Exam quiz Meteorology - Quiz BPL Gas - Balloon Pilot License

Question 1

With regard to thunderstorms, strong up- and downdrafts appear during the...

Accepted Answer

Mature stage.

Answer

Dissipating stage.

Answer

Thunderstorm stage.

Answer

Initial stage.

Question 2

Weather phenomena are most common to be found in which atmospheric layer?

Accepted Answer

Troposphere

Answer

Thermosphere

Answer

Tropopause

Answer

Stratosphere

Question 3

Clouds in high layers are referred to as...

Accepted Answer

Cirro-.

Answer

Strato-

Answer

Alto-.

Answer

Nimbo-.

Question 4

What clouds and weather may result from an humid and instable air mass, that is pushed against a chain of mountains by the predominant wind and forced to rise?

Accepted Answer

Embedded CB with thunderstorms and showers of hail and/or rain.

Answer

Overcast low stratus (high fog) with no precipitation.

Answer

Smooth, unstructured NS cloud with light drizzle or snow (during winter).

Answer

Thin Altostratus and Cirrostratus clouds with light and steady precipitation.

Question 5

The altimeter can be checked on the ground by setting...

Accepted Answer

QNH and comparing the indication with the airfield elevation.

Answer

QNE and checking that the indication shows zero on the ground.

Answer

QFF and comparing the indication with the airfield elevation.

Answer

QFE and comparing the indication with the airfield elevation.

Question 6

How can wind speed and wind direction be derived from surface weather charts?

Accepted Answer

By alignment and distance of isobaric lines

Answer

By annotations from the text part of the chart

Answer

By alignment of lines of warm- and cold fronts

Answer

By alignment and distance of hypsometric lines

Question 7

Mountain side updrafts can be intensified by ...

Accepted Answer

Solar irradiation on the windward side

Answer

Solar irradiation on the lee side

Answer

Thermal radiation of the windward side during the night

Answer

By warming of upper atmospheric layers

Question 8

What can be expected for the prevailling wind with isobars on a surface weather chart showing large distances?

Accepted Answer

Low pressure gradients resulting in low prevailling wind

Answer

Strong pressure gradients resulting in strong prevailling wind

Answer

Strong pressure gradients resulting in low prevailling wind

Answer

Low pressure gradients resulting in strong prevailling wind

Question 9

What factors are required for the formation of precipitation in clouds?

Accepted Answer

Moderate to strong updrafts

Answer

High humidity and high temperatures

Answer

The presence of an inversion layer

Answer

Calm winds and intensive sunlight insolation

Question 10

What cloud type does the picture show? See figure (MET-004). Siehe Anlage 3

Accepted Answer

Cirrus

Answer

Altocumulus

Answer

Stratus

Answer

Cumulus

Question 11

How is an air mass described when moving to Central Europe via the Russian continent during winter?

Accepted Answer

Continental polar air

Answer

Continental tropical air

Answer

Maritime tropical air

Answer

Maritime polar air

Question 12

What cloud sequence can typically be observed during the passage of a warm front?

Accepted Answer

Cirrus, thickening altostratus and altocumulus clouds, lowering cloud base with rain, nimbostratus

Answer

Squall line with showers of rain and thunderstorms (Cb), gusting wind followed by cumulus clouds with isolated showers of rain

Answer

Wind becoming calm, dissipation of clouds and warming during summer; formation of extended high fog layers during winter

Answer

In coastal areas during daytime wind from the coast and forming of cumulus clouds, dissipation of clouds during evening and night

Question 13

The saturated adiabatic lapse rate should be assumed with a mean value of:

Accepted Answer

0,6° C / 100 m.

Answer

2° C / 1000 ft.

Answer

1,0° C / 100 m.

Answer

0° C / 100 m.

Question 14

At what rate does the temperature change with increasing height according to ISA (ICAO Standard Atmosphere) within the troposphere?

Accepted Answer

Decreases by 2° C / 1000 ft

Answer

Increases by 2° C / 1000 ft

Answer

Decreases by 2° C / 100 m

Answer

Increases by 2° C / 100 m

Question 15

The movement of air flowing together is called...

Accepted Answer

Convergence.

Answer

Subsidence.

Answer

Divergence.

Answer

Soncordence.

Question 16

Moderate to severe turbulence has to be expected...

Accepted Answer

On the lee side of a mountain range when rotor clouds are present.

