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Paper Science

Instructions:

Answer 28 questions in 15 minutes.
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Match each statement with the correct term.
Don't refresh. All questions and answers are randomly picked and ordered every time you load a test.

This is a study tool. The 3 wrong answers for each question are randomly chosen from answers to other questions. So, you might find at times the answers obvious, but you will see it re-enforces your understanding as you take the test each time.

1. Strong - smooth - printable paper CANNOT be made without the use of _____
When refining pulverizes the primary and outer secondary layers of the fiber wall
Disk refiners
Refining
Drainage rate (freeness)

2. What does the headbox do?
1) Gravity and light vacuum 2) Heavy vacuum 3) Mechanical pressure 4) Heat
When refining pulverizes the primary and outer secondary layers of the fiber wall
Rolling friction between surfaces
Delivers stock onto the wire

3. How are papermaking fines produced?
When refining pulverizes the primary and outer secondary layers of the fiber wall
1) The wet end flow loop 2) The white water recirculation loop 3) The basis weight control loop
The solids (dry) fraction of a papermaking slurry or pulp sample
1) Gravity section 2) Vacuum section 3) Press section

4. What are the key functions of the headbox approach system?
1) Metering of THICK STOCK for basis weight control 2) Dispersion and dilution of the THICK STOCK into THIN STOCK 3) Uniform distribution of the THIN STOCK across the width of the machine
Refers to the weight per unit surface area (one side) of a paper sheet and is critical quality attribute
Manifold (distributor) & the actual headbox
1) Gravity section 2) Vacuum section 3) Press section

5. The _____ must get the same amount of fiber spread evenly across the headbox
Manifold
Rolling friction between surfaces
Manifold (distributor) & the actual headbox
(Wet tensile x 100 %)/Dry tensile

6. What does the manifold do?
Gets stock into the headbox
Refers to the weight per unit surface area (one side) of a paper sheet and is critical quality attribute
Manifold (distributor) & the actual headbox
The component makeup (recipe) of the sheet

7. Refining (Beating)
A harsh mechanical action carried out on fibers to: 1) Collapse them into flat papermaking ribbons and 2) Fibrillate the outer surface of the fiber to increase bonding area and sheet strength
Manifold (distributor) & the actual headbox
1) The wet end flow loop 2) The white water recirculation loop 3) The basis weight control loop
The solids (dry) fraction of a papermaking slurry or pulp sample

8. The 'white water loop'
The component makeup (recipe) of the sheet
1) Gravity and light vacuum 2) Heavy vacuum 3) Mechanical pressure 4) Heat
1) Blending and furnish control 2) Control of consistency 3) Refining
All water used to dilute the thick stock is recovered from the wet end and used to dilute more stock

9. Refining is done via ___________
Refers to the weight per unit surface area (one side) of a paper sheet and is critical quality attribute
Delivers stock onto the wire
Rolling friction between surfaces
1) Retention aids 2) Sizing agents 3) Fillers 4) Strength additives 5) Dyes & pigments 6) pH control additives 7) Specialty additives 8) Operational improvement additives

10. The 6 D's of Papermaking
Rolling friction between surfaces
Drainage rate (freeness)
Manifold
1) Dose 2) Dilute 3) Disperse 4) Distribute 5) Dewater 6) Dry

11. What are the three main types of paper machine wet ends?
1) Overall stock flow 2) Angle of flow 3) Speed of flow 4) Amount of flow at different points across the machine
1) Gravity section 2) Vacuum section 3) Press section
When refining pulverizes the primary and outer secondary layers of the fiber wall
Basis weight valve

12. Three basic parts of the stock preparation area are...
Drainage rate (freeness)
Refers to the weight per unit surface area (one side) of a paper sheet and is critical quality attribute
Manifold (distributor) & the actual headbox
1) Blending and furnish control 2) Control of consistency 3) Refining

13. The headbox is actually made up of the _____ and the ______
Manifold (distributor) & the actual headbox
The component makeup (recipe) of the sheet
All water used to dilute the thick stock is recovered from the wet end and used to dilute more stock
1) Gravity and light vacuum 2) Heavy vacuum 3) Mechanical pressure 4) Heat

14. Wet strength formula
Manifold (distributor) & the actual headbox
The component makeup (recipe) of the sheet
A harsh mechanical action carried out on fibers to: 1) Collapse them into flat papermaking ribbons and 2) Fibrillate the outer surface of the fiber to increase bonding area and sheet strength
(Wet tensile x 100 %)/Dry tensile

