12. Thunderstorms

Descrição

Tema 1 Meteo Quiz sobre 12. Thunderstorms, criado por Jose Antonio Vazquez em 05-01-2018.
Jose Antonio Vazquez
Quiz por Jose Antonio Vazquez, atualizado more than 1 year ago
Jose Antonio Vazquez
Criado por Jose Antonio Vazquez quase 7 anos atrás
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Resumo de Recurso

Questão 1

Questão
1- The conditions which must exist to allow thunderstorms to develop are:
Responda
  • 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.

Questão 2

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

Questão 3

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

Questão 4

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

Questão 5

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

Questão 6

Questão
6- Thunderstorms are likely if:
Responda
  • 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.

Questão 7

Questão
7- Hail grows by:
Responda
  • 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.

Questão 8

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

Questão 9

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

Questão 10

Questão
10- When flying through an active CB cloud, lightning strikes are most likely:
Responda
  • 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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