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Paper Science

Instructions:

Answer 28 questions in 15 minutes.
If you are not ready to take this test, you can study here.
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. What are the three types of headboxes?
1) Open 2) Air- padded 3) Hydraulic
Gets stock into the headbox
When refining pulverizes the primary and outer secondary layers of the fiber wall
The component makeup (recipe) of the sheet

2. The 'white water loop'
(Wet tensile x 100 %)/Dry tensile
Manifold (distributor) & the actual headbox
All water used to dilute the thick stock is recovered from the wet end and used to dilute more stock
1) Blending and furnish control 2) Control of consistency 3) Refining

3. What are the basic categories/types of additives used for papermaking?
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
Manifold (distributor) & the actual headbox
1) The wet end flow loop 2) The white water recirculation loop 3) The basis weight control loop
All water used to dilute the thick stock is recovered from the wet end and used to dilute more stock

4. What are the types of press rolls?

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5. Refining reduces the _______ of the stock
All water used to dilute the thick stock is recovered from the wet end and used to dilute more stock
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
Drainage rate (freeness)
Wire

6. How are papermaking fines produced?
1) Dose 2) Dilute 3) Disperse 4) Distribute 5) Dewater 6) Dry
The component makeup (recipe) of the sheet
Wire
When refining pulverizes the primary and outer secondary layers of the fiber wall

7. Basis Weight
Refers to the weight per unit surface area (one side) of a paper sheet and is critical quality attribute
Manifold
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
1) Gravity section 2) Vacuum section 3) Press section

8. Consistency
The solids (dry) fraction of a papermaking slurry or pulp sample
1) Gravity section 2) Vacuum section 3) Press section
Manifold (distributor) & the actual headbox
(Wet tensile x 100 %)/Dry tensile

9. Other names for the headbox approach system
1) Gravity and light vacuum 2) Heavy vacuum 3) Mechanical pressure 4) Heat
(Wet tensile x 100 %)/Dry tensile
Wire
1) The wet end flow loop 2) The white water recirculation loop 3) The basis weight control loop

10. The headbox can be adjusted to control what?
1) Overall stock flow 2) Angle of flow 3) Speed of flow 4) Amount of flow at different points across the machine
All water used to dilute the thick stock is recovered from the wet end and used to dilute more stock
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) Gravity section 2) Vacuum section 3) Press section

11. What are the three main types of paper machine wet ends?
Disk refiners
1) Gravity section 2) Vacuum section 3) Press section
Gets stock into the headbox
Consistency & flow rate

12. What does the headbox do?
Manifold (distributor) & the actual headbox
Delivers stock onto the wire
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) The wet end flow loop 2) The white water recirculation loop 3) The basis weight control loop

13. Most modern refining is done using _____
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) Dose 2) Dilute 3) Disperse 4) Distribute 5) Dewater 6) Dry
Disk refiners
When refining pulverizes the primary and outer secondary layers of the fiber wall

14. 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
Manifold (distributor) & the actual headbox
Refers to the weight per unit surface area (one side) of a paper sheet and is critical quality attribute

15. Strong - smooth - printable paper CANNOT be made without the use of _____
Refers to the weight per unit surface area (one side) of a paper sheet and is critical quality attribute
Refining
1) Blending and furnish control 2) Control of consistency 3) Refining
Gets stock into the headbox

16. The 6 D's of Papermaking
When refining pulverizes the primary and outer secondary layers of the fiber wall
1) Gravity and light vacuum 2) Heavy vacuum 3) Mechanical pressure 4) Heat
1) Dose 2) Dilute 3) Disperse 4) Distribute 5) Dewater 6) Dry
Manifold

17. Wet strength formula
1) Open 2) Air- padded 3) Hydraulic
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
(Wet tensile x 100 %)/Dry tensile
Wire

18. Furnish
Wire
1) Blending and furnish control 2) Control of consistency 3) Refining
The component makeup (recipe) of the sheet
Rolling friction between surfaces

19. The headbox is actually made up of the _____ and the ______
The component makeup (recipe) of the sheet
Rolling friction between surfaces
Refining
Manifold (distributor) & the actual headbox

20. The ____ is the 'gatekeeper' - it sets the basis weight of the sheet
All water used to dilute the thick stock is recovered from the wet end and used to dilute more stock
Basis weight valve
Refining
1) Open 2) Air- padded 3) Hydraulic

21. In order to control the basis weight of the sheet - the ____ and _____ of the streams must be measured and controlled
Consistency & flow rate
1) Open 2) Air- padded 3) Hydraulic
1) Overall stock flow 2) Angle of flow 3) Speed of flow 4) Amount of flow at different points across the machine
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

22. Refining is done via ___________
When refining pulverizes the primary and outer secondary layers of the fiber wall
Rolling friction between surfaces
Manifold (distributor) & the actual headbox
1) Gravity section 2) Vacuum section 3) Press section

23. The _____ must get the same amount of fiber spread evenly across the headbox
(Wet tensile x 100 %)/Dry tensile
Refers to the weight per unit surface area (one side) of a paper sheet and is critical quality attribute
Drainage rate (freeness)
Manifold

24. What are the main forces used to remove water on a paper machine wet end?
(Wet tensile x 100 %)/Dry tensile
Manifold (distributor) & the actual headbox
Rolling friction between surfaces
1) Gravity and light vacuum 2) Heavy vacuum 3) Mechanical pressure 4) Heat

25. Three basic parts of the stock preparation area are...
Manifold
1) Blending and furnish control 2) Control of consistency 3) Refining
Drainage rate (freeness)
All water used to dilute the thick stock is recovered from the wet end and used to dilute more stock

26. The headbox must distribute the stock evenly onto the ____
Rolling friction between surfaces
Wire
All water used to dilute the thick stock is recovered from the wet end and used to dilute more stock
Gets stock into the headbox

27. What does the manifold do?
1) Overall stock flow 2) Angle of flow 3) Speed of flow 4) Amount of flow at different points across the machine
1) Open 2) Air- padded 3) Hydraulic
Gets stock into the headbox
Consistency & flow rate

28. What are the key functions of the headbox approach system?
Consistency & flow rate
1) Dose 2) Dilute 3) Disperse 4) Distribute 5) Dewater 6) Dry
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
1) Gravity section 2) Vacuum section 3) Press section