METEOROLOGY - CAAP CPL

Every physical process of weather is accompanied by or is the result of.....

-a heat exchange

-the movement of air

-a pressure differential

-a heat exchange

Moisture is added to a parcel of air by.....

-Sublimation and condensation

-Evaporation and condensation

-Evaporation and sublimation

-Evaporation and sublimation

With regards to windflow patterns show on surface analysis charts; when the isobars are.....

Close together, the pressure gradient force is slight and wind velocities are weaker

-Not close together, the pressure gradient force is greater and wind velocities are stronger.

-Close together, the pressure gradient force is greater and wind velocities are stronger.

-Close together, the pressure gradient force is greater and wind velocities are stronger.

What causes wind?

-The earth's rotation

-Air mass modification

-Pressure differences

-Pressure differences

Which is true regarding cold front occlusion? The air ahead of the warm front....

-Is colder than the air behind the overtaking cold front.

-Is warmer than the air behind the overtaking cold front.

-Has the same temperature as the air behind the overtaking cold front.

-Is warmer than the air behind the overtaking cold front.

Which is true with respect to a high-or-low pressure system?

-A high-pressure area or ridge is an area of rising air.

-A high-pressure area or trough is an area descending air.

-A high-pressure area or ridge is an area of descending air.

-A high-pressure area or ridge is an area of descending air.

What prevents air from flowing directly from high-pressure are to low-pressure areas?

-Coriolis Force

-Surface friction

-Pressure gradient force

-Coriolis Force

The jet stream and associated clear air turbulence can sometimes be visually identified in flight by.....

-dust or haze at flight level

-long streaks of cirrus clouds

-a constant outside air temperature

-long streaks of cirrus clouds

Which feature is associated with the tropopause?

-Constant height above the Earth

-Abrupt change in temperature lapse rate.

-Absolute upper limit of cloud formation

-Abrupt change in temperature lapse rate.

What is the standard temperature at the 10,000 feet?

A. -5°C

B. -15°C

C. +5°C

A. -5°C

What are the standard temperature and pressure values for sea level?

-15°C and 29.92" Hg

-59°F and 1013.2" Hg

-15°C and 19.92" Mb

-15°C and 29.92" Hg

Which is true regarding actual air temperature and due point temperature spread? The temperature spread.....

-Decreases as the relative humidity decreases.

-Decreases as the relative humidity increases.

-Increases as the relative humidity increases

-Decreases as the relative humidity increases.

Which combination of weather-producing variables would likely result in cumuliform type clouds, good visibility, and showery rain?

-Stable, moist air and orographic lifting

-Unstable, moist air and orographic lifting

-Unstable, moist air and no lifting mechanism

-Unstable, moist air and orographic lifting

Which characteristics of a cold air mass moving over a warm surface?

-Cumiliform clouds, turbulence, and poor visibility.

-Cumiliform clouds, turbulence, and good visibility.

-Stratiform clouds, smooth air and poor visibility.

-Cumiliform clouds, turbulence, and good visibility.

Fog produced by frontal activity is a result of saturation due to.....

-Nocturnal cooling

-Adiabatic cooling

-Evaporation of precipitation

-Evaporation of precipitation

What are the characteristic of stable air?

-Good visibility, steady precipitation, stratus clouds

-Poor visibility, steady precipitation, stratus clouds

-Poor visibility, intermittent precipitation, cumulus clouds

-Poor visibility, steady precipitation, stratus clouds

Which would decrease the stability of an air mass?

-Warming from below

-Cooling from below

-Decrease in water vapor

-Warming from below

Which is a characteristic of stable air?

-Cumiliform clouds

-Excellent visibility

-Restricted visibility

-Restricted visibility

A moist, unstable air mass is characterized by.....

-Poor visibility and smooth air

-Cumiliform clouds and showery precipitation

-Stratiform clouds and continuous precipitation

-Cumiliform clouds and showery precipitation

From which measurement of the atmosphere can stability be determined?

-Atmospheric pressure

-The ambient lapse rate

-The dry adiabatic rate

-The ambient lapse rate

What visible signs indicate extreme turbulence in thunderstorms?

-Base of the clouds near the surface, heavy rain and hail.

-Low ceiling and visibility, hail and precipitation static.

-Cumulonimbus clouds, very frequent lightning and roll clouds

-Cumulonimbus clouds, very frequent lightning and roll clouds

What feature is normally associated with the cumulus stage of a thunderstorm?

-Roll cloud

-Continuous updraft

-Beginning of rain at the surface

-Continuous updraft

Which statement is true concerning squall lines?

-They form slowly, but move rapidly.

-They are associated with frontal system only

-They offer the most intense weather hazards to aircraft

-They offer the most intense weather hazards to aircraft

Select the true statement pertaining to the life's cycle of a thunderstorm.

-Updrafts continue to develop throughout the dissipating stage of a thunderstorm.

-The beginning of rain at the Earth's surface indicates the mature stage of the thunderstorm.

-The beginning of rain at the Earth's surface indicates the dissipating stage of the thunderstorm.

-The beginning of rain at the Earth's surface indicates the mature stage of the thunderstorm.

Which weather phenomenon signals the beginning of the mature stage of thunderstorm?

-The start of rain

-The appearance of an anvil top

-Growth rate of cloud is maximum

-The start of rain

The conditions necessary for the formation of stratiform clouds are a lifting action and:

-Unstable, dry air

-Stable, moist air

-Unstable, moist air

-Stable, moist air

During the life cycle of a thunderstorm, which stage is characterized predominately by downdrafts?

-Mature

-Developing

-Dissipating

-Dissipating

Ice pellets encountered during flight are normally evidence that:

-A warm front has passed

-A warm front is about to pass

-There are thunderstorms in the area

-A warm front is about to pass

Turbulence that is encountered above 15,000 feet AGL not associated with cumuliform cloudiness, including thunderstorms, should be reported as:

-Severe turbulence

-Clear air turbulence

-Convective turbulence

-Clear air turbulence

When flying low over hilly terrain, ridges, or mountain ranges, the greatest potential from turbulent air currents will usually be encountered on the:

-Leeward side when flying with a tailwind

-Leeward side when flying into the wind

-Windward side when flying into the wind

-Leeward side when flying into the wind

During an approach, the most important and most easily recognized means of being alerted to possible wind shear is monitoring the:

-Amount of trim required to relieve control pressures

-Heading changes necessary to remain on the runway centreline

-Power and vertical velocity required to remain on the proper glidepath

-Power and vertical velocity required to remain on the proper glidepath

Hazardous wind shear is commonly encountered

-Near warm or stationary frontal activity

-When the wind velocity is stronger than 35 knots

-In area of temperature inversion and near thunderstorms

-In area of temperature inversion and near thunderstorms

With respect to advection fog, which statement is true?

-It is slow to develop and dissipates quite rapidly

-It forms almost exclusively at night or near daybreak

-It can appear suddenly during day or night, and it is more persistent than radiation fog

-It can appear suddenly during day or night, and it is more persistent than radiation fog

When an air mass is stable, which of these conditions is most likely to exist?

-Numerous towering cumulus and cumulonimbus clouds

-Moderate to severe turbulence at the lower levels

-Smoke, dust, haze, etc., concentrated at the lower levels with resulting poor visibility

-Smoke, dust, haze, etc., concentrated at the lower levels with resulting poor visibility

The most severe weather conditions such as destructive winds, heavy hail, and tornadoes, are generally associated with:

-Slow-moving warm fronts which slope above the tropopause

-Squall lines

-Fast-moving occluded fronts

-Squall lines