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Natural fibre products Quiz 11

Theme: Natural Fibre Products NFP Quiz 11 Natural fibre products Quiz 11

Natural fibre products Quiz 11

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Question 1 of 10

1. Question
1. What is the main difference between open draw and closed draw in web transfer?
- A) Open draw relies on web tension; closed draw uses suction rolls
- B) Open draw uses suction rolls; closed draw uses web tension
- C) Open draw is used in fast machines; closed draw in slow machines
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Question 2 of 10

2. Question
2. In a three-nip configuration, when does the first open draw occur?
- A) After the third nip
- B) After the second nip
- C) After the first nip
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Question 3 of 10

3. Question
3. Which mechanism helps reduce adhesion and aids in web release?
- A) Decreasing liquid film thickness
- B) Liquid cavitation
- C) High surface energy
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Question 4 of 10

4. Question
4. Why is web tension critical in open draw sections?
- A) It increases adhesion
- B) It prevents web flutter and defects
- C) It eliminates the need for suction rolls
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Question 5 of 10

5. Question
5. What is the role of a blow box in a four-nip press section?
- A) To dry the web
- B) To prevent flutter during transfer
- C) To increase web tension
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Question 6 of 10

6. Question
6. Which press section configuration eliminates the need for tail threading?
- A) Four-nip with open draw
- B) Three-nip with center roll
- C) Straight-through press with closed draw
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Question 7 of 10

7. Question
7. What is the main advantage of shoe presses in high-speed machines?
- A) They allow for fewer press nips
- B) They eliminate the need for dryers
- C) They increase web tension
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Question 8 of 10

8. Question
8. Which drying technique uses compressive pressure and hot surfaces up to 500°C?
- A) Press drying
- B) Condebelt process
- C) Impulse drying
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Question 9 of 10

9. Question
9. What type of press section is typically used for sack paper?
- A) Smooth roll press
- B) Three-nip with center roll
- C) Shoe press in the last position
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Question 10 of 10

10. Question
10. What are the key criteria for selecting a press section configuration?
- A) Web thickness and grammage
- B) Web tension and adhesion
- C) Water removal, sheet quality, runnability, costs
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This page has been updated 07.01.2026

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