11836479
Description
Quiz by Jose Antonio Vazquez, updated more than 1 year ago
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Created by Jose Antonio Vazquez
almost 7 years ago
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Question 1
Question
1- Which of the following channels can be used to estimate cloud top height?:
Answer
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Visible.
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Water vapour.
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IR and Visible.
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IR.
Question 2
Question
2- Which of these cloud types can't be observed in the water vapour channel?
Answer
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Cumulus humilis.
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Cumulonimbus capillatus (anvil cirrus).
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Cirrus.
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Cumulus humilis and cirrus.
Question 3
Question
3- Which of these cloud types can be viewed in the visible channel?
Answer
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Cirrus and cumulonimbus.
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Cumulus.
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Low stratus.
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All of them.
Question 4
Question
4- What is the smallest distinguishable feature that can be seen in the Meteosat visible channel?
Answer
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1.0 Km.
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2.5 km.
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7.5 km.
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10.5 km.
Question 5
Question
5- What is the cone of silence? (Choose the best answer.)
Answer
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The volume under the lowest elevation of the beam
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The volume above the highest elevation of the beams
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The volume between the lowest and highest scans in clear air mode
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The volume between the lowest and highest scans in precipitation mode
Question 6
Question
6- In which of the following instances would precipitation often go completely unobserved by radar due to the geometry of the radar beam?
Answer
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A tall thunderstorm producing rain very close to the radar
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A tall thunderstorm producing rain about 50 km (31 mi) away from the radar
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A low, stratiform cloud producing rain near the radar's maximum unambiguous range and a thunderstorm producing rain behind a mountain located 10 km (6 mi) from the radar.
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None of them.
Question 7
Question
7- What usually doesn't constitute ground clutter that we often see near a radar?
Answer
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Insects
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Birds
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Large particulate matter, like dust
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Fog
Question 8
Question
8- Which of the following phenomena appears on radar as evenly scattered bands of weak reflectivity or ripples near the radar, especially during the afternoon? (Choose the best answer.)
Answer
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Smoke
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Chaff
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Horizontal convective rolls
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Anomalous propagation
Question 9
Question
9- What reflectivity value is a general threshold that indicates hail? (Choose the best answer.)
Answer
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40 dBZ
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50 dBZ
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60 dBZ
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70 dBZ
Question 10
Question
10- Weather satellites measure radiation emitted by the Earth or reflected solar radiation
Answer
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They are usually passive detection devices.
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They are usually active detection devices.
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They are usually none of them.
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They are usually passive both of them.
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