Weather

What feature is normally associated with the cumulues stage of a thunderstorm?. Continous updraft. N/A. N/A.

Advection fog has drifted over a coastal airport during the day. What may tend to dissipate or lift this fog into low stratus clouds?. Wind 15 knots or stronger. N/A. N/A.

In what ways do advection fog, radiation fog, and steam fog differ in their formation or location?. Radiation fog is restricted to land areas; advection fog is most common along coastal areas; steam fog forms over a water surface. N/A. N/A.

One of the most dangerous of mountain waves is the turbulent areas in and. below rotor clouds. N/A. N/A.

The most sever weather conditions, such as destructive winds, heavy hail, and tornadoes, are generally associated with. squall lines. N/A. N/A.

A moist, unstable air mass is characterized by. cumuliform clouds and showey precipitation. N/A. N/A.

Moisture is added to air by. evaporation and sublimation. N/A. N/A.

While flying cross-country, in the Northern Hemisphere, you experience a continous left crosswind which is associated with a major wind system. This indicates that you. are flying toward an area of generally unfavorable weather conditions. N/A. N/A.

Which statement is true regarding squall lines?. They are nonfrontal and often contain severe, steady-state thunderstorms. N/A. N/A.

During departure, under conditions of suspected low-level wind shear, a sudden decrease in headwinf will cause. a loss in airspeed equal to the decrease in wind velocity. N/A. N/A.

Thunderstorms identified as severe or giving an intense radar echo sould be avoided by what distance?. At least 20 miles. N/A. N/A.

Which situation would most likely result in freezing precipitation? Rain falling from air which has a temperature of. more than 32 F into air having a temperature of 32 F or less. N/A. N/A.

Low-level wind shear may occur when. there is a low-level temperature inversion with strong winds above the inversion. N/A. N/A.

Which statement is true concerning the hazards of hail?. Hailstones may be encountered in clear air several miles from a thunderstorm. N/A. N/A.

With respect to advection fog, which statement is true?. It can appear suddenly during day or night, and it is more persistent than radiation fog. N/A. N/A.

What is indicated if ice pellets are encountered at 8,000 feet?. Freezinf rain at higher altitude. N/A. N/A.

Which statement is true concerning squall lines?. They offer the most intense weather hazards to aircraft. N/A. N/A.

What kifts advection fog into low stratus clouds?. Surface winds of approximately 15 knots or stronger. N/A. N/A.

GIVEN: Winds at 3,000 feet AGL 30 kts Surface winds Calm While on approach for landing under clear skies with convective turbulence a few hours after sunrise, one should. increase approach airspeed slightly above normal to avoid stalling. N/A. N/A.

A common location of clear air turbulence is. in an upper trough on the polar side of a jet stream. N/A. N/A.

Which conditions are favorable for the formation of a surface based temperature inversion?. Clear, cool nights with calm or light wind. N/A. N/A.

The conditions necessary for the formation of cumulonimbus clouds are a lifting action and. unstable, moist air. N/A. N/A.

Frost covering the upper surface of an airplane wing usually will cause. the airplane to stall at an angle of attack lower than normal. N/A. N/A.

Select the true statement pertaining to the life cycle of a thunderstorm. The beginning of rain at the Earth´s surface indicates the mature stage of the thunderstorm. N/A. N/A.

What determines the structure or type of clouds which will form as a result of air being forced to ascend?. The stability of air before lifting occurs. N/A. N/A.

Every physical process of weather is accompanied by or is the result of. A heat exchange. N/A. N/A.

Which combinatio of weather-producing variables would likely result in cumuliform-type clouds, good visibility, and showery rain?. Unstable, moist air and orographic lifting. N/A. N/A.

When conditionally unstable air with high moisture content and very warm surface temperature is forecast, one can expect what typw of weather?. Strong updrafts and cumulonimbus clouds. N/A. N/A.

When flying low over hilly terrain, ridges, or mountain ranges, the greatest potential danger from turbulent air currents will usually be encountered on the. leeward side when flying into the wind. N/A. N/A.

