Atc Basics Lesson 10

Front 1

The phenomenon resulting from the passage of an aircraft through the air is __________.

Back 1

Wake Turbulence

Front 2

What are circular pattern of air created by the movement of an airfoil through the air when generating lift?

Back 2

Vortices

Front 3

What is the most predominant part of aircraft wake turbulence and a by product of wing lift.

Back 3

Vortices

Front 4

The strength of a vortex is governed by what three factors?

Back 4

Weight of the generating aircraft

Shape of the wing (wing configuration)

Speed of the generating aircraft

Front 5

The greatest vortex strength is generated when the aircraft is __________, __________ and __________.

Back 5

Heavy, Clean and Slow

Front 6

The __________ of the aircraft is by far the greatest factor that affects the intensity of wake turbulence.

Back 6

Weight

Front 7

The __________ the speed, the greater the chance for wake turbulence to form.

Back 7

slower

Front 8

A __________ configured wing allows for a strong vortex to be generated because without flaps the wing has a smaller area and wing load is therefore greater per square foot.

Back 8

clean

Front 9

__________ is generated by the creation of pressure differential over the wing surface.

Back 9

Lift

Note: Low pressure above

High Pressure Below

Front 10

When viewing aircraft from behind, vortex circulation off the wingtip is __________ off the right wing; __________ off the left wing.

Back 10

Counterclockwise / Clockwise

Front 11

Vortices from large aircraft will sink approximately 300 ft to 500 ft per minute and level off approximately __________ feet below the flight path.

Back 11

500 to 1,000 feet

Front 12

With no wind, vortices within 100 ft to 200 ft of the ground will move _____ to _____ knots laterally across the ground.

Back 12

2 to 3 knots

Front 13

For landing aircraft, crosswinds of 1 to 5 knots tend to __________ the lateral movement of one vortex while __________ the movement of the other.

Back 13

decrease or stall / increase

Front 14

__________ can move vortices into the landing zones of aircraft that were originally trying to avoid the wake.

Back 14

Tailwinds

Front 15

__________ is the mechanical force a wake vortex has on an aircraft. With no counter roll (roll Control) the aircraft would spin completely, spinning on its longitudinal axis until the vortex sufficiently weakened.

Back 15

Induced Roll

Front 16

Hazardous conditions occur when the induced roll exceeds the level of __________.

Back 16

Roll Control

Front 17

The ability of an aircraft to counteract the effects of the roll (Counter Control) is based on __________ and __________.

Back 17

The wingspan of the aircraft

The counter control capability of the aircraft

Front 18

A helicopter will generate a downwash from its main rotors in a __________ or a __________.

Back 18

slow hover taxi or stationary hover

Front 19

A hovering helicopter creates a downwash from its main rotors that can travel up to how far?

Back 19

Three times the diameter of the rotor

Front 20

Pilots should avoid operating within __________ of any helicopter in a slow hover taxi or stationary hover.

Back 20

Three rotor diameters

Front 21

What must a helicopter be doing in order to generate wing tip vortices?

Back 21

Must be in forward flight

Front 22

Why is the controller not responsible for anticipating the existence or effect of wake turbulence.

Back 22

Because wake turbulence is unpredictable

Front 23

Wake turbulence has the greatest impact on ATC in the areas of __________ and __________.

Back 23

increased separation

traffic management delays