Exam quiz Meteorology - Exam BPL Gas - Balloon Pilot License

Question 1

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 2

The symbol labeled (2) as shown in the picture is a / an... See figure (MET-005)

Accepted Answer

Warm front

Answer

Front aloft

Answer

Cold front

Answer

Occlusion

Question 3

Light turbulence always has to be expected...

Accepted Answer

Below cumulus clouds due to thermal convection

Answer

When entering inversions

Answer

Above cumulus clouds due to thermal convection

Answer

Below stratiform clouds in medium layers

Question 4

The movement of air flowing together is called...

Accepted Answer

Convergence

Answer

Subsidence

Answer

Divergence

Answer

Confluence

Question 5

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 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

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 8

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 9

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 10

Clouds in high layers are referred to as...

Accepted Answer

Cirro-

Answer

Strato-

Answer

Alto-

Answer

Nimbo-

Question 11

How does air temperature change in ISA from MSL to approx. 10000 m height?

Accepted Answer

From +15° to -50°C

Answer

From +30° to -40°C

Answer

From -15° to 50°C

Answer

From +20° to -40°C

Question 12

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 13

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 14

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 15

What cloud type does the picture show? See figure (MET-002).

Accepted Answer

Cumulus

Answer

Altus

Answer

Stratus

Answer

Cirrus

Question 16

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 17

Above the friction layer, with a prevailing pressure gradient, the wind direction is...

Accepted Answer

Parallel to the isobars

Answer

At an angle of 30° to the isobars towards low pressure

Answer

Perpendicular to the isobars

Answer

Perpendicular to the isohypses

Question 18

What is meant by "isothermal layer"?

Accepted Answer

An atmospheric layer with constant temperature with increasing height

Answer

A boundary area between two other layers within the atmosphere

Answer

An atmospheric layer where temperature decreases with increasing height

Answer

An atmospheric layer where temperature increases with increasing height

Question 19

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 20

What is the mass of a "cube of air" with the edges 1 m long, at MSL according ISA?

Accepted Answer

1.225 kg

Answer

0.1225 kg

Answer

12.25 kg

Answer

0.01225 kg

Question 21

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

Accepted Answer

Parallel to 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 22

The movement of air flowing apart is called...

Accepted Answer

Divergence

Answer

Concordance

Answer

Convergence

Answer

Subsidence

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

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

Accepted Answer

Troposphere

Answer

Thermosphere

Answer

Tropopause

Answer

Stratosphere

Question 25

Which answer contains every state of water found in the atmosphere?

Accepted Answer

Liquid, solid and gaseous

Answer

Gaseous and liquid

Answer

Liquid and solid

Answer

Liquid

Question 26

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 27

What pressure pattern can be observed when a cold front is passing?

Accepted Answer

Shortly decreasing, thereafter increasing pressure

Answer

Continually decreasing pressure

Answer

Constant pressure pattern

Answer

Continually increasing pressure

Question 28

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 29

What visual flight conditions can be expected within the warm sector of a polar front low during summer time?

Accepted Answer

Moderate to good visibility, scattered clouds

Answer

Visibility less than 1000 m, cloud-covered ground

Answer

Moderate visibility, heavy showers and thunderstorms

Answer

Good visibility, some isolated high clouds

Question 30

What process causes latent heat being released into the upper troposphere?

Accepted Answer

Cloud forming due to condensation

Answer

Descending air across widespread areas

Answer

Evaporation over widespread water areas

Answer

Stabilisation of inflowing air masses

Question 31

The pressure at MSL in ISA conditions is...

Accepted Answer

1013.25 hPa

Answer

113.25 hPa

Answer

1123 hPa

Answer

15 hPa

Question 32

"Foehn" conditions usually develop with...

Accepted Answer

Stability, widespread air blown against a mountain ridge

Answer

Instability, widespread air blown against a mountain ridge

Answer

Stability, high pressure area with calm wind

Answer

Instability, high pressure area with calm wind

Question 33

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 34

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 35

What type of turbulence is typically found close to the ground on the lee side during Foehn conditions?

Accepted Answer

Turbulence in rotors

Answer

Clear-air turbulence (CAT)

Answer

Inversion turbulence

Answer

Thermal turbulence

Question 36

In a METAR, "heavy rain" is designated by the identifier...

Accepted Answer

+RA

Answer

RA

Answer

+SHRA

Answer

SHRA

Question 37

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 38

What wind is reported 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 39

Which stage of a thunderstorm is dominated by updrafts?

Accepted Answer

Cumulus stage

Answer

Upwind stage

Answer

Mature stage

Answer

Dissipating stage

Question 40

Under which conditions "back side weather" ("Rückseitenwetter") can be expected?

Accepted Answer

After passing of a cold front

Answer

During Foehn at the lee side

Answer

Before passing of an occlusion

Answer

After passing of a warm front

Question 41

Which weather chart shows the actual air pressure as in MSL along with pressure centers and fronts?

Accepted Answer

Surface weather chart

Answer

Wind chart

Answer

Hypsometric chart

Answer

Prognostic chart

Question 42

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 43

Which force causes "wind"?

Accepted Answer

Pressure gradient force

Answer

Thermal force

Answer

Coriolis force

Answer

Centrifugal force

Question 44

The barometric altimeter with QNH setting indicates...

Accepted Answer

Height above MSL

Answer

Height above the pressure level at airfield elevation

Answer

Height above standard pressure 1013.25 hPa

Answer

True altitude above MSL

Question 45

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 46

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 47

What process results in the formation of "orographic fog" ("hill fog")?

Accepted Answer

Warm, moist air is moved across a hill or a mountain range

Answer

Prolonged radiation during nights clear of clouds

Answer

Evaporation from warm, moist ground area into very cold air

Answer

Cold, moist air mixes with warm, moist air

Question 48

With regard to global circulation within the atmosphere, where does polar cold air meet subtropical warm air?

Accepted Answer

At the polar front

Answer

At the subtropical high pressure belt

Answer

At the equator

Answer

At the geographic poles

Question 49

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 50

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 51

What clouds and weather may result from a humid and unstable 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 52

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 53

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 54

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 55

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 56

What weather phenomena have to be expected around an upper-level trough?

Accepted Answer

Development of showers and thunderstorms (Cb)

Answer

Formation of high stratus clouds, ground-covering cloud bases

Answer

Calm weather, formation of lifted fog layers

Answer

Calm wind, forming of shallow cumulus clouds

Question 57

What is the ISA standard pressure at FL 180 (5500 m)?

Accepted Answer

500 hPa

Answer

1013.25 hPa

Answer

300 hPa

Answer

250 hPa

Question 58

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

Accepted Answer

Low pressure gradients resulting in low prevailing wind

Answer

Strong pressure gradients resulting in strong prevailing wind

Answer

Strong pressure gradients resulting in low prevailing wind

Answer

Low pressure gradients resulting in strong prevailing wind

Question 59

The symbol labeled (1) as shown in the picture is a / an... See figure (MET-005)

Accepted Answer

Cold front

Answer

Front aloft

Answer

Occlusion

Answer

Warm front

Question 60

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 61

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 Biscay 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 62

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 63

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 64

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

Exam simulation Meteorology - Exam BPL Gas - Balloon Pilot License

Exam simulation Gas Balloon Pilot Exam BPL Meteorology 120 questions on 120 minutes

Exam simulation Meteorology - Exam BPL Gas - Balloon Pilot License

Exam simulation Gas Balloon Pilot Exam BPL Meteorology 120 questions on 120 minutes

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