Weather 1 Flashcards

1
Q

In what part of the atmosphere does most weather occur?

A

Troposphere.

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2
Q

The most frequent type of ground based or surface based temperature inversion is produced by

A

Terrestrial radiation on a clear, relatively still night

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3
Q

In tile Northern Hemisphere, a pilot making a long distance flight from east to west would most
likely find favorable winds associated with high-and low-pressure systems by flying to the

A

south of a high and to the north of a low

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4
Q

The general circulation of air associated with a high-pressure area in the Northern
Hemisphere is

A

outward, downward, and clockwise

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5
Q

which us an operational considerations regarding actual air temperature and dewpoint?

A

The temperature spread decreases as the relative humidity increases

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6
Q

The ratio of the existing water vapor in the air, as compared to the maximum amount that could exist at a given temperature, is called

A

relative humidity.

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7
Q

What is the process by which ice can form on a surface directly from water vapor on a cold, clear night?

A

Sublimation

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8
Q

From which measurement of the atmosphere can stability be determined?

A

Ambient lapse rate.

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9
Q

At approximately what altitude above the surface would you expect the base of cumuliform clouds if the surface air temperature is 77°F and the dewpoint is 53”F?

A

77 - 53 =24
divide by the degrees F convergence rate of 4.4 f 4.4 per 1,000 ft. 24 / 4.4 - 5.45 So 5.45 thousands of feet, or 5450 feet

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10
Q

At approximately what altitude above the surface would You expect the base of cumuliform clouds if the surface air temperature is 33 C and the dew point is 15C

A

33 - 15 = 18, and divide by the degrees C convergence rate of
2.5 per 1,000 ft. 18 / 2.5 - 7.2 So 7.2 thousands of feet, or 7,200 feet

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11
Q

The height of the bases of the middle clouds in the middle latitudes ranges from

A

6,500 to 23,000 feet.

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12
Q

Which middle level clouds are characterized by rain, snow, or ice pellets posing a serious icing problem if temperatures are near or below freezing?

A

Nimbostratus.

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13
Q

A moist air mass, which is colder than the surface over which it passes, frequently has which of
the above characteristics?:
1. Cumuliform clouds.
2. Stable lapse rate.
3. Unstable lapse rate.
4. Stratiform clouds and fog.
5. Smooth air (above the friction level) and poor visibility.
6. Turbulence up to about 10,000 feet and good visibility except in areas of precipitation.

A

1,3,6

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14
Q

The weather condition normally associated with unstable air is

A

good visibility, except in blowing sand or snow.

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15
Q

Frontal waves normally form on

A

slow-moving cold fronts or stationary fronts.

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16
Q

Cool air moving over a warm surface is generally characterized by

A

instability and showers.

17
Q

Which statement is true regarding a cold front occlusion?

A

The air ahead of the warm front is warmer than the air behind the overtaking cold front

18
Q

Low-level wind shear, which results in a sudden change of wind direction, may occur

A

when there is a \ow-level temperature inversion with strong winds above the inversion

19
Q

Which condition could be expected if a strong Temperature inversion exists near the surface?

A

A wind shear with the possibility of sudden loss of airspeed

20
Q

The most rapid accumulation of clear ice on an aircraft in flight occur with temperatures
between 0to -15°C in

A

cumuliform clouds.

21
Q

Which is an operational consideration regarding aircraft structural icing?

A

In order for structural ice to form the temperatures at the point where moisture strikes the aircraft must be ) 0 C or colder

22
Q

Tornadoes are most likely to occur with which type of thunderstorms?

A

Steady state thunderstorms associated with cold fronts or squall lines

23
Q

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

A

Cumulonimbus mamma

24
Q

Choose the correct ones for hail?

  1. There is a correlation between the visual appearance of thunderstorms and the amount of hail within them
  2. Large hail is most commonly found in thunderstorms which have strong updrafts and large liquid content.
  3. Hail maybe found at any level within at thunderstorm but not in the clear air outside of the storm cloud.
  4. Hail is usually produced during the mature stage of the thunderstorm’s life span.
  5. Hailstones may be thrown upward and outward from a storm cloud for several miles.
A

2,4,and 5

25
Q

Which statement is true concerning the in-flight hazard of hail?

A

Hailstones may be thrown outward from a storm cloud for several miles.

26
Q

Hail will most likely be encountered

A

beneath the anvil cloud of a large cumulonimbus.

27
Q

Which in-flight hazard is most commonly associated with warm fronts?

A

Precipitation-induced fog.

28
Q

Consider the following statements regarding an Aviation Routine Weather Report (METAR).
1. A vertical visibility entry does not constitute a ceiling
2. Fog (FG) can be reported only if the visibility is less than 5/8 mile.
3. The ceiling layer will be designated by a ‘C’.
4. Mist (BR) can be reported only if the visibility is 5/8 mile up to six miles
5. Temperatures reported below zero will be prefixed with a’-‘.
6. There is no provision to report partial obscurations.
Select the true statements.

A

2,4, and 6.

29
Q

A maintenance indicator _____ is coded when an automated system detects that maintenance is
needed on the system.

A

($)

30
Q

SLPNO.

A

sea level pressure is not available.