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Meteorology

There are 20 questions in this examination.
Only one answer is correct.  The pass mark is 75%
You would normally be allowed 60 minutes. (This quiz is not timed.)

1   When air is warmed, it rises. This process is called:

   A  conduction
   B  convection
   C  advection
   D  absorption

2   What is 18 degrees Fahrenheit, expressed using the Celsius scale?

   A  -2 degrees Celsius
   B  -12.1 degrees Celsius
   C  -7.8 degrees Celsius
   D  28 degrees Celsius

3   There are three necessary conditions for a thunderstorm to develop. One is a trigger action to start the air rising. What are the other two requirements?

   A  An unstable atmosphere with low moisture content
   B  A stable atmosphere with a low moisture content
   C  A stable atmosphere with a high moisture content
   D  An unstable atmosphere with high moisture content

4   What kind of flying conditions would you associate with the following symbol (drawn from a Significant Weather chart)?

   A  Possible low visibility due to rain
   B  IFR conditions in the area shown
   C  Potentially significant up and downdraughts
   D  Light turbulence

5   Whilst reading Form 215, you see a weather phenomena marked as OCNL. What does this mean?

   A  It is occasional
   B  It is overcast cloud with no discernible level
   C  It is only affecting northern latitudes
   D  It is an occlusion in the northern latitudes of the UK

6   Decode the cloud bases being described in this METAR for an aerodrome: 261450Z 07007KT 9999 FEW035 SCT043 BKN240 21/12 Q1016 NOSIG

   A  1-2 oktas at 3500 ft, 2-3 oktas at 4300 ft, 5-8 oktas at 24000 ft
   B  1-2 oktas at 350 ft, 3-4 oktas at 430 ft, 5-7 oktas at 2400 ft
   C  2-3 oktas at 3500 ft, 4-5 oktas at 4300 ft, 6-7 oktas at 24000 ft
   D  1-2 oktas at 3500 ft, 3-4 oktas at 4300 ft, 5-7 oktas at 24000 ft

7   A build up of clear ice blocks the pitot tube. What will your airspeed indicator read?

   A  It will stick at the airspeed indicated prior to the pitot freezing over
   B  It will over read slightly
   C  It will under read slightly
   D  It will read zero airspeed

8   A temperature inversion means that the temperature ______ as height is gained. In summer, this can lead to _______ conditions. What are the missing words?

   A  increases, hazy
   B  increases, clear
   C  decreases, clear
   D  decreases, hazy

9   How would a forecast easterly wind of 22 knots, gusting to 32 knots be represented in a TAF?

   A  09022-32KT
   B  090/22 G32 KT
   C  09022KTG32
   D  09022G32KT

10   What is the temperature lapse rate in the International Standard Atmosphere (ISA)?

   A  1.98 degrees Celsius for each 1000 ft
   B  1.98 degrees Fahrenheit for each 1000 ft
   C  3.98 degrees Celsius for each 1000 m
   D  1.98 degrees Celsius for each 1000 m

11   What is an AIRMET?

   A  A set of meterological observations for a specific area
   B  A meteorological forecast for a specific area
   C  A report of weather conditions transmitted to airborne pilots
   D  A report of weather conditions submitted by airborne pilots

12   The subsidence (sinking) of air flowing from a high pressure system leads to:

   A  divergence at the ground level
   B  convergence at the ground level
   C  adiabatic and isothermal compression at ground level
   D  low pressure conditions at the surface

13   What sort of weather are tropical maritime air masses usually associated with in winter?

   A  Warm and dry conditions
   B  Cold but clear conditions
   C  Cloud and rain
   D  Freezing conditions and severe icing

14   At sea level on the windward side of the mountain, the air has a temperature of +19 and dew point +5 degrees Celsius. Approximately what temperature would you expect the air to be on the lee side at 2000 ft?

   A  10 degrees Celsius
   B  11.5 degrees Celsius
   C  13 degrees Celsius
   D  16 degrees Celsius

15   Turbulence cloud is formed by:

   A  wind shear in the stratosphere
   B  high level wind activity
   C  fast aircraft passing through a stable atmosphere
   D  friction close to earth causing mixing and uplift

16   On a Significant Weather chart, what abbreviation is used to describe conditions likely to be encountered 'At Sea'?

   A  COT
   B  SEA
   C  MAR
   D  OW

17   In a METAR, cloud base is given relative to:

   A  elevation above the 1013 pressure datum
   B  altitude above mean sea level
   C  aerodrome level
   D  elevation above the average aerodrome ground level (within a 1.68 nm radius circle)

18   What is convergence at ground level caused by?

   A  The sinking of high pressure air
   B  Rising air flowing into a low pressure system
   C  Isothermal heat exchange
   D  Two air masses coming into contact with each other

19   Mountain waves, caused by the effect of high terrain may extend:

   A  up to 50 miles upwind of the mountains
   B  up to 1 mile downwind of the mountains
   C  up to 30-40 miles downwind of the mountains
   D  up to 100 miles upwind of the mountains

20   As air rises and cools, its relative humidity will:

   A  increase
   B  decrease
   C  decrease until the dew point is reached
   D  stay the same

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