ADX WX: SECTION (1) ALL – Flashcards

What is a characteristic of the troposphere?

Which feature is associated with the tropopause?

The tropopause is generally found when the free air temperatures are

The tropopause varies in height from

What is the primary cause of all changes in the Earth's weather?

What characterizes a ground-based inversion?

What feature is associated with a temperature inversion?

When does minimum temperature normally occur during a 24-hour period?

Where is a common location for an inversion?

What condition produces the most frequent type of ground- or surface based temperature inversion?

Which term applies when the temperature of the air changes by compression or expansion with no heat added or removed?

What is the approximate rate unsaturated air will cool flowing upslope?

Which process causes adiabatic cooling?

Adiabatic warming is also described as

Large areas of land

An inversion aloft with temperatures below freezing can

What is a feature of air movement in a high pressure area?

Which weather condition is defined as an anticyclone?

Where is the usual location of a thermal low?

En route at FL 270, the altimeter is set correctly. On descent, a pilot fails to set the local altimeter setting of 30.57. If the field elevation is 650 feet, and the altimeter is functioning properly, what will it indicate upon landing?

What is corrected altitude (approximate true altitude)?

What term describes an elongated area of low pressure?

Low pressure areas are areas of

If the ambient temperature is warmer than standard at FL 350, what is the density altitude compared to pressure altitude?

If the ambient temperature is colder than standard at FL 310, what is the relationship between true altitude and pressure altitude?

Which pressure is defined as station pressure?

Isobars on a surface weather chart represent lines of equal pressure

When the temperature is -20˚C at 15,000 feet indicated, you know that

*Given: Pressure altitude = 1,000 ft. True Air Temperature = 10˚C From the conditions given, the approximate density altitude is

At an indicated altitude of 9,000 feet with a temperature of 85˚F, the density altitude is

At an indicated altitude of 1,000 feet with a temperature of 32˚C, the density altitude is

At lower levels of the atmosphere, friction causes the wind to flow across isobars into a low because the friction

*Which type wind flows downslope becoming warmer and dryer?

*At which location does Coriolis force have the least effect on wind direction?

*How does Coriolis force affect wind direction in the Southern Hemisphere?

Any wind blowing down an incline where the incline is influential in causing the wind is a

Land surface heating on the coast results in

Land surface cooling on the coast results in

Freezing rain encountered during climb is normally evidence that

What temperature condition is indicated if precipitation in the form of wet snow occurs during flight?

What is the result when water vapor changes to the liquid state while being lifted in a thunderstorm?

What is a feature of supercooled water?

Which type precipitation is an indication that supercooled water is present?

What minimum thickness of cloud layer is indicated if precipitation is reported as light or greater intensity?

Which condition produces weather on the lee side of a large lake?

Middle clouds are considered to be the clouds between

Frozen dew is

Cumuliform clouds signify

Cloud formation is a process of

Cloud bases can usually be estimated by dividing the surface Fahrenheit temperature and dew point difference by

Stratus clouds are known for

Significant precipitation usually requires clouds to

How can the stability of the atmosphere be determined?

What is indicated about an air mass if the temperature remains unchanged or decreases slightly as altitude is increased?

What weather condition occurs at the altitude where the dewpoint lapse rate and the dry adiabatic lapse rate converge?

When saturated air moves downhill, its temperature increases

Which condition is present when a local parcel of air is stable?

If a sample of air is forced upward and it is colder than the surrounding air, it

The air is 100% saturated with vapor at

What is a feature of a stationary front?

Which event usually occurs after an aircraft passes through a front into the colder air?

What type weather change is to be expected in an area where frontolysis is reported?

Which atmospheric factor causes rapid movement of surface fronts?

In which meteorological conditions can frontal waves and low pressure areas form?

What weather difference is found on each side of a "dry line"?

Dew point fronts result from

Dew point fronts are also called

Steep frontal surfaces are usually associated with

Shallow frontal surfaces tend to give

When may hazardous wind shear be expected?

If the winds aloft are blowing across the front

Which is a necessary condition for the occurrence of a low-level temperature inversion wind shear?

What is the lowest cloud in the stationary group associated with a mountain wave?

Which type clouds are indicative of very strong turbulence?

Clear air turbulence (CAT) associated with a mountain wave may extend as far as

Which conditions result in the formation of frost?

What condition is indicated when ice pellets are encountered during flight?

When will frost most likely form on aircraft surfaces?

The following weather condition may be conducive to severe in-flight icing

What condition is necessary for the formation of structural icing in flight?

How will the airspeed indicator react if the ram air input to the pitot head is blocked by ice, but the drain hole and static port are not?

Which type of icing is associated with the smallest size of water droplet similar to that found in low-level stratus clouds?

Clear ice generally forms in outside temperature ranges of

The following weather may be conducive to severe inflight icing

The following weather may be conducive to severe inflight icing

Which of the following weather conditions are conducive to inflight icing?

What happens to residual ice that remains after deice boots are inflated and shed ice?

