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WorksheetsATPL Met Exam Prep
Total questions: 75
Worksheet time: 30secs
What does surface air do in an anticyclone?
Convergence
Divergence
How does weather radar measure the horizontal movement of a storm?
Time lapse between different charts
Doppler measures change in thickness
Where are typhoons most likely to be forecasted?
Northwest Pacific Ocean
Southwest Indian Ocean
North Atlantic Ocean
Eastern Pacific Ocean
Who is responsible for world forecasts?
IWOCA
WAFS
IWAF
WWO
What are the four stages of a tropical cyclone
Formation, immature, fully mature, decaying
Tropical disturbance, tropical depression, tropical storm, cyclone
Dry bulb is 16°C and wet bulb is 10°C with a dew point of 6°C. What is the relative humidity?
50 percent
55 percent
40 percent
60 percent
What is the average temperature lapse rate and stability of air between FL310 and FL390 for ROFOR 160E?
0.5°C Stable
2°C Conditionally stable
2.8°C Very Stable
3.6°C Unstable
What is the height of the tropopause above Italy?
FL270
FL350
FL400
FL300
Which are the type of clouds associated with a Jetstream?
Cirrus, Cirrocumulus, Cirrostratus
Cumulus, stratus
Cirrus, Mammatus, Castellanies
Nimbostratus, Cumulonimbus
What kind of stability does SCWD have?
Stable
Unstable
Conditionally stable
Very stable
Within the Cyclone eye:
Air subsides, winds are calm, and sky is clear
Air subsides, winds are strong, and sky is clear
Air rises, winds are calm, and sky is clear
Air rises, winds are strong, and sky is clear
Where do thunderstorms get their energy from?
Vapour condensing and absorbing latent heat increasing instability
Vapour condensing and releasing latent heat increasing instability
Vapour condensing and releasing latent heat increasing stability
Moisture changing to vapour which releases latent heat increasing instability.
What is the height of the polar jet stream?
300hpa level to 500hpa level
600hpa level
It varies too much to have one set level
500hpa level to 700hpa level
The temperature of surface and the tropopause change in height:
Decreases at the poles
Increases and decreases temperature
Decreases and increases with temperature
Decreases and temperature stays the same
What is the average height the 500hpa flight level is found?
10,000ft
18,000ft
30,000ft
34,000ft
How long is a SIGMET for volcanic ash valid for?
2 hours
4 hours
6 hours
8 hours
What is the maximum wind speed on this chart?
140kts
120kts
100kts
170kts
How does a pilot identify CAT?
Change in temperature, wind and drift is present. Conventional radar cannot detect turbulence
Change in temperature, wind and with radar
No temperature change however wind and drift will increase
With the presence of Cumulus cloud
Which way does the wind flow relative to streamlines?
Same direction/parallel as the streamline
At right angles to the streamline
Across the isobars
In the opposite direction to the streamline
The horizontal movement of air at the 700hpa level which moves warm air poleward and cold air equatorward is?
Long waves
ITCZ
Anticyclone
Jetstream
ISA considers that (Select all that are true)
Temperature lapse rate of 2 degrees per 1000ft at all altitudes
Air is dry and its composition is the same at all altitudes
Temperature at sea level is 15 degrees
Above 36,090ft the temperature is considered isothermal
Characteristics of the stratosphere (Select all the are true)
Air is stable
Air is isothermal
Usually devoid of cloud
Is where the ozone is
The reason for the poles being colder than the equator is?
The sun strikes the poles at a lower angle
The poles are slightly further away from the sun
The seasonal changes
The jet streams
What causes some solar radiation to be reflected back out into space?
CO2
Clouds
Ozone
Solar particles
8000ft mountain range. Temperature on windward side is 16°C and dew point on windward side is at 2000ft while its 6000ft on the lee of the mountain.
What is the temperature at the base of the mountain on the leeward side?
10°C
18°C
22°C
8°C
8000ft mountain range. Temperature on windward side is 16°C and dew point on windward side is at 2000ft while its 6000ft on the lee of the mountain.
What is the dew point temperature on the windward side of the mountain?
10°C
0°C
13°C
8°C
Wind shear vorticity
Is always cyclonic
Is always anticyclonic
Is increased when fast air moves around slow air
Is increased when slow air moves around fast air
In southern hemisphere subtropical latitudes with warm anticyclones they _______ with height which cause upper air pressure to be ______ to the north and _______ to the south
Intensify, higher, lower
Weakens, higher, lower
Weakens, lower, higher
Intensify, lower, higher
The effect of friction on the surface wind in the southern hemisphere?
