditions

Visible moisture must be present

The OAT or TAT must be at or below 10 °C (correct)

The OAT or TAT must be above 10 °C

The OAT or TAT must be at or below 20 °C

Clouds and fog

Rain and snow

Sleet and ice crystals

All of the above (correct)

On the ground only

In flight only

After takeoff only

On the ground or after takeoff if the OAT is at or below 10 °C and visible moisture is present; in flight if the TAT is at or below 10 °C and visible moisture is present (correct)