When possible, what interval is provided when launching a jet after a turboprop?

• A. 60 seconds
• B. 30 seconds
• C. 45 seconds
• D. 90 seconds

Answer: (A)

The test is about safe sequencing and spacing when launching aircraft of different types from the same runway, focusing on wake turbulence and prop wash. After a turboprop, giving about a one-minute interval before the next aircraft (a jet) begins its takeoff helps ensure the disturbances from the turboprop have largely dissipated. This pause reduces the chance of debris on the runway being ingested or disturbed by the next jet’s engines, and it gives the following aircraft a cleaner airflow to achieve proper lift-off and engine performance. While longer intervals can be used, 60 seconds is the practical balance that maintains safety without unduly delaying departures. Shorter intervals increase risk from lingering wake and prop wash, while much longer gaps reduce efficiency without providing proportional safety gains.