AVIATION METEOROLOGY 2026/2027 QUESTIONS AND
ANSWERS RATED A+
✔✔Which thunderstorms generally develop in the afternoon in summer over land in
moderate latitudes? - ✔✔airmass thunderstorms
✔✔If Kalamazoo reports a wind of 30012KT on the METAR, what wind velocity would
you expect to encounter at a height of 2000 feet above the ground? - ✔✔32020 KT
✔✔A microburst: - ✔✔is always associated with thunderstorms
✔✔At what time of the year are tornadoes most likely to occur in North America? -
✔✔spring, summer
✔✔The temperature at FL 80 is +6°C. What will the temperature be at FL 130 if the
ICAO standard lapse rate is applied? - ✔✔-4
✔✔Isobars, on the surface weather chart, connect positions with the same: -
✔✔atmospheric pressure
✔✔An air mass is called stable when the: - ✔✔environmental lapse rate is low (<1.5°C
per 1000 ft), with little vertical motion of air currents
✔✔An aircraft is flying over the sea at FL 120, with a true altitude of 12000 feet; local
altimeter setting is 29.92 in.Hg. What assumption, if any, can be made about the air
mass in which the aircraft is flying? - ✔✔its average temp is the same as the ISA
✔✔An aircraft is flying through the Rockies on a warm summer's day. The weather is
fine, and there is a high pressure system in the area. During the flight a mountain is
passed level with its summit. Which of the following is true concerning the altitude
reading given by the aneroid altimeter compared with the summit's elevation? - ✔✔it will
be lower than the elevation of the summit
✔✔An aircraft is flying in the southern hemisphere at low altitude (less than 2000 FT)
and going directly away from a centre of low pressure. What direction, relative to the
aircraft, does the wind come from? - ✔✔from left and slightly on the nose
✔✔If Kalamazoo reports a wind of 08010KT on the METAR, what wind velocity would
you expect to encounter at a height of 2000 feet above the ground? - ✔✔11020KT
✔✔An outside air temperature of -35°C is measured while cruising at FL 200. What is
the temperature deviation from the ISA at this level? - ✔✔10 degrees warmer than the
ISA
, ✔✔How does the height of the tropopause normally vary with latitude in the northern
hemisphere? - ✔✔it decreases from south to north
✔✔The tropopause is lower - ✔✔over the North Pole than over the equator
✔✔What is the approximate composition of dry air by volume in the troposphere? -
✔✔21% oxygen, 78% nitrogen, and 1% other gases
✔✔Convective activity over land in mid-latitudes (Michigan) is greatest in - ✔✔summer
in the afternoon
✔✔If in still air the temperature decreases at an average of 3.5°C per 1000 ft increase
in altitude. This temperature change is called: - ✔✔ELR
✔✔The greater the pressure gradient the: - ✔✔the closer the isobars and stronger the
wind
✔✔Which of the following statements is true concerning an aircraft that is flying at
FL180 in the northern hemisphere, where wind is geostrophic and the true altitude
remains constant? - ✔✔there is no cross wind
✔✔Which of the following clouds may extend into more than one level
(low/middle/high)? - ✔✔nimbostratus
✔✔In an unstable layer, the vertical extent of any cumuliform clouds depends on the: -
✔✔thickness of the unstable layer
✔✔Rising air cools because: - ✔✔it expands
✔✔Relative humidity: - ✔✔changes when water vapor is added, even though the
temperature remains constant
✔✔What are the characteristics of cumuliform clouds? - ✔✔large water droplets,
instability, turbulence, showers and mainly clear ice
✔✔What are the differences between radiation fog and advection fog? - ✔✔Radiation
fog forms due to surface cooling at night in a light wind. Advection fog forms when warm
humid air flows over a cold surface.
✔✔The early morning, following a clear calm night when the temperature has dropped
to the dewpoint, is likely to produce: - ✔✔radiation fog
ANSWERS RATED A+
✔✔Which thunderstorms generally develop in the afternoon in summer over land in
moderate latitudes? - ✔✔airmass thunderstorms
✔✔If Kalamazoo reports a wind of 30012KT on the METAR, what wind velocity would
you expect to encounter at a height of 2000 feet above the ground? - ✔✔32020 KT
✔✔A microburst: - ✔✔is always associated with thunderstorms
✔✔At what time of the year are tornadoes most likely to occur in North America? -
✔✔spring, summer
✔✔The temperature at FL 80 is +6°C. What will the temperature be at FL 130 if the
ICAO standard lapse rate is applied? - ✔✔-4
✔✔Isobars, on the surface weather chart, connect positions with the same: -
✔✔atmospheric pressure
✔✔An air mass is called stable when the: - ✔✔environmental lapse rate is low (<1.5°C
per 1000 ft), with little vertical motion of air currents
✔✔An aircraft is flying over the sea at FL 120, with a true altitude of 12000 feet; local
altimeter setting is 29.92 in.Hg. What assumption, if any, can be made about the air
mass in which the aircraft is flying? - ✔✔its average temp is the same as the ISA
✔✔An aircraft is flying through the Rockies on a warm summer's day. The weather is
fine, and there is a high pressure system in the area. During the flight a mountain is
passed level with its summit. Which of the following is true concerning the altitude
reading given by the aneroid altimeter compared with the summit's elevation? - ✔✔it will
be lower than the elevation of the summit
✔✔An aircraft is flying in the southern hemisphere at low altitude (less than 2000 FT)
and going directly away from a centre of low pressure. What direction, relative to the
aircraft, does the wind come from? - ✔✔from left and slightly on the nose
✔✔If Kalamazoo reports a wind of 08010KT on the METAR, what wind velocity would
you expect to encounter at a height of 2000 feet above the ground? - ✔✔11020KT
✔✔An outside air temperature of -35°C is measured while cruising at FL 200. What is
the temperature deviation from the ISA at this level? - ✔✔10 degrees warmer than the
ISA
, ✔✔How does the height of the tropopause normally vary with latitude in the northern
hemisphere? - ✔✔it decreases from south to north
✔✔The tropopause is lower - ✔✔over the North Pole than over the equator
✔✔What is the approximate composition of dry air by volume in the troposphere? -
✔✔21% oxygen, 78% nitrogen, and 1% other gases
✔✔Convective activity over land in mid-latitudes (Michigan) is greatest in - ✔✔summer
in the afternoon
✔✔If in still air the temperature decreases at an average of 3.5°C per 1000 ft increase
in altitude. This temperature change is called: - ✔✔ELR
✔✔The greater the pressure gradient the: - ✔✔the closer the isobars and stronger the
wind
✔✔Which of the following statements is true concerning an aircraft that is flying at
FL180 in the northern hemisphere, where wind is geostrophic and the true altitude
remains constant? - ✔✔there is no cross wind
✔✔Which of the following clouds may extend into more than one level
(low/middle/high)? - ✔✔nimbostratus
✔✔In an unstable layer, the vertical extent of any cumuliform clouds depends on the: -
✔✔thickness of the unstable layer
✔✔Rising air cools because: - ✔✔it expands
✔✔Relative humidity: - ✔✔changes when water vapor is added, even though the
temperature remains constant
✔✔What are the characteristics of cumuliform clouds? - ✔✔large water droplets,
instability, turbulence, showers and mainly clear ice
✔✔What are the differences between radiation fog and advection fog? - ✔✔Radiation
fog forms due to surface cooling at night in a light wind. Advection fog forms when warm
humid air flows over a cold surface.
✔✔The early morning, following a clear calm night when the temperature has dropped
to the dewpoint, is likely to produce: - ✔✔radiation fog