The most susceptible surface of the aircraft for ice accumulation is the

If you detect icing accumulation in flight, especially if the aircraft is not equipped with a deicing system, you should

When conditions favoring the formation of ice are present, pilots should check for ice accumulation prior to flight. The best way to do this is by

To recover from a tailplane stall brought on by ice accumulation, the pilot should

Tailplane icing can be detected by a(n)

Tailplane icing can be detected by

In an aircraft equipped with a pneumatic deicing system, the appropriate technique for removing ice is to

A tailplane stall as the result of ice accumulation is most likely to occur during

The most hazardous aspect of structural icing is that

If tailplane icing or a tailplane stall is detected, the pilot should

If icing is suspected on an airplane equipped with deicing equipment, the pilot should

What happens when a tailplane ices?

During icing conditions, a tailplane stall may

During icing conditions, a tailplane stall may

During icing conditions, a common tailplane stall symptom is

A tailplane stall in icing conditions may require

During icing conditions, a tailplane stall may

During icing conditions, a pilot's response to tailplane stall symptoms should include

The first place ice is likely to form on an aircraft is the

During an IFR cross-country flight you picked up rime icing which you estimate is ½" thick on the leading edge of the wings. You are now below the clouds at 2000 feet AGL and are approaching your destination airport under VFR. Visibility under the clouds is more than 10 miles, winds at the destination airport are 8 knots right down the runway, and the surface temperature is 3 degrees Celsius. You decide t

Freezing drizzle often forms by the

When advection fog has developed, what may tend to dissipate or lift the fog into low stratus clouds?

Which conditions are necessary for the formation of upslope fog?

How are haze layers cleared or dispersed?

Precipitation induced fog

Except for temperature, ice fog forms in conditions favorable to

Radiation fog forms

Visibility above a haze layer is poor when looking

Flight in haze

Advection fog usually deepens in winds up to

Blowing sand is seldom lifted above

Convective clouds which penetrate a stratus layer can produce which threat to instrument flight?

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

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

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

What is indicated by the term "embedded thunderstorms"?

Which type cloud is associated with violent turbulence and a tendency toward the production of funnel clouds?

Where do squall lines most often develop?

Where can the maximum hazard zone caused by wind shear associated with a thunderstorm be found?

Atmospheric pressure changes due to a thunderstorm will be at the lowest value

Why are downdrafts in a mature thunderstorm hazardous?

What is a difference between an air mass thunderstorm and a steadystate thunderstorm?

Which type storms are most likely to produce funnel clouds or tornadoes

*A clear area in a line of thunderstorm echoes on a radar scope indicates

When flying over the top of a severe thunderstorm, the cloud should be overflown by at least

*Which weather condition is an example of a nonfrontal instability band?

A steady state thunderstorms are associated with

Shear turbulence from a thunderstorm has been encountered

Intense radar storm echos should be avoided by a margin of

Downdrafts in thunderstorms can be expected to exceed

Storm gust fronts often move as much as

A thunderstorm first begins when

Downdrafts in a thunderstorm may exceed

What is an important characteristic of wind shear?

Turbulence encountered above 15,000 feet AGL, not associated withcloud formations, should be reported as

A strong wind shear can be expected

What is a likely location of clear air turbulences?

Where do the maximum winds associated with the jetstream usually occur?

The rate of decrease of wind speed from the jet stream core is considerably greater on the

Which type jetstream can be expected to cause the greater turbulence?

What weather feature occurs at altitude levels near the tropopause?

Where are jetstreams normally located?

Under what conditions would clear air turbulence (CAT) most likely be encountered?

What action is recommended when encountering turbulence due to a wind shift associated with a sharp pressure trough?

Where is the normal location of the jetstream relative to surface lows and fronts?

*Which type frontal system is normally crossed by the jetstream?

Which type clouds may be associated with the jetstream?

When high level moisture is available, cirrus clouds form on the

Which action is recommended if jetstream turbulence is encountered with a direct headwind or tailwind?

*Which action is recommended regarding an altitude change to get out of jetstream turbulence?

A jet stream is a riverlike flow of high-altitude wind following the planetary atmospheric wave patterns with speeds of

A jet stream is a narrow, shallow, meandering river of maximum winds extending around the globe in a wavelike pattern with speeds of

An upper level wind cannot be considered a jet stream unless the wind speed is at least

Clear air turbulence associated with a jet stream

There are how many jetstreams

The threshold wind speed in the jet stream for clear air turbulence is generally considered to be

In the mid-latitudes, wind speed in the jet stream averages considerably less in the

Which area or areas of the Northern Hemisphere experience a generally east to west movement of weather systems?

Summer thunderstorms in the arctic region will generally move

Which arctic flying hazard is caused when a cloud layer of uniform thickness overlies a snow or ice covered surface?

Whiteout conditions occur when

Which weather condition is present when the tropical storm is upgraded to a hurricane?

What is the general direction of movement of a hurricane located in the Caribbean or Gulf of Mexico region?

A cyclone is

A tropical cyclone is

A hurricane has formed when

A cyclone is similar to a tropical storm in

Gusts in tropical cyclones can exceed the average one-minute wind speed by as much as

Which weather condition is present when a tropical storm is upgraded to a typhoon

Tropical storms form when

A tropical depression has formed when