12. Thunderstorms

Descripción

Tema 1 Meteo Test sobre 12. Thunderstorms, creado por Jose Antonio Vazquez el 05/01/2018.
Jose Antonio Vazquez
Test por Jose Antonio Vazquez, actualizado hace más de 1 año
Jose Antonio Vazquez
Creado por Jose Antonio Vazquez hace casi 7 años
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Resumen del Recurso

Pregunta 1

Pregunta
1- The conditions which must exist to allow thunderstorms to develop are:
Respuesta
  • A trigger action, a plentiful supply of moisture and a very stable atmosphere.
  • A steep lapse rate, a stable atmosphere through a large vertical extent and a plentiful supply of moisture.
  • A plentiful supply of moisture and a steep lapse rate through a large vertical extent and a trigger action.
  • A steep lapse rate through a large vertical extent, a low relative humidity and a trigger action.

Pregunta 2

Pregunta
2- Hazards of the mature stage of a TS cell include lightning, turbulence and:
Respuesta
  • Microburst, windshear and anvil.
  • Icing, microburst and windshear.
  • Icing, drizzle and microburst.
  • Windshear, hail and fog.

Pregunta 3

Pregunta
3- Thunderstorms require a trigger action to release the conditional instability. Which of the following woud be the least suitable as a trigger:
Respuesta
  • Covergence in temperate latitudes.
  • Convergence in tropical latitudes.
  • Subsidence in tropical latitudes.
  • Convection in polar latitudes.

Pregunta 4

Pregunta
4. During the _____ stage of a thunderstorm cell, the cloud contains _____ . Complete the above statement correctly using one o
Respuesta
  • Building / up currents and down currents.
  • Mature / up currents and down currents.
  • Dissipating / up currents and down currents.
  • Building / down currents only.

Pregunta 5

Pregunta
5- The following is unlikely to be a hazard below a thunderstorm:
Respuesta
  • Severe turbulence.
  • Severe icing.
  • Windshear.
  • Large variations in pressure setting values.

Pregunta 6

Pregunta
6- Thunderstorms are likely if:
Respuesta
  • Air is unstable, there is sufficient water vapour and there is a trigger action.
  • Air is completely stable, there is sufficient water vapour and there is lifting orographically.
  • There is a warm front.
  • There is a col in winter.

Pregunta 7

Pregunta
7- Hail grows by:
Respuesta
  • Freezing as it leaves the cloud.
  • By up and down progress in CU cloud.
  • By collision with supercooled water drops.
  • By collision with ice crystals.

Pregunta 8

Pregunta
8- How long approximately does a Cumulonimbus cell take to complete the full cycle from the Cumulus (building) to dissipating stage?
Respuesta
  • 2-3 hours.
  • 1-2 hours.
  • 4-5 hours.
  • About 1 hour

Pregunta 9

Pregunta
9- A microburst usually lasts for _____ and is about _____ across.
Respuesta
  • 20 minutes. 20 nm.
  • 5 minutes. 5 km.
  • 30 minutes. 10 km.
  • 45 minutes. 5 nm.

Pregunta 10

Pregunta
10- When flying through an active CB cloud, lightning strikes are most likely:
Respuesta
  • Above 5000' and underneath the anvil.
  • In the clear air below the the cloud in rain.
  • In the temperature band between +10ºC and -10ºC.
  • At about 10000 ft above AMSL.
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