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NIFE Weather Exam Practice Questions and Answers
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NIFE Weather Exam Practice Questions and Answers What is the composition of dry air? - ANSWER-78% nitrogen 21% oxygen 1% mixture of 10 other gases How much of the atmosphere, by volume, is composed of water? - ANSWER-0 to 5% What are condensation nuclei? - ANSWER--Nongaseous substances such a...

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  • November 4, 2024
  • 42
  • 2024/2025
  • Exam (elaborations)
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Copyright © KAYLIN 2024/2025 ACADEMIC YEAR. ALL RIGHTS RESERVED FIRST PUBLISH NOVEMBER, 2024




NIFE Weather Exam Practice Questions

and Answers


What is the composition of dry air? - ANSWER✔✔-78% nitrogen


21% oxygen


1% mixture of 10 other gases


How much of the atmosphere, by volume, is composed of water? - ANSWER✔✔-0 to 5%


What are condensation nuclei? - ANSWER✔✔--Nongaseous substances such as dust and salt particles,

pollen, etc




-Water molecules condense on these particles and form clouds


What layer of the atmosphere is adjacent to the Earth's surface? - ANSWER✔✔-Troposphere


List some characteristics of the troposphere. - ANSWER✔✔--Adjacent to Earth's surface


-Average height of 36,000'MSL above the US


-Becomes less dense with altitude


Copyright © Stuvia International BV 2010-2024 Page 1/42

, Copyright © KAYLIN 2024/2025 ACADEMIC YEAR. ALL RIGHTS RESERVED FIRST PUBLISH NOVEMBER, 2024




-Temperature decreases with increasing altitude


-Nearly all weather occurs here


-Wind velocity increases with altitude


What is the tropopause and where is it found? - ANSWER✔✔--Transition zone between the troposphere

and


stratosphere


-Temperature is constant with altitude


-Jet stream occurs right below (strongest winds)


Define Atmospheric Pressure (Barometric Pressure) - ANSWER✔✔--Pressure exerted on a surface by the

atmosphere due to the weight of the column of air directly above that surface


-Pressure always decreases with altitude (decreases more rapidly at lower altitudes because of

decreasing density)


What are the two units of measurement for atmospheric pressure? - ANSWER✔✔--in-Hg: measure of

the height of a column of mercury that can be supported by atmospheric pressure




-Millibar: direct representation of pressure (force/unit area)




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-Normal sea level pressures range from 28-31 in-Hg (960-1060mb)


Surface analysis charts use _______ as the reference pressure level for isobars. - ANSWER✔✔--MSL

barometric pressure (to provide a common reference)




-Allows meteorologists to track weather systems as they move across the country


What type of vertical atmospheric circulation is associated with a high-pressure system? - ANSWER✔✔-

Air will descend (downward force exerted by high pressure) and diverge, which produces wind


What type of vertical atmospheric circulation is associated with a low-pressure system? - ANSWER✔✔-

Air will ascend (insufficient pressure to keep air at the surface) and try to converge at the center of the

low-pressure, which also produces wind


What effect does the Coriolis Force have on wind as it moves horizontally into/out of high/low pressure

systems? - ANSWER✔✔--Wind will circulate as it moves out of a High-pressure system and into a Low-

pressure system


-Clockwise out of a high-pressure system (in the northern hemisphere)


-Counterclockwise into a low-pressure system (in the northern hemisphere)


What does the spacing of isobars indicate? - ANSWER✔✔--Rate of pressure change over a horizontal

distance


-Closer the spacing, the greater the change
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-Pressure Gradient Force


What is the pressure gradient defined as? - ANSWER✔✔--The rate of pressure change in a direction

perpendicular to the isobars


What is the initiating force of all winds? - ANSWER✔✔-Pressure Gradient Force


When isobars are close together, the Pressure Gradient Force is ______, and when isobars are far apart,

the Pressure Gradient Force is _______________. - ANSWER✔✔-greater/steeper




more shallow/weaker


What are the conditions of a standard day? - ANSWER✔✔--29.92 in-Hg (1013.2mb)


-15 deg C (59F)


-Standard day conditions at sea level


What is the standard lapse rate for pressure and temperature? - ANSWER✔✔--A 1,000' increase in

altitude will cause.....


Pressure to decrease by 1.0 in-Hg (34mb)


Temperature to decrease by 2 deg C (3.57F)




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