PLTW Aerospace Exam Questions With 100% Correct Answers.

PLTW Aerospace Exam Questions With 100% Correct Answers. Aerospace Engineer - answerDevelops 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. Aircraft - answerA device that is used or intended to be used for flight in the air. ATC - answerAir 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. FAA - answerFederal Aviation Administration. The U.S. Federal Aviation Administration is an operating mode of the Department of Transportation responsible for the safety of civil aviation. NASA - answerNational Aeronautics and Space Administration. The United States government agency that is responsible for science and technology related to air and space. NACA - answerNational Advisory Committee for Aeronautics. From March 3, 1915 until October 1, 1958, the National Advisory Committee for Aeronautics (NACA) provided advice and carried out much of the cutting-edge research in aeronautics in the United States. Aileron - answerSmall-hinged sections on the outboard portion of a wing that are used to generate a rolling motion for an aircraft. Airfoil - answerAny surface, such as a wing, which provides aerodynamic force when it interacts with a moving stream of air. Angle of Attack - answerThe angle formed by the wing chord line and the relative wind. Aspect Ratio - answerThe relationship between the length and width of a wing. Boundary Layer - answerA 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 - answerThe common reference point for the three axes of the aircraft. Cockpit - answerThe space in the fuselage of a small airplane containing seats for the pilot, copilot, and sometimes passengers. Controllability - answerThe capability of an aircraft to respond to your flight inputs, especially with regard to attitude and flight path. Dihedral - answerThe mounting of wings so that the wingtips and higher than the wingroot. Drag - answerActs in the opposite direction of flight, opposes the forward-acting force of thrust, and limits the forward speed of the aircraft. Dynamic Stability - answerOut of its own accord, an aircraft eventually returns to and remains at its equilibrium position over a period of time. Elevator - answerA rear horizontal stabilizer that controls up and down or pitching motion of the aircraft nose. Empennage - answerThe tail assembly of an aircraft, including the horizontal and vertical stabilizers, elevators and rudder. Flaps - answerControl surfaces attached to the trailing edge of the wing extending outward from the fuselage to the midpoint of each wing. Flaps can increase the lifting efficiency of the wing and decrease stall speed. Fuselage - answerHouses the cabin, the cockpit and is a common attachment point for the other major components. Glider - answerAn aircraft that is designed to fly without an engine. Horizontal Stabilizer - answerA structure that creates up and down forces at the tail to keep the fuselage aligned in pitch with the relative wind. The structure itself is horizontal while the forces it creates are vertical. High hypersonic - answerAircraft speeds between Mach 10 and 25. Hypersonic - answerAircraft speeds between Mach 5 and 10. Keel Effect - answerThe flat surfaces located behind the center of gravity tend to weathervane with the wind. Lapse Rate - answerThe rate at which temperature decreases with an increase in altitude. Lateral Axis - answerThe horizontal line that passes through the center of gravity of the aircraft, perpendicular to its flight path. Leading Edge - answerThe part of the airfoil that meets the airflow first. Lift - answerThe force that created by the effect of airflow as it passes over and under the wing.