Aircraft General Knowledgeeasy#354
Pitot heat is normally:
A
Only used in visible icing conditions
B
Left on for the entire flight from before takeoff
CorrectC
Activated only above FL180
D
Controlled by the anti-ice computer automatically only
Explanation
Pitot heat is typically selected ON before takeoff and left on for the entire flight to prevent ice blockage of the pitot probe.
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