ATC Aviation Weather Questions and
Answers (Top Grade Assured) 2026
Update
Atmospheric pressure - Correct Answers ✅the force
exerted by the atm at a given point
standard surface temperature at sea level - Correct
Answers ✅15 degrees C/59 degrees F
standard surface pressure at sea level - Correct Answers
✅29.92 in. of Hg/ 1013.2 millibars (hectopascals)
weight of atmosphere at sea level - Correct Answers ✅14.7
lbs/sq.in.
Mercurial barometer - Correct Answers ✅glass
thermometer (in. of Hg)
Aneroid barometer - Correct Answers ✅1. expands and
contracts with changes in atm P
2. indicates P
3. less accurate
Altimeter setting indicator (ASI) - Correct Answers
✅Aneroid system used at airports to provide setting for
aircraft. The setting is the pressure value to which an
altimeter scale is set so it will indicate the altitude above MSL
,ATC Aviation Weather Questions and
Answers (Top Grade Assured) 2026
Update
of the a/c on the ground at the loc. for which the P value was
determined
Analog Altimeter (ASI) - Correct Answers ✅glass dial
aneroid version
Digital altimeter (DASI) - Correct Answers ✅LED digital
readout with keypad; most common altimeter
Above ground level (AGL) - Correct Answers ✅aircraft
height above physical ground
Mean seal level (MSL) - Correct Answers ✅aircraft height
above sea level
Station Pressure - Correct Answers ✅pressure measured at
the airport
Altitude - Correct Answers ✅Height measured in feet AGL
or MSL
True altitude - Correct Answers ✅True/exact altitude above
MSL
,ATC Aviation Weather Questions and
Answers (Top Grade Assured) 2026
Update
Indicated altitude - Correct Answers ✅alt above MSL
indicated on the altimeter. Aircraft fly here below 18,000 ft.
Altimeter setting - Correct Answers ✅the value to which
the scale of the pressure altimeter is set so the altimeter
indicates true altitude at field elevation
standard lapse rate - Correct Answers ✅2 degrees C/3.3
degrees F per thousand feet
Pressure altitude - Correct Answers ✅Altitude in the
standard atmosphere where the current pressure surrounding
the aircraft is found
(18,000 feet)
Standard altimeter setting at pressure altitude - Correct
Answers ✅29.92 inches
Density altitude - Correct Answers ✅Altitude in the
standard atm where density of the air surrounding the aircraft
is found.
High density altitude - Correct Answers ✅1. Density is
equivalent to a higher altitude in the atm on a hot day
2. Reduces aircraft performance
, ATC Aviation Weather Questions and
Answers (Top Grade Assured) 2026
Update
3. Reduces a/c rate of climb
Low density altitude - Correct Answers ✅1. Density
equivalent to a lower altitude in the atm of cooler day
2. increases a/c performance
3. Increases a/c rate of climb
Convective current - Correct Answers ✅1. two surfaces
heated unequally cause the uneven *heating* of the air
above (NOT uneven cooling)
2. Warm air expands and becomes lighter, cool air drawn to
ground which forces warm air to rise
Wind - Correct Answers ✅horizontal airflow in a convective
current
Advection - Correct Answers ✅1. Horizontal movement of
wind
2. Can transfer heat or atm properties from one area to
another
Circulation - Correct Answers ✅1. air flows from higher P to
lower P
2. convective current on a large scale
Answers (Top Grade Assured) 2026
Update
Atmospheric pressure - Correct Answers ✅the force
exerted by the atm at a given point
standard surface temperature at sea level - Correct
Answers ✅15 degrees C/59 degrees F
standard surface pressure at sea level - Correct Answers
✅29.92 in. of Hg/ 1013.2 millibars (hectopascals)
weight of atmosphere at sea level - Correct Answers ✅14.7
lbs/sq.in.
Mercurial barometer - Correct Answers ✅glass
thermometer (in. of Hg)
Aneroid barometer - Correct Answers ✅1. expands and
contracts with changes in atm P
2. indicates P
3. less accurate
Altimeter setting indicator (ASI) - Correct Answers
✅Aneroid system used at airports to provide setting for
aircraft. The setting is the pressure value to which an
altimeter scale is set so it will indicate the altitude above MSL
,ATC Aviation Weather Questions and
Answers (Top Grade Assured) 2026
Update
of the a/c on the ground at the loc. for which the P value was
determined
Analog Altimeter (ASI) - Correct Answers ✅glass dial
aneroid version
Digital altimeter (DASI) - Correct Answers ✅LED digital
readout with keypad; most common altimeter
Above ground level (AGL) - Correct Answers ✅aircraft
height above physical ground
Mean seal level (MSL) - Correct Answers ✅aircraft height
above sea level
Station Pressure - Correct Answers ✅pressure measured at
the airport
Altitude - Correct Answers ✅Height measured in feet AGL
or MSL
True altitude - Correct Answers ✅True/exact altitude above
MSL
,ATC Aviation Weather Questions and
Answers (Top Grade Assured) 2026
Update
Indicated altitude - Correct Answers ✅alt above MSL
indicated on the altimeter. Aircraft fly here below 18,000 ft.
Altimeter setting - Correct Answers ✅the value to which
the scale of the pressure altimeter is set so the altimeter
indicates true altitude at field elevation
standard lapse rate - Correct Answers ✅2 degrees C/3.3
degrees F per thousand feet
Pressure altitude - Correct Answers ✅Altitude in the
standard atmosphere where the current pressure surrounding
the aircraft is found
(18,000 feet)
Standard altimeter setting at pressure altitude - Correct
Answers ✅29.92 inches
Density altitude - Correct Answers ✅Altitude in the
standard atm where density of the air surrounding the aircraft
is found.
High density altitude - Correct Answers ✅1. Density is
equivalent to a higher altitude in the atm on a hot day
2. Reduces aircraft performance
, ATC Aviation Weather Questions and
Answers (Top Grade Assured) 2026
Update
3. Reduces a/c rate of climb
Low density altitude - Correct Answers ✅1. Density
equivalent to a lower altitude in the atm of cooler day
2. increases a/c performance
3. Increases a/c rate of climb
Convective current - Correct Answers ✅1. two surfaces
heated unequally cause the uneven *heating* of the air
above (NOT uneven cooling)
2. Warm air expands and becomes lighter, cool air drawn to
ground which forces warm air to rise
Wind - Correct Answers ✅horizontal airflow in a convective
current
Advection - Correct Answers ✅1. Horizontal movement of
wind
2. Can transfer heat or atm properties from one area to
another
Circulation - Correct Answers ✅1. air flows from higher P to
lower P
2. convective current on a large scale
