Test prep › Private Pilot Airplane › Question 39

Private Pilot Airplane practice question 39

Which statement relates to Bernoulli's principle?

Show answer

Correct answer: C. Air traveling faster over the curved upper surface of an airfoil causes lower pressure on the top surface.

Bernoulli's principle says pressure falls as the speed of a moving fluid rises. Faster airflow over the curved upper surface lowers the pressure there, producing lift. Choice A is Newton's third law.

References

Pilot's Handbook of Aeronautical Knowledge (FAA-H-8083-25C), ch. 4, Principles of Flight · search it in our library

Practice 10 random questions Practice 20

← Question 38 All Private Pilot Airplane questions Question 40 →

Question 39 from the FAA document Private Pilot-Airplane (PAR) Sample Questions (U.S. Government work, public domain) · ACS/LSC code PA.I.F.K3. The FAA does not publish an answer key; the answer and explanation are ours, with references. Verify against the current regulations and handbooks.