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ATPL Meteorology > Review Test Questions > Flashcards

Review Test Questions Flashcards

1
Q

Our weather is due to the atmosphere being heated mainly by -

A. Radiation from the sun
B. Insolation from the sun
C. Radiation from the earth
D. Advection

A

C. Radiation from the earth

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2
Q

Pressure may be defined as -

A. Mass per unit area
B. Force per unit area
C. Mass per unit volume
D. Force per unit volume

A

B. Force per unit area

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3
Q

The QNH altimeter setting is the -

A. Height above mean sea level, expressed in hectopascals
B. Atmospheric pressure exerted on a particular area
C. Subscale setting at which the altimeter indicates airfield elevation on landing
D. Subscale setting at which the altimeter indicates pressure height

A

C. Subscale setting at which the altimeter indicates airfield elevation on landing

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4
Q

Relative humidity is -

A. The percentage degree of saturation
B. The ratio of the amount of water vapour to the amount of air in which it is contained
C. The ratio of the mass of water vapour to the mass of dry air in which it is held
D. Unaffected by changes of temperature

A

A. The percentage degree of saturation

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5
Q

Relative humidity is measured by using a -

A. Hydrometer
B. Barometer
C. Altimeter
D. Psychrometer

A

D. Psychrometer

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6
Q

The water vapour held in saturated air is -

A. Visible sometimes
B. Visible if the temperature is low enough
C. Visible always
D. Invisible always

A

D. Invisible always

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7
Q

Warm air rising adiabatically above a ploughed field, surface temp +21c. The dew point at the cloud base is +3c

The cloud base and freezing level respectively are approximately-

A. 7500ft & 9500ft
B. 9000ft & 11000ft
C. 9000ft & 10500ft
D. 6000ft & 8000ft

A

D. 6000ft & 8000ft

21 - 3 = 18
18/3(DALR) = 6/6000

3c to 0c (freezing level) = 3

3/1.5(SALR) = 2/2000 + 6000 = 8000

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8
Q

If the ELR is between 1.5c and 3c the air is -

A. Stable
B. Unstable
C. Neutrally stable
D. Stable for dry air and unstable for saturated air

A

D. Stable for dry air and unstable for saturated air

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9
Q

When the ELR is greater than the DALR, dry air is -

A. Stable
B. Unstable
C. Conditionally unstable
D. Conditionally stable

A

B. Unstable

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10
Q

When the SALR is greater than the ELR, saturated air is -

A. Stable
B. Unstable
C. Conditionally unstable
D. Conditionally stable

A

A. Stable

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11
Q

Warm air rising adiabatically above a ploughed field, surface temp +21c. The dew point at the cloud base is +3c. Allowing for the dew point lapse rate, the cloud base and freezing respectively are approximately -

A. 7500ft & 7000ft
B. 9000ft & 11000ft
C. 9000ft & 10500ft
D. 6000ft & 8000ft

A

A. 7500ft & 7000ft

21 - 3 / 2.4 = 7.5 (7500ft)

21 / 3 (DALR) = 7 (7000ft)

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12
Q

If you stand with your back to the wind in the Southern Hemisphere, the region of low pressure will be -

A. On your right
B. On your left
C. Directly behind you
D. Directly ahead of you

A

A. On your right

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13
Q

Following the passage of a warm front, the most likely weather scenario would be -

A. Nil significant weather
B. Heavy continuous rain
C. Scattered showers
D. Thunderstorms

A

A. Nil significant weather

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14
Q

If the air is unstable in the lower layers only, the following conditions could be expected -

A. Bumpy with cumulus cloud
B. Continuous rain and smooth flying conditions
C. Poor visibility with layer cloud
D. Bumpy with stratiform cloud

A

A. Bumpy with cumulus cloud

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15
Q

At which latitude would there be the greatest difference between the actual wind and gradient wind at 5000ft AGL -

A. 15 degrees S
B. 5 degrees S
C. 35 degrees S
D. 25 degrees S

A

B. 5 degrees S

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16
Q

Surface friction causes -

A. Increased cross-isobar flow
B. A decrease in speed of a low jet
C. A decrease in Coriolis effect
D. A decrease in the gradient wind

