Questões ATP_pag314

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Airborne weather radar detects only precipitation size raindrops and hail. Absence of
a radar return does indicate an area free of clouds or turbulence.
Answer (A) is incorrect because weather radar detects only precipitation drops, not
clouds. Answer (B) is incorrect because convective turbulence, which would not be
detected by radar, could be found under cumulus clouds. Radar does not detect
turbulence.
1067. Which action is recommended if jetstream turbulence is encountered with a direct
headwind or tailwind?
 A. Increase airspeed to get out of the area quickly.
 B. Change course to fly on the polar side of the jetstream.
 C. Change altitude or course to avoid a possible elongated turbulent area.
If jet stream turbulence is encountered with direct tailwinds or headwinds, a change of
flight level or course should be initiated since these turbulent areas are elongated with
the wind, and are shallow and narrow.
Answer (A) is incorrect because an increase in airspeed may overstress the airplane
in turbulent conditions. Normally, a reduction in airspeed is required for turbulent air
penetration. Answer (B) is incorrect because CAT is normally on the polar side of the
jet stream, so you would be flying into more turbulent weather.
1068. When high level moisture is available, cirrus clouds form on the
 A. polar side of the jet stream.
 B. equatorial side of the jet stream.
 C. acute angle side of the jet stream.
When high-level moisture is present, cirriform clouds form on the equatorial side of
the jet stream.
1069. What condition is indicated when ice pellets are encountered during flight?
 A. Thunderstorms at higher levels.
 B. Freezing rain at higher levels.
 C. Snow at higher levels.
Rain or drizzle is always formed in temperatures which are above freezing. Rain
falling through colder air may become supercooled, freezing on impact as freezing
rain. As it continues to fall in the freezing temperature, it will form into ice pellets.
Answer (A) is incorrect because ice pellets always indicate freezing rain, not
thunderstorms, at higher altitudes. Answer (C) is incorrect because freezing rain, not
snow, is indicated at higher altitude when ice pellets are encountered.
1070. Snow on top of deicing or anti-icing fluids
 A. need not be considered as adhering to the aircraft.