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CPL - Meteorology > Met - Practice Exam Questions > Flashcards

Met - Practice Exam Questions Flashcards

1
Q

The effect of hoar frost forming on the wings of an aeroplane is -

A

Hazardous, because it can substantially increase stalling speed

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2
Q

One of the prerequisites for the formation of a thunderstorm is -

A

the presence of moist air through a considerable depth of the atmosphere

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3
Q

A strong pressure gradient is normally associated with -

A

An area of strong winds

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3
Q

Advection fog differs from radiation fog in that -

A

it can form at any time of day and may persist for long periods

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4
Q

Area forecasts for flights below 20 000 ft are available -

A

on request from Air Services Australia or MET office

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5
Q

The recommended speed for flight in turbulent conditions is -

A

A speed, which gives a compromise between excessive structural loads and the stall

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5
Q

During cruise you suspect that carburettor ice forming and apply full carburettor heat. The engine immediately loses power and begins to run roughly. Your immediate action should be -

A

Leave carburettor heat full ON

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5
Q

a condition which is most likely to produce mountain wave activity -

A

a stable layer of air near the height of the ridge

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6
Q

Select a phenomenon which is most likely to be associated with cirrostratus cloud -

A

the halo effect

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6
Q

The most likely cause of turbulence over land on a hot day is -

A

thermal activity

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7
Q

The initial effect of accumulating clear ice on an aeroplane in flight will be -

A

An increase in stalling speed

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8
Q

A wind blowing up sloping terrain during the day could be -

A

anabatic

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9
Q

an indication which would be associated with a sudden decrease in headwind component during an approach to land -

A

A decrease in indicated airspeed and an increase in rate of descent

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9
Q

The validity period of a TTF is -

A

3 hr from the time of the report with which it is associated

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9
Q

A TAF is a statement of the conditions expected for a specified period in the air space within -

A

5 nm of the centre of an aerodrome

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10
Q

A hazard that dust storms are most likely to produce is -

A

severe visibility restriction over a widespread area to heights above 10000 ft

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11
Q

When air temperature increases with height through a layer of the atmosphere, the probability of vertical motion is -

A

Low as rising air becomes cooler than its surroundings

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11
Q

The flying conditions above a layer of small cumulus clouds are likely to be -

A

Smooth

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12
Q

A sudden increase in head wind component during an approach to land will, with altitude and power constant, cause the airspeed to -

A

Increase and then return to normal

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12
Q

The pressure system which gives rise to a subsidence inversion is -

A

anticyclone

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13
Q

The strength of the pressure gradient force depends most on -

A

The spacing of the isobars

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13
Q

You would expect calm conditions at an aerodrome in the morning to persist for a longer period if -

A

Skies are overcast with stratus cloud

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13
Q

the cloud type which is most often associated with mountain wave activity -

A

altocumulus lenticularis [lenticular]

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14
Q

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

A

5 degrees S

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15
Q

In an area of towering cumulus clouds, select a location, relative to the clouds, in which the least amount of turbulence is usually found -

A

Between the clouds

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15
Q

An aerodrome weather report is designated as SPECI when -

A

the weather conditions are fluctuating about or are below specified criteria

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16
Q

The type of precipitation from stratus is most likely to be -

A

Drizzle

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17
Q

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

A

the surface over which the cold air is passing is increasingly warmer than the cold air mass

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19
Q

The layer of the atmosphere in which most convection takes place is -

A

the troposphere

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20
Q

A thunderstorm is active approximately 10 km from an aerodrome. A hazard for which a pilot approaching to land at the aerodrome should be on the alert is -

A

Severe low-level wind shear

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21
Q

Strong horizontal wind shear can be encountered -

A

above a strong surface inversion

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21
Q

A METAR is issued routinely -

A

Every hour or half hour

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22
Q

The datum used to express wind direction in a TAF and ARFOR respectively, is -

A

True north in both messages

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23
Q

If the only cloud along a route is overcast cirrostratus, a pilot should encounter -

A

No precipitation

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24
Q

When the Coriolis force is exactly balanced by the pressure gradient force, the resulting wind is called -

A

geostrophic

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25
Q

Hoar frost would be most likely to form on an aircraft overnight -

A

in calm conditions and relatively humid air

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26
Q

The location in the vicinity of mountain waves where the rotor zone located -

A

under lenticular clouds

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27
Q

As height is decreased during a descent to land in a strong crosswind from the right, the crosswind component is likely to -

A

increase

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28
Q

The major hazard to a landing aircraft associated with a microburst is -

A

Wind shear and downdraft

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29
Q

Compared to the gradient wind, the surface wind direction in the southern hemisphere is found to be -

A

further to the right in both highs and lows

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30
Q

A SIGMET contains advice of severe meteorological conditions -

A

within a specified area

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31
Q

One hazard that can be indicated by the presence of virga is -

A

micro burst activity

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32
Q

In summer over tropical inland regions, at what time of day can thunderstorm activity normally be expected to commence -

