1. What flight planning information can a pilot derive from Constant Pressure Analysis Charts? a. Winds and temperatures aloft. b. Clear air turbulence and icing conditions. c. Frontal systems and obstructions to vision aloft. 2 What lifts advection fog into low stratus clouds? a. Nighttime cooling. b. Dryness of the underlying land mass. c. Surface winds of approximately 15 knots or stronger. 3. The conditions necessary for the formation of cumulonimbus clouds are a lifting action and: a. unstable, moist air. b. unstable, dry air. c. stable, moist air. 4. What is the approximate base of the cumulus clouds if the temperature at 2,000 feet MSL is 10C and the dew point is 1C? a. 3,000 feet MSL. b. 4,000 feet MSL. c. 6,000 feet MSL. 5 Which combination of weather-producing variables would likely result in cumuliform type clouds, good visibility, and showery rain? a. Unstable , moist air and orographic lifting. b. Unstable, moist air and no lifting mechanism. c. Stable, moist air and orographic lifting