Welcome to your Private Pilot – Chapter 1 Full Name Email What determines the longitudinal stability of an airplane? The location of the CG with respect to the center of lift. The effectiveness of the horizontal stabilizer, rudder, and rudder trim tab. The relationship of thrust and lift to weight and drag. None What causes an airplane (except a T-tail) to pitch nosedown when power is reduced and controls are not adjusted? The CG shifts forward when thrust and drag are reduced. The downwash on the elevators from the propeller slipstream is reduced and elevator effectiveness is reduced. When thrust is reduced to less than weight, lift is also reduced and the wings can no longer support the weight. None The angle between the chord line of an airfoil and the relative wind is known as the angle of lift. attack. incidence. None When taking off or landing at an airport where heavy aircraft are operating, one should be particularly alert to the hazards of wingtip vortices because this turbulence tends to rise from a crossing runway into the takeoff or landing path. rise into the traffic pattern area surrounding the airport. sink into the flightpath of aircraft operating below the aircraft generating the turbulence. None Loading an airplane to the most aft CG will cause the airplane to be less stable at all speeds. less stable at slow speeds, but more stable at high speeds. less stable at high speeds, but more stable at low speeds. None Floating caused by the phenomenon of ground effect will be most realized during an approach to land when at less than the length of the wingspan above the surface. twice the length of the wingspan above the surface. a higher-than-normal angle of attack. None The four forces acting on an airplane in flight are lift, weight, thrust, and drag. lift, weight, gravity, and thrust. lift, gravity, power, and friction. None During a spin to the left, which wing(s) is/are stalled? Both wings are stalled. Neither wing is stalled. Only the left wing is stalled. None How does frost affect the lifting surfaces of an airplane on takeoff? Frost may prevent the airplane from becoming airborne at normal takeoff speed. Frost will change the camber of the wing, increasing lift during takeoff. Frost may cause the airplane to become airborne with a lower angle of attack at a lower indicated airspeed. None What is the purpose of the rudder on an airplane? To control yaw. To control overbanking tendency. To control roll. None Time's upTime is Up!