Which Category of small unmanned aircraft must have an airworthiness certificate issued by the FAA?
A. 4.
B. 3.
C. 2.
Answer: A. 4.
Category 4 aircraft need an FAA airworthiness certificate. Categories 2 and 3 instead rely on a manufacturer's declaration of compliance.
The FAA published this sample set in August 2021. Our answers were checked against the current regulations and against the testing-supplement figures in September 2026.