WX 301 EXAM 1 QUESTIONS AND
ANSWERS 100% PASS
List three common units of atmospheric pressure - ✔✔inches of mercury (HG),
Millibars (MB), and hecto-pascals (hPa)
difference between station pressure and sea level pressure - ✔✔station pressure: the
presssure measured directly by a barometer. Minor corrections for temperature and
latitude
Sea level pressure: the station pressure corrected for altitude. Multiple ways to correct
for altitude
Explain the difference between altimeter setting and "actual" sea level pressure -
✔✔altimeter setting: FAA uses a constant "standard Atmosphere. Indepent of weather
and location
Sea Level pressure: NWS uses current and past 12 hr temperature combined with
climatology for site. Weather and location
Identify the altitude a pressure altimeter will read when the Kollsman window is set to
the "standard" mean sea-level pressure - ✔✔29.92
COPYRIGHT © 2025 BY BRITTIE DONALD, ALL RIGHTS RESERVED 1
, Identify the altitude a pressure altimeter will read when the Kollsman window is set to
the current altimeter setting. - ✔✔mean sea level
List the three most common errors in altimeter reading - ✔✔sea level pressure,
tempature (cold and hot), and strong vertical gust (mountain and thunderstorm)
Identify the only altimeter error that the altimeter setting corrects - ✔✔sea level
pressure
Describe the effects of both changes in surface pressure and changes in temperature on
altimeter readings. - ✔✔Temperature: during cold weather vertical seperation is
nesscary and make sure to have extra altitude.
Surface Pressure: when flying in high you are fine but flying in cold you need to adjust
altitude.
Describe the impact of non-standard temperatures on density altitude - ✔✔Low density
altitude increases performance--air is more dense and provides greater lift and thrust
High density altitude can be hazardous, especially if an aircraft is critically loaded.
Describe the effect of high density altitudes on aircraft performance - ✔✔Additional
engine power to compensate for low density air
Slower rates of climb
Longer take-off and landing rolls
RA - ✔✔RAIN
SN - ✔✔SNOW
COPYRIGHT © 2025 BY BRITTIE DONALD, ALL RIGHTS RESERVED 2
ANSWERS 100% PASS
List three common units of atmospheric pressure - ✔✔inches of mercury (HG),
Millibars (MB), and hecto-pascals (hPa)
difference between station pressure and sea level pressure - ✔✔station pressure: the
presssure measured directly by a barometer. Minor corrections for temperature and
latitude
Sea level pressure: the station pressure corrected for altitude. Multiple ways to correct
for altitude
Explain the difference between altimeter setting and "actual" sea level pressure -
✔✔altimeter setting: FAA uses a constant "standard Atmosphere. Indepent of weather
and location
Sea Level pressure: NWS uses current and past 12 hr temperature combined with
climatology for site. Weather and location
Identify the altitude a pressure altimeter will read when the Kollsman window is set to
the "standard" mean sea-level pressure - ✔✔29.92
COPYRIGHT © 2025 BY BRITTIE DONALD, ALL RIGHTS RESERVED 1
, Identify the altitude a pressure altimeter will read when the Kollsman window is set to
the current altimeter setting. - ✔✔mean sea level
List the three most common errors in altimeter reading - ✔✔sea level pressure,
tempature (cold and hot), and strong vertical gust (mountain and thunderstorm)
Identify the only altimeter error that the altimeter setting corrects - ✔✔sea level
pressure
Describe the effects of both changes in surface pressure and changes in temperature on
altimeter readings. - ✔✔Temperature: during cold weather vertical seperation is
nesscary and make sure to have extra altitude.
Surface Pressure: when flying in high you are fine but flying in cold you need to adjust
altitude.
Describe the impact of non-standard temperatures on density altitude - ✔✔Low density
altitude increases performance--air is more dense and provides greater lift and thrust
High density altitude can be hazardous, especially if an aircraft is critically loaded.
Describe the effect of high density altitudes on aircraft performance - ✔✔Additional
engine power to compensate for low density air
Slower rates of climb
Longer take-off and landing rolls
RA - ✔✔RAIN
SN - ✔✔SNOW
COPYRIGHT © 2025 BY BRITTIE DONALD, ALL RIGHTS RESERVED 2
