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Natural fibre products Quiz 32

Theme: Natural Fibre Products NFP Quiz 32 Natural fibre products Quiz 32

Natural fibre products Quiz 32

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Question 1 of 10

1. Question
1. What mechanical property is especially important for the rigidity and strength of paperboard?
- A) Opacity
- B) Bending stiffness
- C) Surface gloss
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Question 2 of 10

2. Question
2. What is the main factor that increases bending stiffness in paper and board?
- A) Increased grammage
- B) Increased opacity
- C) Increased grammage
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Question 3 of 10

3. Question
3. In a multilayer board, which layer placement maximizes bending stiffness?
- A) Chemical pulp on the surfaces
- B) Soft pulp in the middle
- C) High filler content in the core
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Question 4 of 10

4. Question
4. What is the typical relationship between compressive strength and tensile strength in paperboard?
- A) Compressive strength is about one third of tensile strength
- B) Compressive strength is about one third of tensile strength
- C) Compressive strength is always higher
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Question 5 of 10

5. Question
5. Which property is most sensitive to changes in paper thickness?
- A) Conductivity
- B) Linting
- C) Bending stiffness
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Question 6 of 10

6. Question
6. What is the effect of beating on the compressive strength of paper?
- A) It increases compressive strength
- B) It increases compressive strength
- C) It has no effect
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Question 7 of 10

7. Question
7. What is the main cause of delamination in multilayer boards?
- A) High opacity
- B) Weak ply-bond strength
- C) Weak ply-bond strength
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Question 8 of 10

8. Question
8. Which direction (MD or CD) usually has higher bending stiffness in machine-made paper?
- A) Machine direction (MD)
- B) Cross-machine direction (CD)
- C) Thickness direction (ZD)
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Question 9 of 10

9. Question
9. What is the effect of fillers on out-of-plane strength?
- A) Fillers generally reduce out-of-plane strength
- B) Fillers always increase strength
- C) Fillers have no effect
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Question 10 of 10

10. Question
10. What is the main measurement used to characterize out-of-plane strength?
- A) Scott bond
- B) Tensile index
- C) Scott bond
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This page has been updated 07.01.2026

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