Aircraft Fueling and De-icing Operations Flashcards
7 cards from real AIRPORT EMPLOYEE practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 7 Aircraft Fueling and De-icing Operations flashcards as text
What is the primary difference between aircraft de-icing and anti-icing?
Answer: De-icing removes existing ice and snow; anti-icing prevents new accumulation
De-icing removes existing ice, snow, or frost from aircraft surfaces, while anti-icing involves applying fluid to prevent new ice or snow from accumulating before departure.
What color is Type I de-icing fluid typically?
Answer: Clear or light orange
Type I de-icing fluid is typically clear to light orange/straw-colored and is primarily used for de-icing (removing existing ice) due to its low viscosity and heated application.
What is 'holdover time' in aircraft de-icing operations?
Answer: The estimated time anti-icing fluid remains effective before new contamination accumulates
Holdover time is the estimated period during which anti-icing fluid prevents the accumulation of ice, snow, or frost on critical aircraft surfaces after application.
Which type of de-icing/anti-icing fluid provides the longest holdover time?
Answer: Type IV
Type IV fluid is a thickened anti-icing fluid designed to provide the longest holdover time due to its high viscosity, which allows it to remain on critical surfaces longer.
What does the 'clean aircraft concept' require before takeoff?
Answer: No frozen contaminants may be present on any critical aircraft surface
The clean aircraft concept mandates that no snow, ice, slush, or frost may adhere to any critical surface of an aircraft at the time of takeoff, as contamination severely degrades aerodynamic performance.
Which surfaces on an aircraft are considered 'critical surfaces' that must be free of ice before departure?
Answer: Wings, control surfaces, stabilizers, and engine inlets
Critical surfaces include wings, control surfaces (ailerons, elevators, rudder), horizontal and vertical stabilizers, and engine inlets—all areas directly affecting lift, control, and engine operation.
When both de-icing and anti-icing are required, what is the correct sequence of operations?
Answer: De-ice first to remove existing contamination, then apply anti-icing fluid
De-icing must be performed first to remove existing ice and contamination, followed immediately by anti-icing fluid application to prevent re-icing before the aircraft departs.