Ice pellets encountered during flight normally are evidence that. a warm front is about to pass. N/A. N/A.

If a temperature inversion is encountered immediately after takeoff or during an approach to a landing, a potential hazard exists due to. wind shear. N/A. N/A.

Which is true regarding actual air temperature and dewpoint temperature spread? The temperature spread. decreases as the relative humidity increases. N/A. N/A.

What type weather can one expect from moist, unstable air, and very warm surface temperatures?. Strong uodrafts and cumulonimbus clouds. N/A. N/A.

Which in-flight hazard is most commonly associated with warm fronts?. Precipitation-induced fog. N/A. N/A.

Which is true regarding high- or low-pressure systems?. A low-pressure area or trough is an area of rising air. N/A. N/A.

What are the characteristics of an unstable atmosphere?. A warm, humid air mass. N/A. N/A.

What causes wind?. Pressure differences. N/A. N/A.

Hail is most likely to be associated with. cumulonimbus clouds. N/A. N/A.

When an air mass is stable, which of these conditions are most likely to exist?. Smoke, dust, haze, etc., concentrated at the lower levels with resulting poor visibility. N/A. N/A.

Which is true regarding a cold front occlusion? The air ahead of the warm front. is warmer than the air behind the overtaking cold front. N/A. N/A.

Which type of jetstream can be expected to cause the greater turbulence?. A curvng jetstream associated with a deep low-pressure trough. N/A. N/A.

The strength and location of the jet stream is normally. weaker and farther north in the summer. N/A. N/A.

If airborne radar is indicating an extremely intense thunderstorm echo, this thunderstorm should be avoided by a distance of at least. 20 miles. N/A. N/A.

Convective currents are most active on warm summer afternoons when winds are. light. N/A. N/A.

Which is true regarding the use of airborne weather-avoidance radar for the recognition of certain weather conditions?. The radarscope provides no assurance of avoiding instrument weather conditions. N/A. N/A.

Why does the wind have a tendency to flow parallel to the isobars above the friction level?. Coriolis force tends to counterbalance the horizontal pressure gradient. N/A. N/A.

Virga is best described as. streamers of precipitation trailing beneath clouds which evaporates before reaching the ground. N/A. N/A.

The general circulation of air associated with a high-pressure area in the Northern Hemisphere is. outward, downward, and clockwise. N/A. N/A.

Hazardous wind shear is commonly encountered. in areas of temperature inversion and near thunderstorms. N/A. N/A.

The formation of either predominantly stratiform or predominantly cumuliform clouds is dependent upon the. stability of the air being lifted. N/A. N/A.

During an approach, the most important and most easily recognized means of being alerted to possible wind shear is monitoring the. power and vertical velocity required to remain on the proper glidepath. N/A. N/A.

You are avoiding a thunderstorm that is in your flightpath. You are over 20 miles from the cell however, you are under the anvil of the cell. Is this a hazard?. Yes, hail can be discharged from the anvil. N/A. N/A.

During the winter months in the middle latitudes, the jet stream shifts toward the. south and speed increases. N/A. N/A.

Which is true with respect to a high- or low-pressure system?. A high-pressure area or ridge is an area of descending air. N/A. N/A.

Which cloud types would indicate convective turbulence?. Towering cumulus clouds. N/A. N/A.

You have delayed your flight to allow a fast moving cold front to clear your destination airport before arrival. What type of flying conditions would you expect after the front has passed?. A fast moving squall line with high winds and thunderstorms. N/A. N/A.

There is a high pressure system that is located south of your planned route in the Northern Hemisphere on a west to east cross-country flight. To take advantage of favorable winds, you would plan your route. on the north side of the high pressure area. N/A. N/A.

Which feature is associated with the tropopause?. Abrupt change in temperature lapse rate. N/A. N/A.

A strong wind shear can be expected. on the low-pressure side of a jetstream core where the speed at the core is stronger than 110 knots. N/A. N/A.

The conditions necessary for the formation of stratiform clouds are a lifting action and. stable, moist air. N/A. N/A.

What prevents air from flowing directly from high-pressure areas to low-pressure areas?. Coriolis force. N/A. N/A.

