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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. The 6 D's of Papermaking
All water used to dilute the thick stock is recovered from the wet end and used to dilute more stock
1) The wet end flow loop 2) The white water recirculation loop 3) The basis weight control loop
1) Open 2) Air- padded 3) Hydraulic
1) Dose 2) Dilute 3) Disperse 4) Distribute 5) Dewater 6) Dry

2. Most modern refining is done using _____
1) Gravity and light vacuum 2) Heavy vacuum 3) Mechanical pressure 4) Heat
Disk refiners
All water used to dilute the thick stock is recovered from the wet end and used to dilute more stock
Drainage rate (freeness)

3. Wet strength formula
Gets stock into the headbox
Wire
1) The wet end flow loop 2) The white water recirculation loop 3) The basis weight control loop
(Wet tensile x 100 %)/Dry tensile

4. What are the key functions of the headbox approach system?
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) 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
Gets stock into the headbox
All water used to dilute the thick stock is recovered from the wet end and used to dilute more stock

5. The headbox is actually made up of the _____ and the ______
1) Gravity and light vacuum 2) Heavy vacuum 3) Mechanical pressure 4) Heat
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
Disk refiners
Manifold (distributor) & the actual headbox

6. The ____ is the 'gatekeeper' - it sets the basis weight of the sheet
1) Gravity section 2) Vacuum section 3) Press section
When refining pulverizes the primary and outer secondary layers of the fiber wall
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
Basis weight valve

7. Refining reduces the _______ of the stock
Consistency & flow rate
Drainage rate (freeness)
Disk refiners
Refers to the weight per unit surface area (one side) of a paper sheet and is critical quality attribute

8. The headbox must distribute the stock evenly onto the ____
Refining
All water used to dilute the thick stock is recovered from the wet end and used to dilute more stock
Wire
1) Plain 2) Blind drilled 3) Grooved ('vented') 4) Vacuum (suction) press

9. What are the basic categories/types of additives used for papermaking?
Refining
Consistency & flow rate
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. Refining is done via ___________
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) Gravity and light vacuum 2) Heavy vacuum 3) Mechanical pressure 4) Heat
Drainage rate (freeness)

11. The headbox can be adjusted to control what?
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
All water used to dilute the thick stock is recovered from the wet end and used to dilute more stock
Drainage rate (freeness)

12. What are the three types of headboxes?
(Wet tensile x 100 %)/Dry tensile
All water used to dilute the thick stock is recovered from the wet end and used to dilute more stock
Disk refiners
1) Open 2) Air- padded 3) Hydraulic

13. The _____ must get the same amount of fiber spread evenly across the headbox
Manifold (distributor) & the actual headbox
Basis weight valve
Manifold
1) The wet end flow loop 2) The white water recirculation loop 3) The basis weight control loop

14. What are the three main types of paper machine wet ends?
When refining pulverizes the primary and outer secondary layers of the fiber wall
1) Gravity section 2) Vacuum section 3) Press section
The component makeup (recipe) of the sheet
Rolling friction between surfaces

15. Three basic parts of the stock preparation area are...
Consistency & flow rate
1) Blending and furnish control 2) Control of consistency 3) Refining
1) Gravity section 2) Vacuum section 3) Press section
Manifold (distributor) & the actual headbox

16. Consistency
1) Gravity section 2) Vacuum section 3) Press section
Basis weight valve
The solids (dry) fraction of a papermaking slurry or pulp sample
1) Open 2) Air- padded 3) Hydraulic

17. What are the main forces used to remove water on a paper machine wet end?
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) Gravity and light vacuum 2) Heavy vacuum 3) Mechanical pressure 4) Heat
1) Overall stock flow 2) Angle of flow 3) Speed of flow 4) Amount of flow at different points across the machine
Manifold (distributor) & the actual headbox

18. The 'white water loop'
1) Dose 2) Dilute 3) Disperse 4) Distribute 5) Dewater 6) Dry
1) Open 2) Air- padded 3) Hydraulic
All water used to dilute the thick stock is recovered from the wet end and used to dilute more stock
1) The wet end flow loop 2) The white water recirculation loop 3) The basis weight control loop

19. Basis Weight
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
Refers to the weight per unit surface area (one side) of a paper sheet and is critical quality attribute
1) Dose 2) Dilute 3) Disperse 4) Distribute 5) Dewater 6) Dry

20. Refining (Beating)
Gets stock into the headbox
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
The component makeup (recipe) of the sheet
Consistency & flow rate

21. What does the headbox do?
1) Blending and furnish control 2) Control of consistency 3) Refining
Delivers stock onto the wire
(Wet tensile x 100 %)/Dry tensile
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

22. Other names for the headbox approach system
1) Plain 2) Blind drilled 3) Grooved ('vented') 4) Vacuum (suction) press
1) The wet end flow loop 2) The white water recirculation loop 3) The basis weight control loop
Rolling friction between surfaces
1) Dose 2) Dilute 3) Disperse 4) Distribute 5) Dewater 6) Dry

23. In order to control the basis weight of the sheet - the ____ and _____ of the streams must be measured and controlled
Consistency & flow rate
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
Wire

24. Strong - smooth - printable paper CANNOT be made without the use of _____
1) Blending and furnish control 2) Control of consistency 3) Refining
Refining
Consistency & flow rate
Basis weight valve

25. What are the types of press rolls?

26. What does the manifold do?
Gets stock into the headbox
Consistency & flow rate
The solids (dry) fraction of a papermaking slurry or pulp sample
Wire

27. How are papermaking fines produced?
When refining pulverizes the primary and outer secondary layers of the fiber wall
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
The solids (dry) fraction of a papermaking slurry or pulp sample
All water used to dilute the thick stock is recovered from the wet end and used to dilute more stock

28. Furnish
The component makeup (recipe) of the sheet
(Wet tensile x 100 %)/Dry tensile
The solids (dry) fraction of a papermaking slurry or pulp sample
1) Dose 2) Dilute 3) Disperse 4) Distribute 5) Dewater 6) Dry