Home › Part 107 Practice Tests › Loading, Performance & Airport Operations Questions › Question 32
Density altitude becomes higher, and air becomes effectively thinner, under which conditions?
- A.Cold temperatures at low elevation
- B.High temperature and high elevation
- C.High humidity alone on a cold sea-level day
Correct answer
B. High temperature and high elevation
Why
Heat and elevation both reduce air density. Thin air gives propellers less to work with and reduces motor cooling and efficiency, so performance falls.
Source: FAA-G-8082-22 Ch. 8 · ACS knowledge area: Determining the Performance of an sUAS · From the Loading, Performance & Airport Operations practice bank (PER-032).