FORESTRY
GENERAL FORESTRY
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Which of the following is true with regard to crown fires?
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They almost always start as surface fires
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They are more common in deciduous forests
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They are the most common type of forest fires
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They are the slowest spreading of all fires
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Explanation:
Detailed explanation-1: -A crown fire is particularly very dangerous in a coniferous forest because resinous material given off burning logs burn furiously.
Detailed explanation-2: -There are two types of crown fire: Intermittent crown fire where the trees are torching often but not continuously. Rate of spread is controlled by the surface fire. Continuous crown fire where a fire advances with a well-defined wall of flame extending from the surface fuel layer to above the crown fuel layer.
Detailed explanation-3: -Crown Fraction Burned (CFB) is the predicted fraction of the tree crowns consumed by the fire.
There is 1 question to complete.