Weather Phenomena Quiz

Which statement is true for condensation?

• Latent heat is transformed into pure energy.

• Latent heat is released to the atmosphere.

• Precipitation forms.

• Latent heat is absorbed from the surrounding air by the water droplet.

A layer of stratus is most likely to be dispersed by:

• insolation resulting in the lifting of the condensation level.

• the release of latent heat due to precipitation.

• absorption of long waved solar radiation in the stratus layer.

• adiabatic cooling due to subsidence.

Fog and cloud formation takes place by:

• evaporation.

• condensation.

• none of the above.

• sublimation.

Stratus formed by turbulence will occur when:

• in the friction layer mixing occurs by turbulence and the condensation level is situated below the top of the turbulent layer.

• absolute instability exists at low level.

• the wind speed is less than 10 kts and the air is heated by the Earth's surface.

• the wind speed is greater than 10 kts and the condensation level is situated just above the turbulent layer.

What is a Foehn wind?

• It is a flow of warm air up a slope of a hill caused by surface heating.

• It is a warm and moist anabatic wind that usually carries precipitation.

• It is an adiabatically heated wind blowing down a mountain side. The temperature on the lee side is normally lower than on the windward side of the mountain at the same level.

• It is an adiabatically heated wind blowing down a mountain side. The temperature on the lee side is normally higher than on the windward side of the mountain at the same level.

Thunderstorms can occur on a warm front if the:

• warm air is moist and the environmental lapse rate exceeds the saturated adiabatic lapse rate.

• cold air is moist and the environmental lapse rate exceeds the saturated adiabatic lapse rate.

• warm air is moist and the environmental lapse rate is less than the saturated adiabatic lapse rate.

• cold air is moist and the environmental lapse rate is less than the dry adiabatic lapse rate.

The dry adiabatic lapse rate has a value of

• 2°C/1000FT

• 0.65°C/100m

• 1°C/100m

• 0.5°C/100m

The value of the saturated adiabatic lapse rate is closest to that of the dry adiabatic lapse rate in:

• freezing fog

• stratus

• cirrus

• cumulus

For both saturated and unsaturated air instability will occur when the

• environmental lapse rate is greater than saturated adiabatic lapse rate but less than dry adiabatic lapse rate

• environmental lapse rate is greater than both dry adiabatic lapse rate and saturated adiabatic lapse rate

• dry adiabatic lapse rate is less than saturated adiabatic lapse rate but greater than environmental lapse rate

• environmental lapse rate is less than both dry adiabatic lapse rate and saturated adiabatic lapse rate

In case of fronts, what cloud formation is most likely to occur at low levels when a warm air mass overrides a cold air mass?

• Altostratus.

• Nimbostratus.

• Cumulus.

• Cumulonimbus.