Flows parallel with the isobars
Veers to the isobars
Moves over isobars at right angles
Reverses direction on the isobars
In the southern hemisphere wind:
Backs and increases during the day and veers and decreases at night
Veers and increases during the day and backs and decreases at night
Backs and decreases during the day and veers and increases at night
Veers and decreases during the day and backs and increases at night
Freezing rain is most common?
In polar maritime climates by both warm and cold fronts
In polar continental climates by both warm and cold fronts
In polar continental climates with warm fronts
In Polar maritime climates with cold fronts
What kind of air mass has large temperature difference throughout the year with moderate precipitation, most of which occurs in summer and of which a small portion falls as snow?
Temperate mountains
Polar
Continental
Savanna
Tropical maritime air moving NW of NZ causing NE wind in bay of plenty. What will the weather be like in BOP?
Low cloud with drizzle humid
Fine until the depression arrives
Clear skies with light winds humid
Thunderstorms
A deepening depression:
Has surface convergence and a small amount of convergence at upper levels
Lower level convergence, widespread cloud releasing latent heat “fueling” the depression
Lower level convergence, rising air and greater upper level divergence
What is a Jetstream?
A strong narrow current in the upper troposphere, with strong vertical and horizontal windshear with one or more wind maxima. Wind strength must be greater than 60kts
A strong wide current in the upper troposphere, with strong vertical and horizontal windshear with one or more wind maxima. Wind strength must be greater than 60kts
A strong narrow current in the stratosphere, with strong horizontal windshear with one or more wind maxima. Wind strength must be greater than 80kts
Dry weather in northern Australia occurs during;
Summer in the dry monsoon
NE Tradewinds
SE Tradewinds
SW Tradewinds
A slightly lower pressure in the western pacific <4hpa relative to the eastern pacific represents?
A strongly positive ENSO index also know as La Nina
A strongly negative ENSO index also know as El Nino
A neutral or normal ENSO index
A fluctuating index
What will cause an increase in tropical cyclones for northern Australia?
Positive ENSO index
Negative ENSO index
SW Tradewinds
Winter
Why is visual satellite imagery easier to identify the extent of fog vs infrared imagery?
Visual imagery shows clouds as black and fog as white
Infrared cannot easily differentiate between the surface temperature of the ocean and fog
Infrared cannot easily show the vertical extent of cloud
What of the following factors hinder the escape of terrestrial radiation?
Incoming solar radiation
Water vapour
CO2 and Ozone
CO2 and Argon
The temperature of the stratosphere:
Is isothermal
Slightly increases with height or is isothermal
Slightly decrease with height
Varies too much to make an accurate assumption
Ultraviolet radiation is absorbed by ______and visible light is absorbed by _______
Ozone, water vapour
O3, CO2
CO2, water vapour
Thermosphere, water vapour
What is the wavelength of solar radiation?
80 μ
40 μ
20 μ
1 μ
Which area represents behind the cold front?
A
B
C
D
You are at FL330 and the Temperature is -56°C, what is the ISA deviation?
ISA -5°C
ISA +5°C
ISA +4°C
ISA -4°C
Select the true statement for the operation of infrared and satellite imagery by day and night:
Satellite imagery cannot be used at night, infrared can be used at night
Satellite imagery and infrared can be used both day and night
Satellite imagery is only valid between latitudes 20°N/S to 85°N/S due to orbital errors at night, infrared can be used day or night
In what region does the maximum convergence and convection occur in regards to the equatorial trough?
15°N 10°S
20°N 15°S
25°N 20°S
30°N 25°S
Icing in a lenticular cloud will be?
Severe
Moderate
Not present
Occasional rime icing
What are the characteristics of the formative stage of a tropical cyclone?
Pressure decrease getting close to 1000hpa and gale force winds are present in at least one quadrant
Pressure below 1000hpa and gale force winds are present in at least one quadrant
Pressure decrease getting close to 1000hpa and hurricane force winds are present in at least one quadrant
Pressure below 1000hpa and hurricane force winds are present in at least one quadrant
What is the chart predicting?