A

C. A decrease in Coriolis effect

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17
Q

Which of the following cloud types is most likely to produce virga -

A. Nimbostratus
B. Thin stratus
C. Cirrostratus
D. Thin altostratus

A

D. Thin altostratus

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18
Q

A thunderstorm can occur well after a cold front has passed because -

A. The cloud tops grow when they penetrate the warmer air above
B. Convergence of the air causes lifting
C. The surface over which the cold air is passing is warmer than the cold air mass
D. The cold air behind the front is ascending

A

C. The surface over which the cold air is passing is warmer than the cold air mass

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19
Q

Advection fog forms when -

A. Cold air passes over a warm surface
B. Cold air passes over a cold surface
C. Warm air passes over a cold surface
D. Warm air passes over a warm surface

A

C. Warm air passes over a cold surface

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20
Q

Two hazards posed to aircraft around a thunderstorm could be -

A. Icing and hail
B. Icing and turbulence
C. Turbulence and hail
D. Lightning and hail

A

C. Icing and hail

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21
Q

When avoiding a thunderstorm, horizontal separation should be at least -

A. 1nm
B. 2nm
C. 5nm
D. 20nm

A

D. 20nm

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22
Q

Clear icing in Australia is normally associated with the following clouds -

A. Large cumulus, cumulonimbus, nimbostratus
B. Altostratus, large cumulus, cumulonimbus
C. Cumulonimbus, nimbostratus, stratocumulus
D. Cumulonimbus, nimbostratus, altostratus

A

A. Large cumulus, cumulonimbus, nimbostratus

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23
Q

During the mature stage of a tropical cyclone the central surface pressure -

A. Remains constant
B. Falls rapidly
C. Begins to rise
D. Increases the pressure gradient

A

A. Remains constant

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24
Q

In which cloud type is clear ice most likely in flight above the freezing level -

A. Cumulus
B. Nimbostratus
C. Altostratus
D. Altocumulus

A

B. Nimbostratus

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25
Q

Strong horizontal wind shear can be encountered -

A. Within a thunderstorm cell
B. Above a strong surface inversion
C. In cirrus cloud
D. Near a low pressure system

A

B. Above a strong surface inversion

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26
Q

The onset of light wind beneath a radiation inversion will cause the inversion to become -

A. Stronger and deeper
B. Stronger but more shallow
C. Weaker but deeper
D. Weaker and more shallow

A

C. Weaker but deeper

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27
Q

There is little vertical development in cloud within the South East trades because of -

A. An absence of condensation nuclei
B. An absence of water vapour
C. The pressure of the trade wind inversion
D. The fact warmer air can hold more water vapour

A

C. The pressure of the trade wind inversion

28
Q

Meteorological visibility refers to -

A. Visibility for landing
B. Visibility along a runway
C. The least visibility prevailing over the entire horizon
D. The greatest visibility prevailing over half or more of the horizon

A

D. The greatest visibility prevailing over half or more of the horizon

29
Q

The conditions most favourable for the formation of sea fog are -

A. Air flow from an area of warm water to an area of cold water
B. Air flow from a warm land mass to an area of cold water
C. Air flow from an area of warm water to a cold land mass
D. A calm clear night at sea

A

A. Air flow from an area of warm water to an area of cold water

30
Q

The conditions which would be most favourable for the formation of a low level jet across southern Queensland are -

A. Late afternoon, clear sky, a HIGH centred to the east of the GDR.
B. Late evening, high overcast, a LOW centred to the east of the GDR
C. Early morning, clear sky, a HIGH centred to the west of the GDR
D. Midday, TCU beginning to develop, a LOW centred to the east of the GDR

A

C. Early morning, clear sky, a HIGH centred to the west of the GDR

31
Q

During a an approach you experience sudden difficulty maintaining desired G/S and you need to use unusually large variations of power.
The type of wind shear experienced would be described as

AIP GEN 3.5 - 31

A. Light
B. Moderate
C. Strong
D. Sever

A

C. Strong

32
Q

A strong convergence zone within the Equatorial Trough would probably lead to -

A. Fine weather with scattered cloud
B. Both frequent thunderstorms and steady rain
C. Widespread steady rain but thunderstorms would be unlikely
D. Frequent storms, but steady rain would not be present

A

B. Both frequent thunderstorms and steady rain

33
Q

Tropical thunderstorms occurring in the hours just before dawn are most likely to form -

A. Over the sea
B. Over coastal land areas with a tendency to move seawards
C. Over coastal waters with a tendency to move over land
D. Inland in subcontinental areas

