Weather 1

Question 1

In what part of the atmosphere does most weather occur?

Answer 1

Troposphere.

Question 2

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

Answer 2

Terrestrial radiation on a clear, relatively still night

Question 3

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

Answer 3

south of a high and to the north of a low

Question 4

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

Answer 4

outward, downward, and clockwise

Question 5

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

Answer 5

The temperature spread decreases as the relative humidity increases

Question 6

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

Answer 6

relative humidity.

Question 7

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

Answer 7

Sublimation

Question 8

From which measurement of the atmosphere can stability be determined?

Answer 8

Ambient lapse rate.

Question 9

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?

Answer 9

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

Question 10

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

Answer 10

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

Question 11

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

Answer 11

6,500 to 23,000 feet.

Question 12

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

Answer 12

Nimbostratus.

Question 13

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.

Answer 13

1,3,6

Question 14

The weather condition normally associated with unstable air is

Answer 14

good visibility, except in blowing sand or snow.

Question 15

Frontal waves normally form on

Answer 15

slow-moving cold fronts or stationary fronts.

Question 16

Cool air moving over a warm surface is generally characterized by

Answer 16

instability and showers.

Question 17

Which statement is true regarding a cold front occlusion?

Answer 17

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

Question 18

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

Answer 18

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

Question 19

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

Answer 19

A wind shear with the possibility of sudden loss of airspeed

Question 20

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

Answer 20

cumuliform clouds.

Question 21

Which is an operational consideration regarding aircraft structural icing?

Answer 21

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

Question 22

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

Answer 22

Steady state thunderstorms associated with cold fronts or squall lines

Question 23

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

Answer 23

Cumulonimbus mamma

Question 24

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.

Answer 24

2,4,and 5

Question 25

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

Answer 25

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

Question 26

Hail will most likely be encountered

Answer 26

beneath the anvil cloud of a large cumulonimbus.

Question 27

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

Answer 27

Precipitation-induced fog.

Question 28

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.

Answer 28

2,4, and 6.

Question 29

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

Answer 29

($)

Question 30

SLPNO.

Answer 30

sea level pressure is not available.