Answer

Below thick cloud layers on the windward side of a mountain range

Answer

With the appearance of extended low stratus clouds (high fog).

Answer

Overhead unbroken cloud layers.

Question 17

What wind is reportet as 225/15 ?

Accepted Answer

South-west wind with 15 kt

Answer

North-east wind with 15 km/h

Answer

South-west wind with 15 km/h

Answer

North-east wind with 15 kt

Question 18

In a METAR, "(moderate) showers of rain" are designated by the identifier...

Accepted Answer

SHRA.

Answer

.+TSRA.

Answer

TS.

Answer

.+RA.

Question 19

Measured pressure distribution in MSL and corresponding frontal systems are displayed by the...

Accepted Answer

Surface weather chart.

Answer

Significant Weather Chart (SWC).

Answer

Prognostic chart.

Answer

Hypsometric chart.

Question 20

What is the gas composition of "air"?

Accepted Answer

Oxygen 21 % Nitrogen 78 % Noble gases / carbon dioxide 1 %

Answer

Oxygen 78 % Water vapour 21 % Nitrogen 1 %

Answer

Oxygen 21 % Water vapour 78 % Noble gases / carbon dioxide 1 %

Answer

Nitrogen 21 % Oxygen 78 % Noble gases / carbon dioxide 1 %

Question 21

What chart shows areas of precipitation?

Accepted Answer

Radar picture

Answer

GAFOR

Answer

Wind chart

Answer

Satellite picture

Question 22

The pressure at MSL in ISA conditions is...

Accepted Answer

1013.25 hPa.

Answer

113.25 hPa

Answer

1123 hPa.

Answer

15 hPa.

Question 23

The formation of medium to large precipitation particles requires...

Accepted Answer

Strong updrafts.

Answer

An inversion layer.

Answer

A high cloud base

Answer

Strong wind

Question 24

The "spread" is defined as...

Accepted Answer

Difference between actual temperature and dew point.

Answer

Difference between dew point and condensation point.

Answer

Relation of actual to maximum possible humidity of air

Answer

Maximum amount of water vapour that can be contained in air.

Question 25

What kind of reduction in visibility is not very sensitive to changes in temperature?

Accepted Answer

Haze (HZ)

Answer

Radiation fog (FG)

Answer

Mist (BR)

Answer

Patches of fog (BCFG)

Question 26

Cold air inflow in high tropospheric layers may result in...

Accepted Answer

Showers and thunderstorms.

Answer

Stabilisation and calm weather

Answer

Calm weather and cloud dissipation.

Answer

Frontal weather.

Question 27

What frontal line divides subtropical air from polar cold air, in particular across Central Europe?

Accepted Answer

Polar front

Answer

Warm front

Answer

Cold front

Answer

Occlusion

Question 28

How do spread and relative humidity change with increasing temperature?

Accepted Answer

Spread increases, relative humidity decreases

Answer

Spread increases, relative humidity increases

Answer

Spread remains constant, relative humidity increases

Answer

Spread remains constant, relative humidity decreases

Question 29

What is referred to as mountain wind?

Accepted Answer

Wind blowing down the mountain side during the night

Answer

Wind blowing uphill from the valley during daytime

Answer

Wind blowing uphill from the valley during the night.

Answer

Wind blowing down the mountain side during daytime

Question 30

The barometric altimeter indicates height above...

Accepted Answer

A selected reference pressure level.

Answer

Mean sea level.

Answer

Ground.

Answer

Standard pressure 1013.25 hPa.

Question 31

What weather conditions can be expected in high pressure areas during winter?

Accepted Answer

Calm winds and widespread areas with high fog

Answer

Squall lines and thunderstorms

Answer

Changing weather with passing of frontal lines

Answer

Calm weather and cloud dissipation, few high Cu

Question 32

What pressure pattern may result from cold-air inflow in high tropospheric layers?

Accepted Answer

Formation of a low in the upper troposphere

Answer

Formation of a large ground low

Answer

Alternating pressure

Answer

Formation of a high in the upper troposphere

Question 33

What pressure pattern can be observed during the passage of a polar front low?

Accepted Answer

Falling pressure in front of the warm front, constant pressure within the warm sector, rising pressure behind the cold front

Answer

Falling pressure in front of the warm front, constant pressure within the warm sector, falling pressure behind the cold front

Answer

Rising pressure in front of the warm front, constant pressure within the warm sector, rising pressure behind the cold front

Answer

Rising pressure in front of the warm front, rising pressure within the warm sector, falling pressure behind the cold front

Question 34

Clouds are basically distinguished by what types?

