Test yourself: 5 hard theory questions, free Airspace, weather, regs and aerodynamics, FAA-style — instant score, every answer explained. No signup.
Free testeasycost-optimization
Cost Index (CI) in flight planning balances:
A
fuel cost against time-related costs
B
maintenance cost against insurance cost
C
payload against fuel
D
altitude against speed
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See where you stand: 5 hard questions, instant score, every answer explained.