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Year 9 Industrial Technology - Timber (Unit 2 Timber Defects)
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Mr Berto
Mr Buchan
Mr Galvin
Mr Katalinic
List the natural defects that can occur during the trees growth?
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What causes decay in timber?
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Why are knots a problem in a pieces of timber?
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What defect is caused from an injury to the tree?
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What causes the defect called 'pitch'?
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Name the three types of insect attack?
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Describe the problems that occur with 'compression wood'
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List the different types of drying defects?
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What is a method of reducing the probability of 'cupping' when drying timber?
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What causes 'Bows' and 'Crooks'?
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What causes a twist to occur in timber?
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What is the difference between 'Checks' and 'Splits'?
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Describe the defect 'collapse'?
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