NIFE WEATHER EXAM QUESTIONS
AND ANSWERS 100% PASS
describe the characteristics of the troposphere - ✔✔average 55000ft over the equator to
28000ft over the poles, and average 36000ft MSL over the US. temperature decreases
and winds increase with increasing altitude, and nearly all weather occurs within it
define atmospheric pressure - ✔✔force per unit area exerted on a surface by the
atmosphere due to the weight of a column of air
state the standard units of pressure measurement - ✔✔inches of mercury and millibars
explain the term pressure gradient - ✔✔the rate of pressure change perpendicular to
isobars
define a lapse rate - ✔✔the rate of temperature decrease with increasing altitude
state the average temperature lapse rate in degrees Celsius - ✔✔2C/1000ft
define the standard atmosphere - ✔✔pressure is 29.92"Hg (1013.2mb) and temp is 15C
(59F) and decreases 1"Hg (34mb) and 2C (3.5F) per 1000ft increase
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, differentiate between sea level pressure and station pressure - ✔✔station pressure is
atmospheric pressure measured at an airfield or weather station. all stations report sea
level pressure
define indicated altitude - ✔✔altitude read directly from the altimeter
describe the effects of pressure changes on aircraft altimeters - ✔✔high pressure to low
pressure results in lower MSL than indicated. low to high pressure results in higher
MSL than indicated. (hi-lo look out below, lo-hi plenty of sky) (SETAI)
describe the effects of temperature deviations from the standard lapse rate on aircraft
altimeters - ✔✔11C change results in 4% error. cold = lower than indicated, hot = higher
than indicated
define the term air mass - ✔✔a large body of air that has uniform temperature and
moisture conditions throughout a given altitude
define saturation in a classroom - ✔✔when air contains the max amount of water vapor
at a given temperature
define dew point temperature - ✔✔the temperature at which saturation occurs
explain why atmospheric circulation occurs - ✔✔descending air creates high pressure
and ascending air creates low pressure. air circulates as it flows from high to low
pressure creating wind, and rises at the equator
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AND ANSWERS 100% PASS
describe the characteristics of the troposphere - ✔✔average 55000ft over the equator to
28000ft over the poles, and average 36000ft MSL over the US. temperature decreases
and winds increase with increasing altitude, and nearly all weather occurs within it
define atmospheric pressure - ✔✔force per unit area exerted on a surface by the
atmosphere due to the weight of a column of air
state the standard units of pressure measurement - ✔✔inches of mercury and millibars
explain the term pressure gradient - ✔✔the rate of pressure change perpendicular to
isobars
define a lapse rate - ✔✔the rate of temperature decrease with increasing altitude
state the average temperature lapse rate in degrees Celsius - ✔✔2C/1000ft
define the standard atmosphere - ✔✔pressure is 29.92"Hg (1013.2mb) and temp is 15C
(59F) and decreases 1"Hg (34mb) and 2C (3.5F) per 1000ft increase
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, differentiate between sea level pressure and station pressure - ✔✔station pressure is
atmospheric pressure measured at an airfield or weather station. all stations report sea
level pressure
define indicated altitude - ✔✔altitude read directly from the altimeter
describe the effects of pressure changes on aircraft altimeters - ✔✔high pressure to low
pressure results in lower MSL than indicated. low to high pressure results in higher
MSL than indicated. (hi-lo look out below, lo-hi plenty of sky) (SETAI)
describe the effects of temperature deviations from the standard lapse rate on aircraft
altimeters - ✔✔11C change results in 4% error. cold = lower than indicated, hot = higher
than indicated
define the term air mass - ✔✔a large body of air that has uniform temperature and
moisture conditions throughout a given altitude
define saturation in a classroom - ✔✔when air contains the max amount of water vapor
at a given temperature
define dew point temperature - ✔✔the temperature at which saturation occurs
explain why atmospheric circulation occurs - ✔✔descending air creates high pressure
and ascending air creates low pressure. air circulates as it flows from high to low
pressure creating wind, and rises at the equator
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