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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. Three basic parts of the stock preparation area are...
1) Blending and furnish control 2) Control of consistency 3) Refining
1) Gravity section 2) Vacuum section 3) Press section
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
Disk refiners

2. Refining (Beating)
Rolling friction between surfaces
Refers to the weight per unit surface area (one side) of a paper sheet and is critical quality attribute
1) Plain 2) Blind drilled 3) Grooved ('vented') 4) Vacuum (suction) press
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

3. 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
Gets stock into the headbox
Refining
Consistency & flow rate

4. The 6 D's of Papermaking
1) Overall stock flow 2) Angle of flow 3) Speed of flow 4) Amount of flow at different points across the machine
The component makeup (recipe) of the sheet
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

5. What are the three main types of paper machine wet ends?
Refers to the weight per unit surface area (one side) of a paper sheet and is critical quality attribute
1) Gravity section 2) Vacuum section 3) Press section
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) Retention aids 2) Sizing agents 3) Fillers 4) Strength additives 5) Dyes & pigments 6) pH control additives 7) Specialty additives 8) Operational improvement additives

6. What are the types of press rolls?

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7. In order to control the basis weight of the sheet - the ____ and _____ of the streams must be measured and controlled
Gets stock into the headbox
Consistency & flow rate
1) Overall stock flow 2) Angle of flow 3) Speed of flow 4) Amount of flow at different points across the machine
Basis weight valve

8. What are the key functions of the headbox approach system?
Disk refiners
Drainage rate (freeness)
1) The wet end flow loop 2) The white water recirculation loop 3) The basis weight control loop
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

9. The headbox can be adjusted to control what?
Drainage rate (freeness)
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
Delivers stock onto the wire

10. How are papermaking fines produced?
1) Dose 2) Dilute 3) Disperse 4) Distribute 5) Dewater 6) Dry
1) The wet end flow loop 2) The white water recirculation loop 3) The basis weight control loop
Delivers stock onto the wire
When refining pulverizes the primary and outer secondary layers of the fiber wall

11. Basis Weight
Refining
All water used to dilute the thick stock is recovered from the wet end and used to dilute more stock
Refers to the weight per unit surface area (one side) of a paper sheet and is critical quality attribute
1) Blending and furnish control 2) Control of consistency 3) Refining

12. 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
(Wet tensile x 100 %)/Dry tensile
Disk refiners
1) Plain 2) Blind drilled 3) Grooved ('vented') 4) Vacuum (suction) press

13. The 'white water loop'
All water used to dilute the thick stock is recovered from the wet end and used to dilute more stock
Manifold
(Wet tensile x 100 %)/Dry tensile
Disk refiners

14. Consistency
1) The wet end flow loop 2) The white water recirculation loop 3) The basis weight control loop
Refers to the weight per unit surface area (one side) of a paper sheet and is critical quality attribute
The solids (dry) fraction of a papermaking slurry or pulp sample
Basis weight valve

15. Refining reduces the _______ of the stock
When refining pulverizes the primary and outer secondary layers of the fiber wall
Drainage rate (freeness)
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

16. Furnish
Manifold
The component makeup (recipe) of the sheet
1) Open 2) Air- padded 3) Hydraulic
Delivers stock onto the wire

17. Refining is done via ___________
(Wet tensile x 100 %)/Dry tensile
The solids (dry) fraction of a papermaking slurry or pulp sample
1) Gravity and light vacuum 2) Heavy vacuum 3) Mechanical pressure 4) Heat
Rolling friction between surfaces

18. Most modern refining is done using _____
Disk refiners
Consistency & flow rate
Manifold (distributor) & the actual headbox
When refining pulverizes the primary and outer secondary layers of the fiber wall

19. The headbox must distribute the stock evenly onto the ____
1) Dose 2) Dilute 3) Disperse 4) Distribute 5) Dewater 6) Dry
Delivers stock onto the wire
Wire
When refining pulverizes the primary and outer secondary layers of the fiber wall

20. What are the three types of headboxes?
The component makeup (recipe) of the sheet
1) Plain 2) Blind drilled 3) Grooved ('vented') 4) Vacuum (suction) press
1) Open 2) Air- padded 3) Hydraulic
Manifold (distributor) & the actual headbox

21. The headbox is actually made up of the _____ and the ______
Manifold (distributor) & the actual headbox
Rolling friction between surfaces
1) Gravity section 2) Vacuum section 3) Press section
(Wet tensile x 100 %)/Dry tensile

22. The _____ must get the same amount of fiber spread evenly across the headbox
The component makeup (recipe) of the sheet
When refining pulverizes the primary and outer secondary layers of the fiber wall
Manifold
Drainage rate (freeness)

23. Wet strength formula
Gets stock into the headbox
(Wet tensile x 100 %)/Dry tensile
1) Gravity and light vacuum 2) Heavy vacuum 3) Mechanical pressure 4) Heat
Basis weight valve

24. What does the headbox do?
Manifold (distributor) & the actual headbox
1) Open 2) Air- padded 3) Hydraulic
1) Plain 2) Blind drilled 3) Grooved ('vented') 4) Vacuum (suction) press
Delivers stock onto the wire

25. Strong - smooth - printable paper CANNOT be made without the use of _____
1) Overall stock flow 2) Angle of flow 3) Speed of flow 4) Amount of flow at different points across the machine
Refining
(Wet tensile x 100 %)/Dry tensile
1) Dose 2) Dilute 3) Disperse 4) Distribute 5) Dewater 6) Dry

26. What are the main forces used to remove water on a paper machine wet end?
Rolling friction between surfaces
Refers to the weight per unit surface area (one side) of a paper sheet and is critical quality attribute
1) Gravity section 2) Vacuum section 3) Press section
1) Gravity and light vacuum 2) Heavy vacuum 3) Mechanical pressure 4) Heat

27. Other names for the headbox approach system
1) The wet end flow loop 2) The white water recirculation loop 3) The basis weight control loop
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
Refining
1) Dose 2) Dilute 3) Disperse 4) Distribute 5) Dewater 6) Dry

28. The ____ is the 'gatekeeper' - it sets the basis weight 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
Basis weight valve
Wire
Drainage rate (freeness)