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Contrail: Quiz

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Question 1: Each ________ is a mass of spinning air and the air pressure at the centre of the vortex is very low.
Fluid dynamicsVorticityVortexLift (force)

Question 2: The main products of hydrocarbon fuel ________ are carbon dioxide and water vapour.
FireInternal combustion engineOxygenCombustion

Question 3: Crow Instability contrail over ________
San FranciscoOakland, CaliforniaLos AngelesSan Jose, California

Question 4: As a wing generates lift, it causes a ________ to form at each wingtip, and sometimes also at the tip of each wing flap.
Wingtip vorticesVorticityFluid dynamicsVortex

Question 5: The grounding of planes for three days in the United States after September 11, 2001 provided a rare opportunity for scientists to study the effects of contrails on ________.
Kyoto ProtocolGlobal warmingAlbedoRadiative forcing

Question 6: If the air is cold enough, this trail will comprise tiny ________ crystals.
WaterPrecipitation (meteorology)IceSnow

Question 7: Wingtip vortices can sometimes be seen behind the wing flaps of airliners during takeoff and landing, and during landing of the ________.
Space ShuttleAres IApollo programAres V

Question 8: Contrails (short for "condensation trails") or vapour trails are basically artificial clouds that are the visible trails of condensed water vapour made by the exhaust of ________ engines.
Wide-body aircraftDouble-deck aircraftBusiness jetAircraft

Question 9: The ________ which trail from the wingtips and wing flaps of aircraft are sometimes partly visible due to condensation in the cores of the vortices.
Wingtip deviceLeading edge extensionF/A-18 HornetWingtip vortices







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