Question 575 - Aircraft General Knowledge - Airframe, Systems, Powerplant - ATPL - Airline Transport Pilot license

Will only form at OAT's below +10°C.
Will only form at outside air temperatures (OAT's) below the freezing point of water.
May form at OAT's higher than +10°C.
Will only form at OAT's below the freezing point of fuel.

Training tests and timed exam simulations ATPL - Airline Transport Pilot license