Atmosphere Test

10 Questions

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Atmosphere Test


Questions and Answers
  • 1. 
    Where are Jetstreams normally located? 
    • A. 

      In areas of strong low pressure systems in the stratosphere.

    • B. 

      At the tropopause where intensified temperature gradients are located.

    • C. 

      In a single continuous band, encircling the Earth, where there is a break between the equatorial and polar tropopause.

    • D. 

      In areas of strong high pressure systems in the stratosphere.

  • 2. 
    In which zone of a jet stream is the strongest CAT to be expected? 
    • A. 

      About 12000 FT above the core.

    • B. 

      The warm air side of the core.

    • C. 

      Exactly in the center of the core.

    • D. 

      The cold air side of the core.

  • 3. 
    Which type clouds may be associated with the jetstream? 
    • A. 

      CB cloud line where the jetstream crosses the cold front.

    • B. 

      CI clouds on the equatorial side of the jetstream.

    • C. 

      CS cloud band on the polar side and under the jetstream.

    • D. 

      CI clouds on the polar side of the jetstream.

  • 4. 
    Which of the following types of jet streams can be observed all year round? 
    • A. 

      Equatorial jet stream / arctic jet stream.

    • B. 

      Equatorial jet stream / polar front jet stream.

    • C. 

      Arctic jet stream / subtropical jet stream.

    • D. 

      Subtropical jet stream / polar front jet stream

  • 5. 
    The atmospheric conditions required before a sea breeze starts are: 
    • A. 

      A reduction in the decrease of pressure with height over land compared with the sea.

    • B. 

      An increase in pressure for a given upper level due to surface heating by day

    • C. 

      Increase in stability over the sea due to nocturnal cooling

    • D. 

      Decrease in stability over the land due to insolation

  • 6. 
    A cumulonimbus cloud at mid-latitudes in summer contains
    • A. 

      Ice crystals and water droplets but never supercooled water droplets

    • B. 

      Only ice crystals

    • C. 

      Only water droplets

    • D. 

      Ice crystals, water droplets and supercooled water droplets

  • 7. 
    The most dangerous icing conditions are encountered in
    • A. 

      icy clouds at high levels

    • B. 

      Supercooled precipitation

    • C. 

      Zones where the air temperature is below -15°C

    • D. 

      Unstable clouds at medium levels

  • 8. 
    What is the effect of a strong low level inversion ?
    • A. 

      It promotes vertical wind shear

    • B. 

      It promotes extensive vertical movement of air

    • C. 

      It prevents vertical wind shear

    • D. 

      It results in good visual conditions near the surface

  • 9. 
    In which stage of the life cycle of a single thunderstorm cell occur both up- and downdrafts simultaneously?
    • A. 

      Mature stage

    • B. 

      Cumulus stage

    • C. 

      Dissipating stage

    • D. 

      In all stages

  • 10. 
    A microburst phenomenon can arise in the
    • A. 

      Downdraught of a cumulonimbus at the formation stage

    • B. 

      Updraught of a cumulonimbus at the growth stage

    • C. 

      Downdraught of a cumulonimbus at the mature stage

    • D. 

      Updraught of a cumulonimbus at the mature stage