A

In the afternoon

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33
Q

The hazard to flight most likely to occur in the rotor zone associated with mountain waves is -

A

Severe turbulence

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35
Q

The area in which a tropical cyclone is most likely to form is -

A

over the Pacific ocean at about 15 degrees S

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35
Q

Squall lines are most often associated with -

A

Thunderstorms

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35
Q

You are planning a VFR flight by day proceeding 80 nm from the departure aerodrome. The maximum permitted crosswind component in an aeroplane’s flight manual is 20 kt. Select a weather condition forecast for the destination at the ETA which would necessitate the provision of an alternate

A

30 percent probability of visibility restricted to 7 km

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36
Q

Slant visibility in fog causes -

A

the runway is visible from ‘over the top’ but not in the circuit area or on final

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37
Q

If the ETA at the destination falls within the forecast periods of that aerodrome’s TAF with the following conditions, select a condition which would ALWAYS require you to nominate an alternate -

A

PROVISIONAL

38
Q

The most likely hazard to be encountered when flying in the vicinity of an active squall line is -

A

severe turbulence

39
Q

The onset of a light wind during the formation of a radiation inversion will cause the inversion to -

A

Increase in depth

40
Q

Anti-clockwise flow occurs

A

about a high in the southern hemisphere

40
Q

A katabatic wind tend to reinforce -

A

a land breeze

40
Q

An aeroplane takes off in calm conditions and climbs through a wind shear where it encounters a strong tail wind. The initial effect this change in wind velocity will have on IAS and the flight path is -

A

IAS will decrease; flight path will be shallower

42
Q

A cloud type which is produced by turbulence within the surface layers of the atmosphere -

A

stratocumulus

43
Q

One of the prerequisites for the formation of a thunderstorm is -

A

a conditionally stable atmosphere

44
Q

The cloud type which is responsible for the halo phenomena is -

A

cirrostratus

44
Q

Hoar frost which has formed on an aircraft parked in the open overnight -

A

May seriously affect performance and should always be removed before flight

46
Q

One effect of surface friction upon airflow near the earth’s surface is to -

A

Increase cross-isobar wind flow

48
Q

The pressure gradient force acts -

A

at right angles to the isobars towards the lower pressure

49
Q

After take-off, the effect on airspeed if you encounter a wind shear where the headwind component increases is -

A

An increase in airspeed and then it returns to normal

51
Q

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

A

weaker but deeper

52
Q

One condition associated with the term CAVOK in a TAF is that -

A

Visibility is 10 km or greater

54
Q

A statement which best describes a backing wind -

A

it is changing direction anti-clockwise

56
Q

There is very little convection within the stratosphere because -

A

the air at the top of the layer is warmer than the air at the bottom

58
Q

The most common method of cloud formation is -

A

cooling of air by expansion until saturation occurs

60
Q

the accumulation of ice on the blades of a propeller during flight will cause …..

A

Thrust will be reduced and vibrations are likely if ice accumulates

61
Q

The temperature at the base of a stratocumulus cloud is -1 degrees C. The cloud is 2500 ft thick and the temperature at the cloud top is -5 degrees C. Flight through this cloud is likely to encounter -

A

rime ice

62
Q

a cloud type in which clear ice most likely during flight above the freezing level -

A

nimbostratus

63
Q

the weather situation which would be most likely after the passage of a warm front in the southern hemisphere -

A

nil

64
Q

a process which is involved in the formation of hoar frost -

A

deposition of ice directly from the water vapour mixed with the air

66
Q

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

A

remains constant

67
Q

The condition most likely to produce advection fog is -

A

warm air passing over a cold surface

68
Q

Thunderstorms associated with a cold front may be potentially more hazardous to aircraft than air mass thunderstorms because -

A

There may be numerous storms along the frontal line with little separation between cells

69
Q

An approaching fast moving cold front may sometimes be recognised by the accompanying

A

A line of towering cumulus cloud, thunderstorms and rainshowers

69
Q

Low level jet streams can be hazardous because they produce -

A

strong horizontal wind shear near the surface

70
Q

The Coriolis effect explains the tendency of wind to -

A

turn left in the southern hemisphere

71
Q

The term NOSIG indicates -

A

the weather described in the METAR is expected to remain unchanged for the next 3 hours

72
Q

For a katabatic wind to form there must be -

A

a surface inversion

73
Q

describes a squall line -

A

a low cloud moving rapidly in the warm air ahead of a cold front

73
Q

The condition most likely to produce an advection fog is -

A

A warm airmass passing over a relatively cold surface

74
Q

Variations in wind and temperature that normally occur with the passage of a cold front are -

