Test Flashcards
Every physical process of Weather is accompanied by or is the result of
Heating exchange- unequal heating on the earth’s surface
What causes variations in altimeter settings between weather reporting points?
unequal heating on the earth’s surface
The development of thermals depends upon …?
solar heating
clouds, fog, or vapor will always form when
water vapor condenses
while operating around buildings, the remote PIC should be aware of the creation of wind gusts that…?
change rapidly in direction and speed, causing turbulance
Wind shear is..?
a sudden drastic change in wind speed or direction over a small area.
What type of wind shear is most hazardous
low level
What is a trough
an elongated area of low presuure
one of the most easily recognized discontinuities across a front is
a change in temperature
One weather phenomenon which will always occur when flying across a front is a change in the
wind direction
cold front
the leading edge of an advancing cold air mass
warm front
the leading edge of an advancing warm air mass
which type of weather phenomenon, that may concern a remote pilot, is common among cold fronts
thunderstorms and heavy rain
what weather provides the best flying conditions
cool, dry air
the zone between different temperature, humidity, and wind is called
a front
what is a temperature inversion
a condition in which warm air is situated above cool air
a stable air mass is likely to have which characteristic
poor surface visibility
what are the characteristics of a moist, unstable air mass
turbulence and showery precipitation
what are the characteristics of stable air
stratiform clouds, fog, continuous precipitation, smooth air, and fair to poor visibility in haze and smoke - poor visibility and steady precipitation
what measurement can be used to determine the stability of the atmosphere
actual lapse rate
what would decrease the stability of an air mass
warming from below
upon your preflight evaluation of weather, the forecasts you reference state that there is an unstable air mass approaching your location.
What would be some concerns of your impending operations
thunderstorms, turbulent conditions, cumulus clouds, showery precipitation, good visibility
you have received an outlook from 1800wxbreif.com. The briefing states that you can expect a low-level temperature inversion with high relative humidity. What weather conditions would you expect ?
smooth air, poor visibility, fog, haze, or low clouds
what minimum visibility is required for sUAS operations?
3 miles