and Correct Answers
What is the major motivating force behind atmospheric circulation? ✅C. Uneven
heating of the earths surface
What processes result in moisture being added to unsaturated air? ✅A. Evaporation
and sublimation
What processes result in moisture being added to unsaturated air? ✅A. Fog and low
clouds
With the approach and passage of a frontal system in the United States, what pressure
and wind direction changes take place? ✅C. The pressure falls as the front
approaches and rises after its passage, while the wind direction shifts to the right after
frontal passage
What conditions are necessary for the formation of thunderstorms? ✅A. Unstable air, a
lifting force, and high moisture levels
Thunderstorms and squall lines are generally associated with what type of front? ✅B.
Fast-moving cold
Select the true statement regarding wind shear
A. Wind shear is a sudden, drastic shift in wind speed that occurs in a horizontal plane
below 1,000 feet AGL
B. A wind shear alert is usually issued if a reading from a LLWAS sensor differs from
the mean by 5 knots
C. A microburst— one of the most dangerous sources of wind shear— is a downdraft
associated with connective activity ✅C. A microburst— one of the most dangerous
sources of wind shear— is a downdraft associated with connective activity
The elevation at Denver (DEN) is 5,400 feet. According to the accompanying aviation
routine weather report (METAR), how far below the ceiling will you be if you are flying at
7,500 feet MSL over Denver?
METAR KDEN 081055Z 21010G27KT 4SM
RA BR SCT015 BKN030 20/16 A2989 ✅A. 900 feet
According to the accompanying terminal aerodrome forecast (TAF), what visibility and
ceiling are forecast by0500Z at KPHL?