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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. Wet strength formula
(Wet tensile x 100 %)/Dry tensile
1) Dose 2) Dilute 3) Disperse 4) Distribute 5) Dewater 6) Dry
Consistency & flow rate
Delivers stock onto the wire

2. Refining is done via ___________
(Wet tensile x 100 %)/Dry tensile
Disk refiners
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
Rolling friction between surfaces

3. What are the key functions of the headbox approach system?
Disk refiners
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
Wire
Drainage rate (freeness)

4. The ____ is the 'gatekeeper' - it sets the basis weight of the sheet
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
Basis weight valve
Rolling friction between surfaces

5. Refining reduces the _______ of the stock
Delivers stock onto the wire
Refining
Consistency & flow rate
Drainage rate (freeness)

6. Strong - smooth - printable paper CANNOT be made without the use of _____
Basis weight valve
1) Overall stock flow 2) Angle of flow 3) Speed of flow 4) Amount of flow at different points across the machine
Refining
The solids (dry) fraction of a papermaking slurry or pulp sample

7. What are the types of press rolls?

8. The headbox can be adjusted to control what?
1) Blending and furnish control 2) Control of consistency 3) Refining
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
Gets stock into the headbox

9. In order to control the basis weight of the sheet - the ____ and _____ of the streams must be measured and controlled
Manifold (distributor) & the actual headbox
The component makeup (recipe) of the sheet
Consistency & flow rate
Manifold

10. The _____ must get the same amount of fiber spread evenly across the headbox
1) Overall stock flow 2) Angle of flow 3) Speed of flow 4) Amount of flow at different points across the machine
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
Manifold
1) Gravity and light vacuum 2) Heavy vacuum 3) Mechanical pressure 4) Heat

11. Refining (Beating)
1) Gravity section 2) Vacuum section 3) Press section
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

12. Basis Weight
Refers to the weight per unit surface area (one side) of a paper sheet and is critical quality attribute
1) Gravity and light vacuum 2) Heavy vacuum 3) Mechanical pressure 4) Heat
The solids (dry) fraction of a papermaking slurry or pulp sample
When refining pulverizes the primary and outer secondary layers of the fiber wall

13. Furnish
1) Gravity section 2) Vacuum section 3) Press section
Delivers stock onto the wire
The component makeup (recipe) of the sheet
Disk refiners

14. The 'white water loop'
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
Delivers stock onto the wire
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

15. 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
Wire
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

16. 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) Blending and furnish control 2) Control of consistency 3) Refining
Consistency & flow rate
Refers to the weight per unit surface area (one side) of a paper sheet and is critical quality attribute

17. Most modern refining is done using _____
(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
Disk refiners
1) Dose 2) Dilute 3) Disperse 4) Distribute 5) Dewater 6) Dry

18. What does the manifold do?
1) The wet end flow loop 2) The white water recirculation loop 3) The basis weight control loop
Rolling friction between surfaces
Wire
Gets stock into the headbox

19. 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
1) Open 2) Air- padded 3) Hydraulic
The solids (dry) fraction of a papermaking slurry or pulp sample
1) Dose 2) Dilute 3) Disperse 4) Distribute 5) Dewater 6) Dry

20. The headbox must distribute the stock evenly onto the ____
1) Dose 2) Dilute 3) Disperse 4) Distribute 5) Dewater 6) Dry
Wire
The component makeup (recipe) of the sheet
1) Blending and furnish control 2) Control of consistency 3) Refining

21. Three basic parts of the stock preparation area are...
1) Blending and furnish control 2) Control of consistency 3) Refining
Consistency & flow rate
1) Plain 2) Blind drilled 3) Grooved ('vented') 4) Vacuum (suction) press
(Wet tensile x 100 %)/Dry tensile

22. What does the headbox do?
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
Delivers stock onto the wire
The solids (dry) fraction of a papermaking slurry or pulp sample

23. What are the three main types of paper machine wet ends?
Rolling friction between surfaces
1) Gravity section 2) Vacuum section 3) Press section
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
Disk refiners

24. How are papermaking fines produced?
When refining pulverizes the primary and outer secondary layers of the fiber wall
Manifold (distributor) & the actual headbox
Refers to the weight per unit surface area (one side) of a paper sheet and is critical quality attribute
1) Open 2) Air- padded 3) Hydraulic

25. What are the three types of headboxes?
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
When refining pulverizes the primary and outer secondary layers of the fiber wall
1) Open 2) Air- padded 3) Hydraulic
1) Gravity and light vacuum 2) Heavy vacuum 3) Mechanical pressure 4) Heat

26. The 6 D's of 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
1) Dose 2) Dilute 3) Disperse 4) Distribute 5) Dewater 6) Dry
1) Gravity and light vacuum 2) Heavy vacuum 3) Mechanical pressure 4) Heat
Disk refiners

27. Consistency
The solids (dry) fraction of a papermaking slurry or pulp sample
Basis weight valve
(Wet tensile x 100 %)/Dry tensile
Gets stock into the headbox

28. The headbox is actually made up of the _____ and the ______
Wire
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
Manifold (distributor) & the actual headbox
Basis weight valve