PLTW Aerospace Exam Quizzes
with Correct answers
Horizontal Stabilizer - ANSWER A 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 - ANSWER Aircraft speeds between Mach 10 and 25.
Hypersonic - ANSWER Aircraft speeds between Mach 5 and 10.
Keel Effect - ANSWER The flat surfaces located behind the center of gravity tend
to weathervane with the wind.
Lapse Rate - ANSWER The rate at which temperature decreases with an increase
in altitude.
Lateral Axis - ANSWER The horizontal line that passes through the center of gravity
of the aircraft, perpendicular to its flight path.
Leading Edge - ANSWER The part of the airfoil that meets the airflow first.
,Lift - ANSWER The force that created by the effect of airflow as it passes over and
under the wing.
Longitudinal Axis - ANSWER A straight line parallel to the length of the fuselage but that
runs through the aircraft's center of gravity.
Mach - ANSWER A decimal number representing the true airspeed relationship to
the local speed of sound.
Maneuverability - ANSWER Characteristic of the aircraft that permits you to maneuver
it easily and allows it to withstand the stress resulting from the maneuver.
Pitch - ANSWER Motion around the lateral axis caused by deflection in the
elevator controlled by moving the yoke forward and aft.
Powerplant - ANSWER Consists of both the engine and propeller in a small airplane.
Stability - ANSWER Aircraft stability is the characteristic of an airplane in flight that
causes it to return to a condition of equilibrium, or steady flight, after it is disturbed.
Stall - ANSWER Caused by the separation of airflow from the wing's upper
surface resulting in a rapid decrease in lift.
, Static Stability - ANSWER Forces and moments on the body caused by a
disturbance tend initially to return the body toward its equilibrium position.
Subsonic - ANSWER Aircraft speeds under Mach 1.
Supersonic - ANSWER Aircraft speeds between Mach 1 and 5.
Taper - ANSWER A reduction in the chord of a wing as measured from the root to
the tip of the wing.
Thrust - ANSWER Forward-acting force which opposes drag and propels the aircraft
through the air.
Trailing Edge - ANSWER The last point on an airfoil that interacts with the
airflow around the wing.
Reynolds Number - ANSWER The ratio of inertial forces to viscous forces.
Roll - ANSWER Rolling motion about the longitudinal axis caused by ailerons
deflecting in opposite directions and controlled by twisting the yoke.
with Correct answers
Horizontal Stabilizer - ANSWER A 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 - ANSWER Aircraft speeds between Mach 10 and 25.
Hypersonic - ANSWER Aircraft speeds between Mach 5 and 10.
Keel Effect - ANSWER The flat surfaces located behind the center of gravity tend
to weathervane with the wind.
Lapse Rate - ANSWER The rate at which temperature decreases with an increase
in altitude.
Lateral Axis - ANSWER The horizontal line that passes through the center of gravity
of the aircraft, perpendicular to its flight path.
Leading Edge - ANSWER The part of the airfoil that meets the airflow first.
,Lift - ANSWER The force that created by the effect of airflow as it passes over and
under the wing.
Longitudinal Axis - ANSWER A straight line parallel to the length of the fuselage but that
runs through the aircraft's center of gravity.
Mach - ANSWER A decimal number representing the true airspeed relationship to
the local speed of sound.
Maneuverability - ANSWER Characteristic of the aircraft that permits you to maneuver
it easily and allows it to withstand the stress resulting from the maneuver.
Pitch - ANSWER Motion around the lateral axis caused by deflection in the
elevator controlled by moving the yoke forward and aft.
Powerplant - ANSWER Consists of both the engine and propeller in a small airplane.
Stability - ANSWER Aircraft stability is the characteristic of an airplane in flight that
causes it to return to a condition of equilibrium, or steady flight, after it is disturbed.
Stall - ANSWER Caused by the separation of airflow from the wing's upper
surface resulting in a rapid decrease in lift.
, Static Stability - ANSWER Forces and moments on the body caused by a
disturbance tend initially to return the body toward its equilibrium position.
Subsonic - ANSWER Aircraft speeds under Mach 1.
Supersonic - ANSWER Aircraft speeds between Mach 1 and 5.
Taper - ANSWER A reduction in the chord of a wing as measured from the root to
the tip of the wing.
Thrust - ANSWER Forward-acting force which opposes drag and propels the aircraft
through the air.
Trailing Edge - ANSWER The last point on an airfoil that interacts with the
airflow around the wing.
Reynolds Number - ANSWER The ratio of inertial forces to viscous forces.
Roll - ANSWER Rolling motion about the longitudinal axis caused by ailerons
deflecting in opposite directions and controlled by twisting the yoke.