A

A. Over the sea

34
Q

The type of thunderstorms generally regarded as having the most severe turbulence are -

A. Shear
B. Tropical
C. Cold stream
D. Nocturnal equatorial

A

A. Shear

35
Q

Visibility, as reported in a METAR in the Australian region, refers to -

A. Visibility along the runway
B. Visibility along the landing approach path
C. The greatest visibility over half or more of the horizon
D. The minimum visibility over half or more of the horizon
E. The average visibility over the whole horizon

A

D. The minimum visibility over half or more of the horizon

36
Q

The term which best describes an accumulation of airframe icing which may be sufficient to make a change in altitude ESSENTIAL is -

A. No sig icing
B. Light icing
C. Moderate icing
D. Severe icing

A

D. Severe icing

37
Q

The most likely situation for the occurrence of radiation fog is -

A. Depression with no cloud cover
B. A col with high level cloud cover
C. A trough with no cloud cover
D. An anticyclone with no cloud cover

A

D. An anticyclone with no cloud cover

38
Q

Lenticular clouds are likely to indicate the presence of -

A. Mountain waves
B. Rotor turbulence
C. Icing conditions
D. A jet stream

A

A. Mountain waves

39
Q

In January the subtropical jet stream is likely to be located -

A. Near latitude 10S
B. Near latitude 20S
C. Near latitude 30S
D. Near latitude 45S

A

C. Near latitude 30S

40
Q

You are approaching a westerly jet stream when flying south across Australia at FL390. The temperature is steadily decreasing.
You would expect to pass -

A. Through the jet core
B. Below the jet core
C. Above the jet core
D. Any of the above depending on the height of the jet core

A

B. Below the jet core

41
Q

The rate at which atmospheric pressure decreases with altitude in a column of air -

A. Is constant, regardless of temperature
B. Decreases and is dependent on the mean temperature of the column
C. Decreases and is not affected by the mean temperature of the column
D. Increases and depends on the mean temperature of the column

A

B. Decreases and is dependent on the mean temperature of the column

42
Q

The correction applied to station level pressure to obtain the QNH assumes -

A. The density of a column of air extending down to MSL in independent of temperature at station
B. The density height measured at the station is greater than the pressure height
C. The density of a column of air extending down to MSL is dependent on the temperature at the station
D. The density height measured at the station is less than the pressure height

A

A. The density of a column of air extending down to MSL in independent of temperature at station

43
Q

With the passage of a cold front in the southern hemisphere -

A. The wind veers, the temperature falls and the pressure falls
B. The wind backs, the temperature and the pressure falls more rapidly
C. The wind backs, the temperature falls and the pressure rises
D. The wind veers, the temperature falls and the pressure rises

A

C. The wind backs, the temperature falls and the pressure rises

44
Q

Frontal thunderstorms would be triggered -

A. By the passage of a warm front
B. By the passage of a cold front
C. Along a well formed trough of low pressure
D. Along a well formed ridge of high pressure

A

B. By the passage of a cold front

45
Q

The ITCZ is found near

A. The North Pole
B. The South Pole
C. The equator
D. Varies from the poles to the equator as the seasons change

A

C. The equator

46
Q

The major hazard of a tropical cyclone to an aircraft is

A. Destructive winds
B. Cloud and precipitation
C. Unreliable altimeter
D. Severe turbulence

A

D. Severe turbulence

47
Q

If the air is unstable in the lower layers only, the following conditions could be expected

A. Bumpy with cumulus cloud
B. Continuous rain with poor vis
C. Poor vis with layer cloud
D. Bumpy with stratiform cloud

A

A. Bumpy with cumulus cloud

48
Q

Cold streams passing over SE Aus are usually unstable because -

A. The surface over which they pass is colder than the air
B. The surface over which they pass is warmer than the air
C. As the stream moves northwards, the air in the upper troposphere becomes warmer and the stability decreases
D. The sea breeze reinforces the southerly stream, making the air in the lower troposphere colder and increasing the lapse rate

A

B. The surface over which they pass is warmer than the air

49
Q

At which latitude would there be the greatest difference between actual wind and gradient at 5000fT AGL -

A. 15deg S
B. 5deg S
C. 35deg S
D. 25deg S

A

B. 5deg S

50
Q

Surface friction causes -

A. Increased cross-isobar flow
B. Decrease in speed of a low jet
C. Decrease in Coriolis effect
D. Decrease in gradient wind