Accepted Answer

Cumulus and stratiform clouds

Answer

Layered and lifted clouds

Answer

Thunderstorm and shower clouds

Answer

Stratiform and ice clouds

Question 35

Which processes result in decreasing air density?

Accepted Answer

Increasing temperature, decreasing pressure

Answer

Increasing temperature, increasing pressure

Answer

Decreasing temperature, decreasing pressure

Answer

Decreasing temperature, increasing pressure

Question 36

What weather conditions can be expected during "Foehn" on the windward side of a mountain range?

Accepted Answer

Layered clouds, mountains obscured, poor visibility, moderate or heavy rain

Answer

Scattered cumulus clouds with showers and thunderstorms

Answer

Calm wind and forming of high stratus clouds (high fog)

Answer

Dissipating clouds with unusual warming, accompanied by strong, gusty winds

Question 37

An inversion layer close to the ground can be caused by...

Accepted Answer

Ground cooling during the night.

Answer

Large-scale lifting of air

Answer

Thickening of clouds in medium layers

Answer

Intensifying and gusting winds.

Question 38

What wind conditions can be expected in areas showing large distances between isobars?

Accepted Answer

Variable winds, formation of local wind systems

Answer

Formation of local wind systems with strong prevailing westerly winds

Answer

Strong prevailing westerly winds with rapid veering

Answer

Strong prevailing easterly winds with rapid backing

Question 39

What weather is likely to be experienced during "Foehn" in the Bavarian area close to the alps?

Accepted Answer

Nimbostratus cloud in the southern alps, rotor clouds at the lee side, warm and dry wind

Answer

High pressure area overhead Biskaya and low pressure area in Eastern Europe

Answer

Cold, humid downhill wind on the lee side of the alps, flat pressure pattern

Answer

Nimbostratus cloud in the northern alps, rotor clouds at the windward side, warm and dry wind

Question 40

Which stage of a thunderstorm is dominated by updrafts?

Accepted Answer

Cumulus stage

Answer

Upwind stage

Answer

Mature stage

Answer

Dissipating stage

Question 41

Which conditions are likely for the formation of advection fog?

Accepted Answer

Warm, humid air moves over a cold surface

Answer

Cold, humid air moves over a warm ocean

Answer

Humidity evaporates from warm, humid ground into cold air

Answer

Warm, humid air cools during a cloudy night

Question 42

What change of wind direction can be expected during the passage of a polar front low in Central Europe?

Accepted Answer

Veering wind during passage of the warm front, veering wind during passage of the cold front

Answer

Backing wind during passage of the warm front, veering wind during passage of the cold front

Answer

Backing wind during passage of the warm front, backing wind during passage of the cold front

Answer

Veering wind during passage of the warm front, backing wind during passage of the cold front

Question 43

The dry adiabatic lapse rate has a value of...

Accepted Answer

1,0° C / 100 m

Answer

0,6° C / 100 m

Answer

0,65° C / 100 m.

Answer

2° / 1000 ft.

Question 44

Regarding the type of cloud, precipitation is classified as...

Accepted Answer

Rain and showers of rain.

Answer

Light and heavy precipitation

Answer

Showers of snow and rain.

Answer

Prolonged rain and continuous rain.

Question 45

The character of an air mass is given by what properties?

Accepted Answer

Region of origin and track during movement

Answer

Wind speed and tropopause height

Answer

Environmental lapse rate at origin

Answer

Temperatures at origin and present region

Question 46

Which process may result in an inversion layer at about 5000 ft (1500 m) height?

Accepted Answer

Widespread descending air within a high pressure area

Answer

Intensive sunlight insolation during a warm summer day

Answer

Ground cooling by radiation during the night

Answer

Advection of cool air in the upper troposphere

Question 47

Temperatures will be given by meteorological aviation services in Europe in which unit?

Accepted Answer

Degrees Centigrade (° C)

Answer

Degrees Fahrenheit

Answer

Gpdam

Answer

Kelvin

Question 48

What type of fog emerges if humid and almost saturated air, is forced to rise upslope of hills or shallow mountains by the prevailling wind?

