11840606
Descrição
Quiz por Jose Antonio Vazquez, atualizado more than 1 year ago
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Criado por Jose Antonio Vazquez
mais de 6 anos atrás
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Questão 1
Questão
1- The conditions which must exist to allow thunderstorms to develop are:
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A trigger action, a plentiful supply of moisture and a very stable atmosphere.
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A steep lapse rate, a stable atmosphere through a large vertical extent and a plentiful supply of moisture.
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A plentiful supply of moisture and a steep lapse rate through a large vertical extent and a trigger action.
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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:
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Microburst, windshear and anvil.
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Icing, microburst and windshear.
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Icing, drizzle and microburst.
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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:
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Covergence in temperate latitudes.
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Convergence in tropical latitudes.
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Subsidence in tropical latitudes.
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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
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Building / up currents and down currents.
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Mature / up currents and down currents.
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Dissipating / up currents and down currents.
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Building / down currents only.
Questão 5
Questão
5- The following is unlikely to be a hazard below a thunderstorm:
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Severe turbulence.
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Severe icing.
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Windshear.
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Large variations in pressure setting values.
Questão 6
Questão
6- Thunderstorms are likely if:
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Air is unstable, there is sufficient water vapour and there is a trigger action.
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Air is completely stable, there is sufficient water vapour and there is lifting orographically.
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There is a warm front.
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There is a col in winter.
Questão 7
Questão
7- Hail grows by:
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Freezing as it leaves the cloud.
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By up and down progress in CU cloud.
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By collision with supercooled water drops.
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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?
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2-3 hours.
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1-2 hours.
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4-5 hours.
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About 1 hour
Questão 9
Questão
9- A microburst usually lasts for _____ and is about _____ across.
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20 minutes. 20 nm.
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5 minutes. 5 km.
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30 minutes. 10 km.
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45 minutes. 5 nm.
Questão 10
Questão
10- When flying through an active CB cloud, lightning strikes are most likely:
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Above 5000' and underneath the anvil.
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In the clear air below the the cloud in rain.
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In the temperature band between +10ºC and -10ºC.
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At about 10000 ft above AMSL.
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