Sources and origins (AQA GCSE Design and Technology): Quizzes
📚Quizzes
Practise the questions
12 questions from this quiz
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Practise the questions
12 questions from this quiz
What percentage of timber for paper comes from coniferous trees?
What percentage of timber for paper comes from coniferous trees?
85%
Why are coniferous trees preferred for paper production?
Why are coniferous trees preferred for paper production?
They have long, strong fibres
Which characteristic identifies coniferous trees?
Which characteristic identifies coniferous trees?
They have cones
Which of these is an alternative raw material for paper production?
Which of these is an alternative raw material for paper production?
Bamboo
By how much can using recycled paper reduce energy consumption?
By how much can using recycled paper reduce energy consumption?
Up to 60%
Which chemical breaks down lignin during pulping?
Which chemical breaks down lignin during pulping?
Sodium hydroxide
What is lignin's function in wood?
What is lignin's function in wood?
Natural glue holding fibres together
What percentage of pulp slurry is water?
What percentage of pulp slurry is water?
99%
What is the effect of more calendaring on paper?
What is the effect of more calendaring on paper?
Higher gloss finish
How many layers does duplex board have?
How many layers does duplex board have?
Two layers
What structure does corrugated cardboard have?
What structure does corrugated cardboard have?
Fluted layer between flat outer layers
What do sizing agents provide to paper and board?
What do sizing agents provide to paper and board?
Water resistance & better printing