A

the wind backs and temperature falls

74
Q

The flying conditions most likely over land in a sea breeze are -

A

Moderate turbulence in clear air

75
Q

A pilot is planning a private flight which passes over a bay in a single-engine aircraft. The total distance for the flight is less than 50 nm and the aircraft will be beyond gliding distance from land over part of the route. Select a statement which is correct regarding the planning requirements for this flight -

A

A weather forecast is required

77
Q

The most rapid build up of clear airframe ice would occur during flight through -

A

Freezing rain

78
Q

The cloud type with which low ceilings and reduced surface visibility is most likely to be associated is -

A

Nimbostratus

79
Q

A fohn wind is likely to result in -

A

a lower humidity in the lee of the mountain at low level

81
Q

The cloud type with which virga is most often associated is -

A

altocumulus

83
Q

When must a meteorological forecast be obtained for a flight in an aircraft with a maximum take-off weight not exceeding 5700 kg? A forecast must be obtained when the flight is -

A

Away from the vicinity of an aerodrome

85
Q

a hazard which may be present during the cumulus [the developing] stage of a thunderstorm -

A

Severe airframe icing

86
Q

The temperature range in which rime icing is most likely to occur is -

A

-10 degrees C to -20 degrees C

87
Q

A VOLMET is a broadcast of selected meteorological information which is made -

A

on a routine basis on HF for specified aerodromes

88
Q

The most dangerous effect of a mature thunderstorm is -

A

turbulence

89
Q

There is little vertical development of cloud within the south east trade winds because of -

A

the presence of the trade wind inversion

90
Q

An AIRMET differs from a SIGMET in that -

A

it contains advice of meteorological conditions below 10,000 feet only

92
Q

The equatorial trough features extensive cloud and weather because -

A

it is a region where converging airstreams rise over warm ocean due to the intensity of solar radiation

93
Q

A radiation fog can deepen with small increase in the wind strength because -

A

Cold air near the ground is mixed to greater depth

94
Q

Wind information given in aerodrome forecasts indicates the direction -

A

From which the wind is blowing in degrees true

95
Q

The cloud type most likely to be associated with heavy continuous rain is -

A

Nimbostratus

96
Q

The belt of high pressure that appears over the Australian continent during the winter months is called

A

the sub-tropical ridge

97
Q

The equatorial trough moves further north than it does south because -

A

the mid-summer surface temperatures are higher at any given latitude in the northern hemisphere because of the greater land mass

98
Q

A situation in the atmosphere where the environmental temperature increases with height is said to be -

A

Stable

99
Q

The term geostrophic wind refers to the steady flow of wind -

A

along straight isobars

101
Q

Comparing the visibility and turbulence above and below a subsidence inversion it is found that -

A

visibility is greater and turbulence is less above the inversion

103
Q

A pilot is landing at a coastal aerodrome orientated east-west, with the sea to the South, on a hot summer afternoon. The most likely wind direction at the aerodrome would be -

A

Southerly

105
Q

The equatorial trough moves further north than it does south because -

A

the mid-summer surface temperatures are higher at any given latitude in the northern hemisphere because of the greater land mass

106
Q

a hazard which is normally associated with mountain waves -

A

Turbulence

107
Q

Cloud height in METAR and TAF message refers to he height above -

A

The aerodrome reference point

108
Q

The TAF service provided for a domestic aerodrome with more than 40,000 movements per year and a control tower is -

A

issued 6 hourly and valid for 12, 18 or 24 hr

109
Q

a set of instrument indications which would indicate a sudden decrease in headwind component during a descent -

A

A decrease in indicated airspeed and an increase in rate of descent

110
Q

The most rapid build-up of clear airframe ice would occur during flight through -

A

freezing rain

111
Q

Vertical movement within the atmosphere becomes less vigorous above the height of the tropopause because -

A

the environment no longer gets colder with increased height

112
Q

the temperature range in which clear airframe ice is likely to be most severe -

A

0 degrees C to -15 degrees C

113
Q

The type of weather associated with monsoonal airflow in summer in Northern Australia would be -

A

Widespread thunderstorm activity and heavy rain

114
Q

The term INTER 0103/0109, as used in a TAF means that -

A

There will be intermittent changes to the prevailing conditions between 0300 UTC and 0900 UTC on the first.

115
Q

Conditional stability exists when -

A

Saturated air is unstable but unsaturated air is stable

117
Q

In an area of towering cumulus clouds, the location in which the least amount of turbulence is likely to be found is -

A

Between the clouds

118
Q

The situation in which clear icing is most likely is -

A

after leaving the freezing level on climb in nimbo stratus cloud

119
Q

The global winds that blow from the sub-tropical ridge to the equatorial trough in the southern hemisphere are called -

A

the south east trade winds

120
Q

For flights where a forecast is required, during which of the following periods, in relation to your ETA, must the TAF for your destination be valid -

A

At least 30 min before to at least 60 min after

121
Q

Surface wind, when compared to gradient wind flow, is found to be -

A

veered to the right and slower

CPL - Meteorology (11 decks)

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