What are the characteristics of stable air?. Poor visibility; steady precipitation; stratus clouds. N/A. N/A.

What minimum distance should exist between intense radar echoes before any attempt is made to fly between these thunderstorms?. 40 miles. N/A. N/A.

The greatest threats to an aircraft operating in the vicinity of thunderstorms are: hail and turbulence. N/A. N/A.

Which would decrease the stability of an air mass?. Warming from below. N/A. N/A.

Of the following, which is accurate regarding turbulence associated with thunderstorms?. Outside the cloud, shear turbulence can be encountered 20 miles laterally from a severe storm. N/A. N/A.

If clouds form as a result of very stable, moist air being forced to ascend a mountain slope, the clouds will be. stratus type with little vertical development and little or no turbulence. N/A. N/A.

A situation most conducive to the formation of advection fog is. an air mass moving inland from the coastline during the winter. N/A. N/A.

Which weather phenomenon signals the beginning of the mature stage of a thunderstorm?. The start of rain. N/A. N/A.

When flying into a low-pressure area in the Northern Hemisphere, the wind direction and velocity will be from the. left and increasing. N/A. N/A.

The conditions most favorable to wave formation over mountainous areas are a layer of. stable air at mountaintop altitude and a wind of at least 20 knots blowing across the ridge. N/A. N/A.

Which would increase the stability of an air mass?. Cooling from below. N/A. N/A.

What is an important characteristic of wind shear?. It can be present at any level and can exist in both horizontal and vertical direction. N/A. N/A.

What visible signs indicate extreme turbulence in thunderstorms?. Cumulonimbus clouds, very frequent lightning, and roll clouds. N/A. N/A.

In the Northern Hemisphere, the wind is deflected to the. right by Coriolis force. N/A. N/A.

Refer to excerpt from the following METAR report: KTUS.....08004KT 4SM HZ.....26/04 A2995 RMK RAE36 At approximately what altitude AGL should bases of convective -type cumuliform clouds be expected?. 8,800 feet. N/A. N/A.

What is a characteristic of stable air?. Stratiform clouds. N/A. N/A.

Which are characteristics of a cold air mass moving over a warm surface?. Cumuliform clouds, turbulence, and good visibility. N/A. N/A.

The jet stream and associated clear air turbulence can sometimes be visually identified in flight by. long streaks of cirrus clouds. N/A. N/A.

During the life cycle of a thunderstorm, which stage is characterized predominately by downdrafts?. Dissipating. N/A. N/A.

The low-level wind shear Alert System (LLWAS) provides wind data and software process to detect the presence of a. change in wind direction and/or speed within a very short distance above the airport. N/A. N/A.

The wind system associated with a low-pressure area in the Northern Hemisphere is. a cyclone and is caused by Coriolis force. N/A. N/A.

During an IFR cross-country flight you picked up rime icing which you estimate is 1/2" thick on the leading edge of the wings. You are now below the clouds at 2,000 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 C. You decide to. use a faster than normal approach and landing speed. N/A. N/A.

What is the approximate base of the cumulus clouds if the temperature at 2,000 feet MSL in 10 C and the dewpoint is 1 C?. 6,000 feet MSL. N/A. N/A.

With regard to windflow patterns shown on surface analysis charts; when the isobars are. close together, the pressure gradient force is greater and wind velocities are stronger. N/A. N/A.

Fog produced by frontal activity is a result of saturation due to. evaporation of precipitation. N/A. N/A.

From which measurement of the atmosphere can stability be determined?. The ambient lapse rate. N/A. N/A.

Density altitude is the vertical distance above mean sea level in the standard atmosphere at which. a given atmospheric density is to be found. N/A. N/A.

Which is a characteristic typical of a stable air mass?. Continuous precipitation. N/A. N/A.

The presence of standing lenticular altocumulus clouds is a good indication of. very strong turbulence. N/A. N/A.

Which is a characteristic of stable air?. Restricted visibility. N/A. N/A.

Ice pellets encountered during flight are normally evidence that. freezing rain exists at higher altitudes. N/A. N/A.