Accepted Answer

Orographic fog

Answer

Radiation fog

Answer

Steaming fog

Answer

Advection fog

Question 49

What factor may affect the top of cumulus clouds?

Accepted Answer

The presence of an inversion layer

Answer

The spread

Answer

Relative humidity

Answer

The absolute humidity

Question 50

What are the air masses that Central Europe is mainly influenced by?

Accepted Answer

Polar cold air and tropical warm air

Answer

Equatorial and tropical warm air

Answer

Tropical and arctic cold air

Answer

Arctic and polar cold air

Question 51

What process results in the formation of "advection fog"?

Accepted Answer

Warm, moist air is moved across cold ground areas

Answer

Cold, moist air is being moved across warm ground areas

Answer

Prolonged radiation during nights clear of clouds

Answer

Cold, moist air mixes with warm, moist air

Question 52

What conditions are favourable for the formation of thunderstorms?

Accepted Answer

Warm humid air, conditionally unstable environmental lapse rate

Answer

Warm and dry air, strong inversion layer

Answer

Clear night over land, cold air and patches of fog

Answer

Calm winds and cold air, overcast cloud cover with St or As.

Question 53

How do dew point and relative humidity change with decreasing temperature?

Accepted Answer

Dew point remains constant, relative humidity increases

Answer

Dew point increases, relative humidity decreases

Answer

Dew point remains constant, relative humidity decreases

Answer

Dew point decreases, relative humidity increases

Question 54

The term "tropopause" is defined as...

Accepted Answer

The boundary area between the troposphere and the stratosphere.

Answer

The layer above the troposphere showing an increasing temperature

Answer

The height above which the temperature starts to decrease.

Answer

The boundary area between the mesosphere and the stratosphere

Question 55

What weather conditions may be expected during conditionally unstable conditions?

Accepted Answer

Towering cumulus, isolated showers of rain or thunderstorms

Answer

Layered clouds up to high levels, prolonged rain or snow

Answer

Shallow cumulus clouds with base at medium levels

Answer

Sky clear of clouds, sunshine, low winds

Question 56

What phenomenon is caused by cold air downdrafts with precipitation from a fully developed thunderstorm cloud?

Accepted Answer

Gust front

Answer

Freezing Rain

Answer

Electrical discharge

Answer

Anvil-head top of Cb cloud

Question 57

What is the usual direction of movement of a polar front low?

Accepted Answer

Parallel to the the warm-sector isobars

Answer

To the northeast during winter, to the southeast during summer

Answer

To the northwest during winter, to the southwest during summer

Answer

Parallel to the warm front line to the south

Question 58

When air masses meet each other head on, how is this referred to and what air movements will follow?

Accepted Answer

Convergence resulting in air being lifted

Answer

Divergence resulting in air being lifted

Answer

Convergence resulting in sinking air

Answer

Divergence resulting in sinking air

Question 59

What situation may result in the occurrence of severe wind shear?

Accepted Answer

When a shower is visible close to the airfield

Answer

Cross-country flying below Cu clouds with about 4 octas coverage

Answer

During final approach, 30 min after a heavy shower has passed the airfield

Answer

Flying ahead of a warm front with visible Ci clouds

Question 60

With other factors remaining constant, decreasing temperature results in...

Accepted Answer

Decreasing spread and increasing relative humidity.

Answer

Decreasing spread and decreasing relative humidity.

Answer

Increasing spread and decreasing relative humidity.

Answer

Increasing spread and increasing relative humidity.

Question 61

The symbol labeled (3) as shown in the picture is a / an... See figure (MET-005) Siehe Anlage 4

Accepted Answer

Occlusion.

Answer

Cold front.

Answer

Warm front.

Answer

Front aloft.

Question 62

The movement of air flowing apart is called...

Accepted Answer

Divergence.

Answer

Concordence.

Answer

Convergence.

Answer

Subsidence.

Question 63

The temperature lapse rate with increasing height within the troposphere according ISA is...

Accepted Answer

0,65° C / 100 m

Answer

1° C / 100 m

Answer

0,6° C / 100 m.

Answer

3° C / 100 m

Question 64

What is meant by "inversion layer"?

Accepted Answer

An atmospheric layer where temperature increases with increasing height

Answer

A boundary area between two other layers within the atmosphere

Answer

An atmospheric layer with constant temperature with increasing height

Answer

An atmospheric layer where temperature decreases with increasing height

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