11885740
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- At temperatures of between 0oC and -10oC clouds consist of:
Answer
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Entirely water droplets.
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Entirely ice crystals.
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Mostly water vapour.
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Mostly supercooled water droplets and a few ice crystals.
Question 2
Question
2- Turbulent clouds are most serious from the icing standpoint because:
Answer
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Strong vertical currents mean that a predominance of large supercooled water droplets will be present.
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Strong vertical currents mean that a predominance of small supercooled water droplets will be present.
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Turbulent clouds produce hail which sticks to the aircraft.
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Turbulent clouds indicate a low freezing level.
Question 3
Question
3- Hoar frost forms on an aircraft when:
Answer
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The aircraft suddenly enters a cloud at below freezing temperature.
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he aircraft in sub zero clear air suddenly enters a colder region.
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The aircraft in sub zero clear air suddenly enters a warmer moist region.
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The aircraft suddenly enters a cloud which is at higher temperature than the surrounding air.
Question 4
Question
4- Stratus cloud of limited depth at a temperature of -5o C will most likely give:
Answer
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Moderate to heavy rime ice.
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Moderate to heavy glaze ice.
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Light to moderate rime ice.
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Light to moderate glaze ice.
Question 5
Question
5- Most cases of serious piston engine icing occur in cloud, fog, or precipitation with a temperature range between:
Answer
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- 10ºC to +25ºC
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-18ºC to +5ºC
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-10ºC to 0ºC
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-20ºC to +15ºC
Question 6
Question
6- Clear ice forms as a result of:
Answer
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Large supercooled water droplets spreading as they freeze.
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Ice pellets splattering on the aircraft.
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Small supercooled water droplets splashing over the aircraft.
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Water vapur freezing to the aircraft.
Question 7
Question
7- Orographic uplift in stable conditions gives a strong vertical component to air movement thus supporting larger supercooled droplets in orographically formed cloud. Consideration should also be given to the fact that in this cloud:
Answer
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The 0ºC isotherm will be higher.
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The 0ºC isotherm will be lower.
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The lapse rate will be isothermal.
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An inversion can be anti-cyclonic.
Question 8
Question
8- Carburettor icing is unlikely:
Answer
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In cloud.
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At temperatures between -10oC and -30oC.
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In clear air.
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When the RH is 60%.
Question 9
Question
9- Flying 50 nm ahead of a warm front out of cloud at 1000 ft in winter, with an ambient temperature of -8oC, there is a strong risk of:
Answer
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Hoar frost.
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Rime icing and carburettor icing.
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Structure damage caused by hail.
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Clear ice in the form of rain ice.
Question 10
Question
10- In AS cloud at FL 170 and a temperature of -20oC the airframe icing most likely to be experienced is:
Answer
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Moderate clear icing.
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Light rime icing.
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Hoar frost.
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Severe clear icing.
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