Questões ATP_pag147

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The indicated airspeed (or calibrated airspeed) at which an aircraft stalls can be
considered constant, but the true airspeed at which it stalls increases with altitude
because of the lower air density.
Answer (A) is incorrect because the question is specifically asking about the knots
calibrated airspeed (KCAS) and not true airspeed (TAS) or Mach. Answer (C) is
incorrect because the question is specifically asking about the knots calibrated
airspeed (KCAS) and not true airspeed (TAS) or Mach.
507. Under what condition should stalls never be practiced in a twin-engine airplane?
 A. With one engine inoperative.
 B. With climb power on.
 C. With full flaps and gear extended.
With full power applied to the operative engine, as the airspeed drops below V(MC),
the airplane tends to roll as well as yaw into the inoperative engine. This tendency
becomes greater as the airspeed is further reduced. Since this tendency must be
counteracted by aileron control, the yaw condition is aggravated by aileron roll (the
'down' aileron creates more drag than the 'up' aileron). If a stall occurs in this
condition, a violent roll into the dead engine may be experienced.
508. How does an increase in an aircraft's weight affect its climb performance?
 A.
The aircraft will climb at a lower angle of attack, which allows for a higher TAS and
higher rate of climb.
 B.
Both parasite and induced drag are increased, which will lower the reserve thrust
available to climb.
 C.
A higher aircraft weight requires that the aircraft is configured for climb earlier in the
departure which allows a greater climb gradient.
Climb performance is most critical at high weight, high altitude, or during a malfunction
of a powerplant. A change in aircraft weight affects both climb angle and climb rate
and will alter the drag and power required. Generally, an increase in weight will reduce
the maximum rate of climb, but the airplane must be operated at an increased speed
to achieve the reduced maximum rate of climb.
509. What effect does extending leading edge slats have on an airplane's wing?
 A. Increases the pitch up moment of an airfoil.
 B. Increases the camber and CL(MAX).
 C. Allows for earlier airflow separation.
The primary purpose of high-lift devices (flaps, slots, slats, etc.) is to increase the
CL(max) of the airplane and reduce the stall speed. The takeoff and landing speeds
are consequently reduced.
510. What true airspeed and angle of attack should be used to generate the same amount
of lift as altitude is increased?