Boeing 747 Anti-Ice Systems Exam -Questions with Correct
Answers/ Verified/ Latest Update (2024/2025)
How many anti-ice systems does the B-737 have? (2 total) - ✔✔Bleed air and electrical
Name everything that is electrically anti-iced on the B-737? - ✔✔Pitot Tubes, Temp. Probes,
Alpha vane Anti-Ice system, Windows - Windshield - doors, Water and Toilet drain Anti-Ice
system
Can the B-373 be dispatched into known or forecast icing conditions? - ✔✔Yes, but only into
light or moderate icing if dispatcher and pilot agree is is safe, but never severe icing.
Name everything which is pneumatically (hot bleed air) anti-iced on the B-737? - ✔✔Engine
1, and 2 -engine cowlings, nose dome bullet, and inlet guide vanes- and the Wing Thermal
Anti-Icing system (WTAI).
Which engines provide hot bleed air to the wing anti-ice system on the B-737? - ✔✔Engines
1 and 2
When do icing conditions exist on the ground according to Boeing? - ✔✔When the
temperature is 50F and below and there is visible moisture.
When do icing conditions exist in-flight according to Boeing? - ✔✔When the temperature is
10C and below and there is visible moisture.
With engine anti-ice on for takeoff, is there a takeoff weight penalty with the B-737? -
✔✔Yes, performance decreases with engine anti-ice on.
Why are the antennas anti-iced on the B-737? - ✔✔To prevent ice from building up and
breaking off, this could fly back into the engines or damage the fuselage or any control
surfaces.
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