Study Guide Test.
ADF - CORRECT ANSWER Automatic Direction Finder. An aircraft radio navigation system which senses
and indicates the direction to an L/MF non-directional radio beacon (NDB) ground transmitter.
Aerospace Engineer - CORRECT ANSWER Develops new technologies for use in aviation, defense
systems, and space exploration, often specializing in areas such as structural design, guidance,
navigation and control, instrumentation and communication, and production methods.
AGL - CORRECT ANSWER Above Ground Level. Altitude expressed in feet measured above ground level.
AID - CORRECT ANSWER Accident Incident Database produced by the FAA.
Aileron - CORRECT ANSWER Small-hinged sections on the outboard portion of a wing that are used to
generate a rolling motion for an aircraft.
Aircraft - CORRECT ANSWER A device that is used or intended to be used for flight in the air.
Airfoil - CORRECT ANSWER Any surface, such as a wing, which provides aerodynamic force when it
interacts with a moving stream of air.
Analog - CORRECT ANSWER A way of representing some physical quantity, such as temperature or
velocity, by a proportional continuous voltage or current.
Anemometer - CORRECT ANSWER An instrument for measuring the force or velocity of wind; a wind
gauge.
Angle of Attack - CORRECT ANSWER The angle formed by the wing chord line and the relative wind.
, Apogee - CORRECT ANSWER The point in an orbit that is farthest from Earth.
Argument of Perigee - CORRECT ANSWER Abbreviated as ω. The orientation of the orbit within the
orbital plane.
Aspect Ratio - CORRECT ANSWER The relationship between the length and width of a wing.
Asteroids - CORRECT ANSWER Small bodies composed of rock and metal in orbit about the sun.
ATC - CORRECT ANSWER Air Traffic Control, A system is to prevent a collision between aircraft operating
in the system and to organize and expedite the flow of traffic, and to provide support for National
Security and Homeland Defense.
Avionics - CORRECT ANSWER Electronics that are used onboard for piloting an aircraft. Avionics systems
enable interaction with aircraft systems including navigation, communication, and flight control.
Axial Stress - CORRECT ANSWER A force with its resultant passing through the centroid of a particular
section and being perpendicular to the plane of the section. A force in a direction parallel to the long
axis of the structure.
Bearing - CORRECT ANSWER The horizontal direction to or from any point, usually measured clockwise
from true north, magnetic north, or some other reference point through 360 degrees.
Blind Spot - CORRECT ANSWER The small circular area in the retina where the optic nerve enters the eye
that is devoid of rods and cones and is insensitive to light.
Boundary Layer - CORRECT ANSWER A thin layer of air next to the surface of an airfoil which shows a
reduction in speed due to the air's viscosity.
Center of Gravity - CORRECT ANSWER The common reference point for the three axes of the aircraft.