Questões ATP_pag308

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1046. What feature is associated with a temperature inversion?
 A. A stable layer of air.
 B. An unstable layer of air.
 C. Air mass thunderstorms.
A temperature inversion is defined as an increase in temperature with increasing
altitude, or a negative temperature lapse rate. Stable air masses have a low or
negative lapse rate.
Answer (B) is incorrect because instability occurs when the temperature decreases
(not increases as in a temperature inversion) with an increase in altitude, and the
rising air continues to rise. Answer (C) is incorrect because air mass thunderstorms
result from instability. They do not occur when there is a temperature inversion.
1047. What is the minimum glycol content of Type 1 deicing/anti-icing fluid?
 A. 30 percent.
 B. 50 percent.
 C. 80 percent.
SAE and ISO Type 1 fluids in the concentrated form contain a minimum of 80 percent
glycols and are considered 'unthickened' because of their relatively low viscosity.
1048. The pilot in command of an airplane en route determines that icing conditions can be
expected that might adversely affect safety of the flight. Which action is appropriate?
 A.
The pilot in command may continue to the original destination airport, after climbing to
a higher altitude.
 B. The pilot in command shall not continue flight into the icing conditions.
 C.
The flight may continue to the original destination airport, provided all anti-icing and
deicing equipment is operational and is used.
No person may dispatch or release an aircraft, continue to operate an aircraft en
route, or land an aircraft when, in the opinion of the pilot-in-command or aircraft
dispatcher, icing conditions are expected or met that might adversely affect the safety
of flight.
1049. Which weather condition is an example of a nonfrontal instability band?
 A. Squall line.
 B. Advective fog.
 C. Frontogenesis.
An instability line is a narrow, nonfrontal line or band of convective activity. If the
activity is fully developed thunderstorms, the line is a squall line.
Answer (B) is incorrect because advective fog occurs when warm moist air moves
over a cool surface. It forms in stable air. Answer (C) is incorrect because
frontogenesis is the generation of a frontal zone.