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Free PSTAR practice Wake Turbulence

Which statement concerning wing tip vortices is false?

  1. AVortices normally settle below and behind the aircraft.
  2. BWith a light crosswind, one vortex can remain stationary over the ground for some time.
  3. CLateral movement of vortices, even in a no wind condition, may place a vortex core over a parallel runway.
  4. DVortices are caused directly by ‘jet wash’.Correct answer

Why this is the answer

Per TC AIM-AIR (Wake Turbulence / Vortex Characteristics), the false statement is that vortices are caused by jet wash. Vortices are produced by lift (the pressure difference at the wing tips), not by engine exhaust; the other three statements are correct.

Reference

TC AIM-AIR – Wake Turbulence / Vortex Characteristics / General

Question reproduced verbatim from Transport Canada’s PSTAR Study and Reference Guide (TP 11919E). The answer key is Transport Canada’s; the explanation is ours.

A study aid — not a substitute for the official guide, the CARs, or your instructor.

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