Questões ATP_pag310

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The Low-Level Wind Shear Alert System (LLWAS) is a computerized system which
detects the presence of a possible hazardous low-level wind shear by continuously
comparing the winds measured by sensors installed around the periphery on an
airport with the wind measured at the center field location. If the difference between
the center field wind sensor and peripheral sensor becomes excessive, a
thunderstorm or thunderstorm gust front wind shear is probable. When this condition
exists, the tower controller will provide arrival and departure aircraft with an advisory
of the situation which includes the center field wind plus the remote location and wind.
The broadcast quoted in the question is an example of this type of advisory.
Answer (A) is incorrect because a downburst is a vertical movement of air which is
not measured by the LLWAS until it has horizontal movement. Also the wind direction
is toward the center of the airport, not away from it. Answer (B) is incorrect because
wake turbulence does not produce wind. It is generated by an aircraft that is
producing lift, which could be on either side of the active runway.
1053. Isobars on a surface weather chart represent lines of equal pressure
 A. at the surface.
 B. reduced to sea level.
 C. at a given atmospheric pressure altitude.
Sea level pressures are plotted on a surface weather chart and lines are drawn
connecting lines of equal pressure. These lines of equal pressure are called isobars.
Answer (A) is incorrect because the isobars are depicted at the sea level pressure
pattern at 4 MB intervals, not just at the surface. Answer (C) is incorrect because the
isobars are reduced to sea level pressure, not any given atmospheric pressure
altitude.
1054. When you hear a SIGMET on an ATC frequency forecasting severe icing conditions
on the route to your destination, you plan for
 A.
the installed transport category aircraft ice protection system protecting against all
types and levels of icing as designed, 24 hours after the valid time.
 B.
very little airframe icing because of an OAT of -10 degrees C or colder, the moisture is
already frozen and cannot adhere to aircraft surfaces.
 C.
the possibility of freezing rain and freezing drizzle that can accumulate on and beyond
the limits of any deicing/anti-icing equipment.
Severe icing means the rate of accumulation is such that deicing/anti-icing equipment
fails to reduce or control the hazard. Immediate diversion is necessary.
1055. (Refer to Figure 149.) What approximate wind direction, speed, and temperature
(relative to ISA) are expected for a flight over MKC at FL 260?
 A. 260° true; 43 knots; ISA +10°C.
 B. 260° true; 45 knots; ISA -10°C.
 C. 260° magnetic; 42 knots; ISA +9°C.