Test yourself: 5 hard theory questions, free Airspace, weather, regs and aerodynamics, FAA-style — instant score, every answer explained. No signup.
Free testeasyfuel-systems
Cross-feed valves in a fuel system allow:
A
Any engine to be fed from any tank
B
Fuel to flow between left and right tanks
C
Fuel to bypass the filter
D
APU fuel supply only
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See where you stand: 5 hard questions, instant score, every answer explained.