Free GPC Meteorology & Weather Assessment Questions and Answers — Questions and Answers
Question 1: What is the primary cause of wind?
- Rotation of the Earth.
- Differences in atmospheric pressure. (Correct answer)
- Ocean currents.
- Magnetic fields.
Correct answer: Differences in atmospheric pressure.
Wind is caused by differences in atmospheric pressure due to uneven heating of the Earth's surface.
Question 2: Which cloud type is most likely to produce thunderstorms?
- Stratus.
- Cirrus.
- Cumulonimbus. (Correct answer)
- Altostratus.
Correct answer: Cumulonimbus.
Cumulonimbus clouds are large, vertically developed clouds associated with thunderstorms and severe weather.
Question 3: What is the term for the boundary between two different air masses?
- Jet stream.
- Front. (Correct answer)
- Thermal inversion.
- Dew point.
Correct answer: Front.
A front is the transition zone between two air masses with different temperature and humidity characteristics.
Question 4: What weather phenomenon is most hazardous to glider pilots due to sudden downdrafts?
- Fog.
- Microburst. (Correct answer)
- High cirrus clouds.
- Light rain.
Correct answer: Microburst.
Microbursts are intense, localized downdrafts that can cause rapid altitude loss and are extremely dangerous for gliders.
Question 5: What does a rising barometric pressure typically indicate?
- Approaching storm.
- Stable or improving weather. (Correct answer)
- Increased turbulence.
- Heavy precipitation.
Correct answer: Stable or improving weather.
Rising pressure usually means improving weather conditions, while falling pressure suggests worsening weather.
Question 6: What is the most critical weather factor for thermal lift generation?
- Wind speed.
- Solar heating of the surface. (Correct answer)
- Humidity.
- Cloud cover.
Correct answer: Solar heating of the surface.
Solar heating of the ground creates thermals, which are essential for glider pilots to gain altitude.
Question 7: Which wind condition is most favorable for ridge soaring?
- Calm wind.
- Wind blowing parallel to the ridge.
- Wind blowing perpendicular to the ridge. (Correct answer)
- Gusty, shifting winds.
Correct answer: Wind blowing perpendicular to the ridge.
Ridge soaring requires consistent wind perpendicular to a ridge or mountain slope to create lift.
Question 8: What is the dew point?
- The highest temperature of the day.
- The temperature at which air becomes saturated. (Correct answer)
- The freezing point of water at altitude.
- The temperature inside a cloud.
Correct answer: The temperature at which air becomes saturated.
The dew point is the temperature at which air becomes saturated, leading to condensation (e.g., fog or dew).
Question 9: What weather condition is indicated by lenticular clouds?
- Calm, clear skies.
- Strong mountain wave activity. (Correct answer)
- Approaching warm front.
- Low humidity.
Correct answer: Strong mountain wave activity.
Lenticular clouds form in mountainous regions and indicate strong, turbulent winds aloft.
Free GPC Meteorology & Weather Assessment Questions and Answers
What is the primary cause of wind?