Questões ATP_pag148

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A. The same true airspeed and angle of attack.
 B. A higher true airspeed for any given angle of attack.
 C. A lower true airspeed and higher angle of attack.
If the density factor is decreased and the total lift must equal the total weight to remain
in flight, it follows that one of the other factors must be increased. The factors usually
increased are the airspeed or the angle of attack, because these can be controlled by
the pilot.
Answer (A) is incorrect because true airspeed must be increased (not remain the
same) as altitude increases. Answer (C) is incorrect because true airspeed must
increase (not decrease) for any given angle of attack.
511. Which is a purpose of wing-mounted vortex generators?
 A.
Delays the onset of drag divergence at high speeds and aids in maintaining aileron
effectiveness at high speeds.
 B. Increase the onset of drag divergence and aid in aileron effectiveness at low speeds.
 C.
Breaks the airflow over the wing so the stall will progress from the root out to the tip of
the wing.
The function of the vortex generators is to create a strong vortex which introduces
high velocity, high energy air next to the surface to reduce or delay the shock-induced
separation.
Answer (B) is incorrect because vortex generators are most effective at high speeds
and the increased drag that they produce is not their primary function. Answer (C) is
incorrect because a stall strip breaks the airflow over the wing so the stall will progress
from the root out to the tip of the wing.
512. Why must the angle of attack be increased during a turn to maintain altitude?
 A. Compensate for loss of vertical component of lift.
 B. Increase the horizontal component of lift equal to the vertical component.
 C. Compensate for increase in drag.
When an airplane is banked, its lift can be broken into two vectors, a vertical
component of lift and a horizontal component. If the airplane is to maintain altitude in
the turn, the vertical component of lift must be equal to the aircraft's weight. This
means that total lift must be increased. Lift can be increased either by increasing
airspeed or by increasing angle of attack. If the vertical component of lift is less than
the aircraft's weight, the airplane will descend.
Answer (B) is incorrect because angle of attack is increased in order to increase the
vertical component of lift to equal weight. Answer (C) is incorrect because additional
thrust (power) is used to compensate for increase in drag.
513. What procedure is recommended for an engine-out approach and landing?
 A.
The flightpath and procedures should be almost identical to a normal approach and
landing.