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WX 301 EXAM 1 2024/2025 WITH 100% ACCURATE SOLUTIONS
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WX 301 EXAM 1 2024/2025 WITH 100% ACCURATE SOLUTIONS
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WX 301 EXAM 1 2024/2025 WITH 100%ACCURATE SOLUTIONS
List two common units of atmospheric pressure - Precise Answer ✔✔- inches of mercury ("Hg) in
aviation
- millibars (mb) in meteorology.
Convert between in. of mercury (in. Hg) and millibars (mb) - Precise Answer ✔✔29.921" Hg = 1013.2 mb
Explain the difference between station pressure and sea-level pressure (SLP) - Precise Answer
✔✔Station Pressure: pressure measured by a barometer near the surface
Sea-Level Pressure: station pressure corrected for the elevation of that surface
*Near the surface, pressure decreases approximately: 1 mb per 10 m or 1 inch Hg per 1,000ft.
Describe what is meant by "Standard Atmosphere" - Precise Answer ✔✔SLP: 29.92"Hg/1013.2mb
Temp: 59F/15C
Explain the difference between altimeter setting and "actual" SLP - Precise Answer ✔✔Both correct the
station pressure
SLP is station pressure corrected for the elevation at that surface
Altimeter setting accounts for temperature
Compare how pressure changes with height in a colder layer than in a warmer layer. - Precise Answer
✔✔Pressure changes more rapidly with height in a cold atmosphere.
5 altitudes commonly used in general aviation - Precise Answer ✔✔1. True altitude: Your height above
mean sea level.
2. Absolute altitude: Your height above the ground.
3. Pressure altitude: Your height above the standard Mean SLP surface of 29.921″ Hg.
, 4. Density altitude: Pressure altitude corrected for non-standard temperatures.
5. Indicated altitude - The altitude displayed on your altimeter. Only the same as true altitude under
standard conditions (assuming a calibrated altimeter).
List the three most common errors in altimeter readings - Precise Answer ✔✔non-standard sea level
pressure
non-standard temperature
strong vertical wind gusts
Estimate the error between true altitude and indicated altitude when the Kollsman window (or BARO) is
incorrectly set - Precise Answer ✔✔1000ft / 1"Hg
EX: 30.50 vs 30.0 = 500ft difference
HIGH TO LOW LOOK OUT BELOW
Define pressure altitude - Precise Answer ✔✔Height of a pressure surface in the standard atmosphere
P.A always increases as pressure decreases.
Identify the only altimeter error that the altimeter setting corrects - Precise Answer ✔✔non-standard
temperature error
Describe the effects of both changes in surface pressure and changes in temperature on altimeter
readings. - Precise Answer ✔✔When temperatures are colder than standard, your true altitude is less
than your indicated altitude (altimeter)
Describe how surface PA changes with pressure rises or falls - Precise Answer ✔✔High pressure = less
dense air = worse aircraft takeoff/landing performance
Lower pressures = better takeoff/landing performance
Define Density Altitude (DA) - Precise Answer ✔✔PA corrected for non-standard temperature and
humidity
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