WX 301 Exam 1 UPDATED Questions
and CORRECT Answers
List three common units of atmospheric pressure - CORRECT ANSWER✔✔- inches of
mercury (HG), Millibars (MB), and hecto-pascals (hPa)
difference between station pressure and sea level pressure - CORRECT ANSWER✔✔-
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 - CORRECT
ANSWER✔✔- 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 - CORRECT ANSWER✔✔- 29.92
Identify the altitude a pressure altimeter will read when the Kollsman window is set to the
current altimeter setting. - CORRECT ANSWER✔✔- mean sea level
List the three most common errors in altimeter reading - CORRECT ANSWER✔✔- sea
level pressure, tempature (cold and hot), and strong vertical gust (mountain and
thunderstorm)
Identify the only altimeter error that the altimeter setting corrects - CORRECT
ANSWER✔✔- sea level pressure
, Describe the effects of both changes in surface pressure and changes in temperature on
altimeter readings. - CORRECT ANSWER✔✔- 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 - CORRECT
ANSWER✔✔- 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 - CORRECT
ANSWER✔✔- Additional engine power to compensate for low density air
Slower rates of climb
Longer take-off and landing rolls
RA - CORRECT ANSWER✔✔- RAIN
SN - CORRECT ANSWER✔✔- SNOW
BR - CORRECT ANSWER✔✔- MIST
FG - CORRECT ANSWER✔✔- FOG
SHRA - CORRECT ANSWER✔✔- RAIN SHOWER
TSRA - CORRECT ANSWER✔✔- THUNDER STORM
CAVOK - CORRECT ANSWER✔✔- (Clouds and visibility OK) will replace the visibility,
weather, and clouds sections if: The prevailing visibility is 10 kilometers or more
and CORRECT Answers
List three common units of atmospheric pressure - CORRECT ANSWER✔✔- inches of
mercury (HG), Millibars (MB), and hecto-pascals (hPa)
difference between station pressure and sea level pressure - CORRECT ANSWER✔✔-
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 - CORRECT
ANSWER✔✔- 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 - CORRECT ANSWER✔✔- 29.92
Identify the altitude a pressure altimeter will read when the Kollsman window is set to the
current altimeter setting. - CORRECT ANSWER✔✔- mean sea level
List the three most common errors in altimeter reading - CORRECT ANSWER✔✔- sea
level pressure, tempature (cold and hot), and strong vertical gust (mountain and
thunderstorm)
Identify the only altimeter error that the altimeter setting corrects - CORRECT
ANSWER✔✔- sea level pressure
, Describe the effects of both changes in surface pressure and changes in temperature on
altimeter readings. - CORRECT ANSWER✔✔- 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 - CORRECT
ANSWER✔✔- 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 - CORRECT
ANSWER✔✔- Additional engine power to compensate for low density air
Slower rates of climb
Longer take-off and landing rolls
RA - CORRECT ANSWER✔✔- RAIN
SN - CORRECT ANSWER✔✔- SNOW
BR - CORRECT ANSWER✔✔- MIST
FG - CORRECT ANSWER✔✔- FOG
SHRA - CORRECT ANSWER✔✔- RAIN SHOWER
TSRA - CORRECT ANSWER✔✔- THUNDER STORM
CAVOK - CORRECT ANSWER✔✔- (Clouds and visibility OK) will replace the visibility,
weather, and clouds sections if: The prevailing visibility is 10 kilometers or more