A

C. Decrease in Coriolis effect

51
Q

Which of the following cloud is most likely to produce virga -

A. Nimbostratus
B. Thin stratus
C. Cirrostratus
D. Thin altostratus

A

D. Thin altostratus

52
Q

A thunderstorm can occur well after a cold front has passed because -

A. The cloud tops grow when they penetrate the warmer air above
B. Convergence of air causes lifting
C. The surface over which the cold air is passing is warmer than the cold air mass
D. The cold air behind the front is ascending

A

C. The surface over which the cold air is passing is warmer than the cold air mass

53
Q

The minimum OAT at which clear ice would be unlikely is -

A. 0C
B. -25C
C. 5C
D. 10C

A

C. 5C

54
Q

The type of icing likely to be encountered in an orographic cloud when OAT is -10C would be -

A. Clear ice
B. Rime ice
C. Carburettor ice
D. Impact ice

A

A. Clear ice

55
Q

Flight in stratocumulus cloud at a temperature range of -1 to -5C would likely encounter

A. Clear ice
B. Virga
C. Continuous rain
D. Rime ice

A

D. Rime ice

56
Q

In which cloud is clear ice most likely encountered

A. Cu
B. Ns
C. As
D. Ac

A

B. Ns

57
Q

The set of conditions most likely to produce mountain wave activity are

A. Wind direction parallel to ride
B. 15kt wind at top of ridge
C. Wine speed decreasing with increased height
D. A stable layer of air near top of ridge

A

D. A stable layer of air near top of ridge

58
Q

A strong horizontal wind shear can be encountered

A. Within a thunderstorm
B. Above a strong surface inversion
C. In cirrus cloud
D. Near a low pressure system

A

B. Above a strong surface inversion

59
Q

The onset of light wind beneath a radiation inversion will cause the inversion to become -

A. Stronger and deeper
B. Stronger but more shallow
C. Weaker but deeper
D. Weaker but more shallow

A

C. Weaker but deeper

60
Q

There is little vertical development in cloud within the southeast trades because of -

A. An absence of condensation nuclei
B. An absence of water vapour
C. The pressure of the trade wind inversion
D. The fact warmer air can hold more water vapour

A

C. The pressure of the trade wind inversion

61
Q

The pressure system which gives rise to subsidence inversions is -

A. Cyclone
B. Anticyclone
C. Col
D. Trough

A

B. Anticyclone

62
Q

The extent of coverage for a TAF is

A. 5nm from centre of airfield
B. 5km from centre of airfield
C. 10nm from centre of airfield
D. 10km from centre of airfield

A

A. 5nm from centre of airfield

63
Q

The difference between front and airmass thunderstorms are -

A. Air mass storms are more widely spaced than frontal storms and have lower bases
B. Strong downdraughts are more likely beneath frontal storms
C. An individual frontal storm is likely to be less severe than an airmass storm
D. Hail is more likely to be encountered in an airmass storm than a frontal storm

A

B. Strong downdraughts are more likely beneath frontal storms

64
Q

The conditions most favourable for the formation of sea fog are -

A. Air flow from an area of warm water to an area of cold water
B. Air flow from a warm land mass to an area of cold water
C. Air flow from an area of warm water to a cold land mass
D. A calm clear night at sea

A

A. Air flow from an area of warm water to an area of cold water

65
Q

The conditions which would be most favourable to the formation of a low level jet across southern Queensland are -

A. Late afternoon, clear sky, a HIGH centred to the east of the GDR
B. Late evening, high overcast l, a LOW centred to the East of the GDR
C. Early morning, clear sky, a HIGH centred to the WEST of the GDR
D. Midday, towering cumulus developing, a LOW centred to the East of the GDR

A

C. Early morning, clear sky, a HIGH centred to the WEST of the GDR

66
Q

A situation where the environment temperature increases with height is said to be -

A. Stable
B. Unstable
C. Neautral
D. Conditionally stable
E. Conditionally unstable

A

A. Stable

67
Q

Visibility, reported in a METAR refers to -

A. Vis along a runway
B. Vis along the landing approach path
C. The greatest vis over half or more of the horizon
D. The minimum vis over half or more of the horizon
E. The average vis over the whole horizon

A

D. The minimum vis over half or more of the horizon

ATPL Meteorology (14 decks)

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