CGI Weather & Meteorology 1 — Questions and Answers
Question 1: What weather phenomenon is associated with a temperature inversion?
- Reduced visibility and fog near the surface (Correct answer)
- Severe turbulence at all altitudes
- Rapidly rising cumulus clouds
- Decreased atmospheric pressure
Correct answer: Reduced visibility and fog near the surface
A temperature inversion traps moisture and pollutants near the surface, often causing fog and reduced visibility.
Question 2: Which type of fog forms when warm, moist air moves over a cooler surface?
- Radiation fog
- Advection fog (Correct answer)
- Upslope fog
- Steam fog
Correct answer: Advection fog
Advection fog forms when warm, moist air moves horizontally over a cooler surface, cooling the air to its dew point.
Question 3: A SIGMET (WS) is issued for which conditions?
- Moderate icing below 10,000 ft MSL
- Severe or extreme turbulence, severe icing, or volcanic ash (Correct answer)
- Light turbulence along airways
- Widespread instrument meteorological conditions
Correct answer: Severe or extreme turbulence, severe icing, or volcanic ash
SIGMETs are issued for hazardous weather significant to all aircraft, including severe turbulence, severe icing, and volcanic ash.
Question 4: What is the standard lapse rate of temperature in the standard atmosphere?
- 2°C per 1,000 feet (Correct answer)
- 3°C per 1,000 feet
- 2°F per 1,000 feet
- 4°C per 1,000 feet
Correct answer: 2°C per 1,000 feet
The standard lapse rate is approximately 2°C (3.5°F) per 1,000 feet of altitude increase in the troposphere.
Question 5: Which cloud type is most associated with thunderstorm activity?
- Stratus
- Altocumulus
- Cumulonimbus (Correct answer)
- Cirrostratus
Correct answer: Cumulonimbus
Cumulonimbus clouds are the hallmark of thunderstorm activity, capable of reaching into the tropopause.
Question 6: What does a METAR surface wind of '27015KT' indicate?
- Wind from 270° at 15 knots (Correct answer)
- Wind toward 270° at 15 knots
- Wind from 270° at 15 mph
- Wind gusting to 27 knots at 15°
Correct answer: Wind from 270° at 15 knots
In a METAR, wind direction indicates where the wind is coming FROM, so 27015KT means wind from 270° (west) at 15 knots.
CGI Weather & Meteorology 1
What weather phenomenon is associated with a temperature inversion?