The ground idle blast danger area extends back from the tail of an executive jet aeroplane for
Why this is the answer
Per the TC AIM-AIR jet-blast danger figures, the ground-idle blast danger area behind a small executive jet extends at least 200 ft — the shortest of the listed jet idle zones, reflecting its smaller engines. Still a real hazard to people and light aircraft behind it.
Reference
TC AIM-AIR – Jet and Propeller Blast Danger
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.