Cyclone will move NW
Cyclone wind speeds are 94kts
The cyclone is dissipating
Cyclone will move NE
Given equally spaced isobars, wind speed is usually
The same around a high and low pressure system
Higher around a high-pressure system
Higher around a low-pressure system
What is the rate of ice accretion in a lenticular cloud?
Rapid because the cloud is in predominantly icing conditions
Rapid because they form near snow covered mountains
Slow because they are only associated with fair weather
Slow because they are below freezing level
What is the height of the sub tropical jet stream?
10,000ft-12,000ft
12,000ft-18,000ft
30,000ft-50,000ft
50,000ft-tropopause
If the temperature is 29 degrees and the grams per cubic metre is 19g/m3 what is the relative humidity?
70%
90%
50%
30%
A wind flowing from the eastern pacific to the western pacific is caused by what cell?
Ferrel Cell
Hadley Cell
Polar Cell
Walker Cell
Which way does an anticyclone tilt in the southern hemisphere?
Easterly leaning with height
Westerly leaning with height
North westerly leaning with height
South westerly leaning with height
When are ROFORs issued?
At the operators discretion
4 times during the day UTC
4 times during the day NZST
2 times during the day UTC
What is soft hail?
Snow that has ice building up on it
Hail that melts as it falls
Also known as grauple and is only found in Cb
Frozen virga
At FL340 the ambient temperature is -48 degrees Celsius. What is the ISA deviation?
ISA -4
ISA+4
ISA -7
ISA +7
With reference to Buy Ballots law, describe the thermal wind
In the southern hemisphere the thermal wind blows with the cold centre to one's right
In the southern hemisphere the thermal wind blows with the warm centre to one's right
In the northern hemisphere the thermal wind blows with the warm centre to one's left
In the northern hemisphere the thermal wind blows with the cold centre to one's right
A parcel of air has a temperature of 30°C and a relative humidity of 40%. What is the dew point?
15°C
25°C
22°C
18°C
What is each contour line measuring?
Height AGL taking into account sea level pressure and measured in feet
Height AGL taking into account sea level pressure and atmospheric temperature i.e density
Height AMSL taking into account sea level pressure and atmospheric temperature i.e density
Height AMSL taking into account sea level temperature
The temperature of the ocean in the western pacific in a neutral changing to positive ENSO index is:
Getting warmer
Getting colder
Unchanged due to the trade winds
Initially warmer but then becoming colder
How do satellites measure the duration of precipitation?
Trilateration
Triangulation
Doppler effect
They take a series of photos and measure the movement to make a prediction on duration
The Australian dry season occurs in:
winter and winds will come from the SE
winter and winds will come from the SW
summer and winds will come from the SE
summer and winds will come from the NE
What time of year are tropical cyclones generally experienced in the southern hemisphere?
OCT-MAR
JUN-NOV
JUL-DEC
DEC-JUN
What is the symbol on a SIGMET for light icing?
A
B
C
There is no symbol for light icing
Select all that applies regarding white out:
Flat light creating disorientation due to the optical illusion
Lack of depth perception
Recued engine performance
Can create illusion of ascending or descending
What does this symbol mean on a medium-level and high-level SIGWX chart?
Widespread fog
Widespread mist
Snow
Widespread haze
With regard to the Southern Hemisphere sub-tropical jet-stream, the worst turbulence is ____ the jet-stream and in the ____
above, warm sector
above, cold sector
below, warm sector
below, cold sector
What is not a factor of a supercell thunderstorm?
Mesocyclone rotating up draughts
Stability through a layer between warm and cold air
Instability through a deep layer
A large moisture amount of moisture in the air
What airmass would you find with a high temperature, low relative humidity and high moisture content?
Tropical maritime
Tropical continental
Polar maritime
Polar continental
When an aircraft loses energy it's known as ____ and can also be caused by up draughts and down draughts
Turbulence
Instability
Stability
Convergence
When would a squall occur?
Mature stage
Decaying stage
Developing stage
Semi-permanent stage
Why does the SALR steepen?
Due to the reduction in water vapor at higher altitudes and higher latitudes. This means less latent heat is released and then SALR steepen
Due to the reduction in water vapor at higher altitudes and lower latitudes. This means more latent heat is released and the SALR steepens
Due to the addition of ice nuclei in the air at higher altitudes, causing air to cool down faster and steepen the SALR
Due to the reduction in the effect terrestrial radiation has on the lapse rate. Therefore cooling down faster at higher altitudes and steepening the SALR
