IRA Test Questions and Answers-
weather
what is an indication that downdrafts have developed and the thunderstorm cell has entered the
mature stage? - Answer-precipitation begins to fall from the cloud base
what are the requirements for the formation of a thunderstorm? - Answer-moisture, an unstable lapse
rate, and lifting action
if you fly into severe turbulence, which flight condition should you attempt to maintain? - Answer-level
flight attitude
which is true regarding the use of airborne weather-avoidance radar fro the recognition of certain
weather conditions? - Answer-the radar scope provides no assurance of avoiding instrument weather
conditions
under which condition does advection fog usually form? - Answer-moist air moving over colder ground
or water
fog is usually prevalent in industrial areas because of - Answer-an abundance of condensation nuclei
from combustion products
in which situation is advection fog most likely to form? - Answer-an air mass moving inland from the
coast in winter
, in what localities is advection fog most likely to occur? - Answer-coastal areas
what types of fog depend upon a wind in order to exist? - Answer-advection and up slope fog
what situation is most conducive to the formation of radiation fog? - Answer-warm moist air over low
flatland areas in clear calm nights
which conditions are favorable for the formation of radiation fog? - Answer-clear sky, little/no wind,
small temp/dew point spread, and over a land surface
a jet stream is defined as a wind of - Answer-50 knots or greater
which weather condition can be expected when moist air flows from a relatively warm surface to a
colder surface? - Answer-fog
the strength and location of the jet stream is normally - Answer-weaker and farther north in the
summer
HIWAS is a continuous broadcast over selected VORs of - Answer-sigmets, convective sigmets, airmets,
severe weather forecasts alerts, and center weather advisories
a ceiling is defined as the height of the - Answer-lowest layer of clouds or obscuring phenomena aloft
that is reported as broken or overcast
what sources reflect the most accurate information on icing conditions at the time of departure? -
Answer-pilot weather reports (PIREPs), airmets, and sigmets
weather
what is an indication that downdrafts have developed and the thunderstorm cell has entered the
mature stage? - Answer-precipitation begins to fall from the cloud base
what are the requirements for the formation of a thunderstorm? - Answer-moisture, an unstable lapse
rate, and lifting action
if you fly into severe turbulence, which flight condition should you attempt to maintain? - Answer-level
flight attitude
which is true regarding the use of airborne weather-avoidance radar fro the recognition of certain
weather conditions? - Answer-the radar scope provides no assurance of avoiding instrument weather
conditions
under which condition does advection fog usually form? - Answer-moist air moving over colder ground
or water
fog is usually prevalent in industrial areas because of - Answer-an abundance of condensation nuclei
from combustion products
in which situation is advection fog most likely to form? - Answer-an air mass moving inland from the
coast in winter
, in what localities is advection fog most likely to occur? - Answer-coastal areas
what types of fog depend upon a wind in order to exist? - Answer-advection and up slope fog
what situation is most conducive to the formation of radiation fog? - Answer-warm moist air over low
flatland areas in clear calm nights
which conditions are favorable for the formation of radiation fog? - Answer-clear sky, little/no wind,
small temp/dew point spread, and over a land surface
a jet stream is defined as a wind of - Answer-50 knots or greater
which weather condition can be expected when moist air flows from a relatively warm surface to a
colder surface? - Answer-fog
the strength and location of the jet stream is normally - Answer-weaker and farther north in the
summer
HIWAS is a continuous broadcast over selected VORs of - Answer-sigmets, convective sigmets, airmets,
severe weather forecasts alerts, and center weather advisories
a ceiling is defined as the height of the - Answer-lowest layer of clouds or obscuring phenomena aloft
that is reported as broken or overcast
what sources reflect the most accurate information on icing conditions at the time of departure? -
Answer-pilot weather reports (PIREPs), airmets, and sigmets
