Chapter 6.2 (41-60)

chapter-6-2-41-60

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Question 1 of 1

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Possible mountain wave turbulence could be anticipated when winds of 40 knots or greater blow

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Explanation

Mountain waves are formed when strong winds (40 knots or greater) flow across a barrier, such as a mountain ridge. When the air is stable, the flow is laminar, or layered, and create a series of waves. Unstable air that is forced upward tends to continue

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Where does wind shear occur?

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Wind shear can occur at middle and high altitudes near thunderstorms or the jet stream, and near the ground in the vicinity of thunderstorms or temperature inversions. The shear can be either vertical or horizontal.

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When may hazardous wind shear be expected?

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Wind shear can be found above a temperature inversion when the surface air is cold and calm, and the warmer layer above it is moving at 25 knots or more. Since frontal zones are identified by a shift in the wind, wind shear can be expected. Clear air turb

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A pilot can expect a wind-shear zone in a temperature inversion whenever the windspeed at 2,000 to 4,000 feet above the surface is at least

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Explanation

A temperature inversion with light surface winds may form near the surface on a clear night. You can expect a shear zone in the inversion if the winds at 2,000 to 4,000 feet are 25 knots or more.

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One in-flight condition necessary for structural icing to form is

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Explanation

Structural icing requires two conditions to form: (1) visible moisture, such as rain or cloud droplets, and (2) temperature of the aircraft surface must be at or below freezing. A small temperature/dewpoint spread may be present without visible moisture.

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In which environment is aircraft structural ice most likely to have the highest accumulation rate?

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Explanation

The rate of structural ice accumulation is usually the highest in freezing rain below a frontal surface. As the rain falls through air with temperatures below freezing it becomes supercooled. The supercooled drops freeze on impact with the large water dro

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Why is frost considered hazardous to flight?

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Explanation

Frost disrupts the smooth airflow over the wing and can cause early separation of the airflow, resulting in a loss of lift.

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How does frost affect the lifting surfaces of an airplane on takeoff?

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Explanation

Frost disrupts the smooth airflow over the wing and can cause early separation of the airflow, resulting in a loss of lift. By disrupting the airflow over the wings, frost can prevent an airplane from becoming airborne at the normal takeoff speed.

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

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Explanation

Three conditions are normally required for the formation of cumulonimbus clouds. These are lifting action, instability and moisture.

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

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Explanation

In the early, or cumulus, stage of a thunderstorm, continuous updrafts cause the cloud to build upwards.

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

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Explanation

The mature stage of a thunderstorm begins when the rain drops grow too large to be supported by the updrafts, and precipitation begins to fall.

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The destination airport has one runway, 08-26, and the wind is calm. The normal approach in calm wind is a left-hand pattern to runway 08. There is no other traffic at the airport. A thunderstorm about 6 miles west is beginning its mature stage, and rain is starting to reach the ground. The pilot decides to

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Explanation

The outflow from a mature thunderstorm west of the airport cloud create significant winds from the west. If landing on Runway 08, the aircraft could experience a dangerous sheer to a tailwind. Landing to the west, on Runway 26, is the best choice. In addi

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What conditions are necessary for the formation of thunderstorms?

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Explanation

Three conditions are normally required for the formation of cumulonimbus clouds. These are lifting action, instability and moisture. As moist, unstable air is lifted, it builds cumulonimbus clouds, which form thunderstorms.

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

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Explanation

As moist, unstable air is lifted, it builds cumulonimbus clouds, which form thunderstorms. The mature stage of a thunderstorm begins when the rain drops grow too large to be supported by the updrafts, and precipitation begins to fall. As a thunderstorm di

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Thunderstorms reach their greatest intensity during the

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Explanation

Thunderstorm are most violent during the mature stage, with strong updrafts and downdrafts, severe turbulence, lightning, heavy rain, hail, strong surface winds, and gust fronts.

Chapter 6.2 (41-60)

Question 1 of 1

Time Left

Possible mountain wave turbulence could be anticipated when winds of 40 knots or greater blow

Select the correct answer(s).

(0/0)

Explanation

Where does wind shear occur?

Select the correct answer(s).

(0/0)

Explanation

When may hazardous wind shear be expected?

Select the correct answer(s).

(0/0)

Explanation

A pilot can expect a wind-shear zone in a temperature inversion whenever the windspeed at 2,000 to 4,000 feet above the surface is at least

Select the correct answer(s).

(0/0)

Explanation

One in-flight condition necessary for structural icing to form is

Select the correct answer(s).

(0/0)

Explanation

In which environment is aircraft structural ice most likely to have the highest accumulation rate?

Select the correct answer(s).

(0/0)

Explanation

Why is frost considered hazardous to flight?

Select the correct answer(s).

(0/0)

Explanation

How does frost affect the lifting surfaces of an airplane on takeoff?

Select the correct answer(s).

(0/0)

Explanation

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

Select the correct answer(s).

(0/0)

Explanation

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

Select the correct answer(s).

(0/0)

Explanation

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

Select the correct answer(s).

(0/0)

Explanation

Select the correct answer(s).

(0/0)

Explanation

What conditions are necessary for the formation of thunderstorms?

Select the correct answer(s).

(0/0)

Explanation

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

Select the correct answer(s).

(0/0)

Explanation

Thunderstorms reach their greatest intensity during the

Select the correct answer(s).

(0/0)

Explanation

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