15. What are the three types of headboxes?
1) Dose 2) Dilute 3) Disperse 4) Distribute 5) Dewater 6) Dry
1) Blending and furnish control 2) Control of consistency 3) Refining
A harsh mechanical action carried out on fibers to: 1) Collapse them into flat papermaking ribbons and 2) Fibrillate the outer surface of the fiber to increase bonding area and sheet strength
1) Open 2) Air- padded 3) Hydraulic

16. Consistency
Manifold
Wire
The solids (dry) fraction of a papermaking slurry or pulp sample
A harsh mechanical action carried out on fibers to: 1) Collapse them into flat papermaking ribbons and 2) Fibrillate the outer surface of the fiber to increase bonding area and sheet strength

17. What are the basic categories/types of additives used for papermaking?
A harsh mechanical action carried out on fibers to: 1) Collapse them into flat papermaking ribbons and 2) Fibrillate the outer surface of the fiber to increase bonding area and sheet strength
1) Overall stock flow 2) Angle of flow 3) Speed of flow 4) Amount of flow at different points across the machine
1) Plain 2) Blind drilled 3) Grooved ('vented') 4) Vacuum (suction) press
1) Retention aids 2) Sizing agents 3) Fillers 4) Strength additives 5) Dyes & pigments 6) pH control additives 7) Specialty additives 8) Operational improvement additives

18. In order to control the basis weight of the sheet - the ____ and _____ of the streams must be measured and controlled
Drainage rate (freeness)
Consistency & flow rate
1) Metering of THICK STOCK for basis weight control 2) Dispersion and dilution of the THICK STOCK into THIN STOCK 3) Uniform distribution of the THIN STOCK across the width of the machine
Refers to the weight per unit surface area (one side) of a paper sheet and is critical quality attribute

19. The headbox must distribute the stock evenly onto the ____
The solids (dry) fraction of a papermaking slurry or pulp sample
The component makeup (recipe) of the sheet
Delivers stock onto the wire
Wire

20. Basis Weight
Refers to the weight per unit surface area (one side) of a paper sheet and is critical quality attribute
Rolling friction between surfaces
1) Retention aids 2) Sizing agents 3) Fillers 4) Strength additives 5) Dyes & pigments 6) pH control additives 7) Specialty additives 8) Operational improvement additives
1) Overall stock flow 2) Angle of flow 3) Speed of flow 4) Amount of flow at different points across the machine

21. The ____ is the 'gatekeeper' - it sets the basis weight of the sheet
Basis weight valve
(Wet tensile x 100 %)/Dry tensile
Rolling friction between surfaces
Manifold (distributor) & the actual headbox

22. Furnish
Delivers stock onto the wire
The component makeup (recipe) of the sheet
A harsh mechanical action carried out on fibers to: 1) Collapse them into flat papermaking ribbons and 2) Fibrillate the outer surface of the fiber to increase bonding area and sheet strength
Wire

23. What are the types of press rolls?

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24. The headbox can be adjusted to control what?
Consistency & flow rate
1) Gravity and light vacuum 2) Heavy vacuum 3) Mechanical pressure 4) Heat
Rolling friction between surfaces
1) Overall stock flow 2) Angle of flow 3) Speed of flow 4) Amount of flow at different points across the machine

25. What are the main forces used to remove water on a paper machine wet end?
1) Gravity and light vacuum 2) Heavy vacuum 3) Mechanical pressure 4) Heat
Rolling friction between surfaces
(Wet tensile x 100 %)/Dry tensile
1) The wet end flow loop 2) The white water recirculation loop 3) The basis weight control loop

26. Most modern refining is done using _____
1) Open 2) Air- padded 3) Hydraulic
When refining pulverizes the primary and outer secondary layers of the fiber wall
Gets stock into the headbox
Disk refiners

27. Other names for the headbox approach system
1) Blending and furnish control 2) Control of consistency 3) Refining
Basis weight valve
1) The wet end flow loop 2) The white water recirculation loop 3) The basis weight control loop
Manifold (distributor) & the actual headbox

28. Refining reduces the _______ of the stock
1) The wet end flow loop 2) The white water recirculation loop 3) The basis weight control loop
Drainage rate (freeness)
1) Blending and furnish control 2) Control of consistency 3) Refining
Wire