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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 'white water loop'
(Wet tensile x 100 %)/Dry tensile
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
The solids (dry) fraction of a papermaking slurry or pulp sample

2. The headbox is actually made up of the _____ and the ______
Manifold (distributor) & the actual headbox
Gets stock into the headbox
Disk refiners
Basis weight valve

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
Gets stock into the headbox
Basis weight valve

4. Consistency
The solids (dry) fraction of a papermaking slurry or pulp sample
1) Dose 2) Dilute 3) Disperse 4) Distribute 5) Dewater 6) Dry
Consistency & flow rate
1) Gravity section 2) Vacuum section 3) Press section

5. 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
Wire
(Wet tensile x 100 %)/Dry tensile
Disk refiners

6. The _____ must get the same amount of fiber spread evenly across the headbox
Manifold
Consistency & flow rate
1) Plain 2) Blind drilled 3) Grooved ('vented') 4) Vacuum (suction) press
Drainage rate (freeness)

7. 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
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
Refers to the weight per unit surface area (one side) of a paper sheet and is critical quality attribute

8. Wet strength formula
(Wet tensile x 100 %)/Dry tensile
1) Dose 2) Dilute 3) Disperse 4) Distribute 5) Dewater 6) Dry
Disk refiners
Drainage rate (freeness)

9. Strong - smooth - printable paper CANNOT be made without the use of _____
Refining
1) Blending and furnish control 2) Control of consistency 3) Refining
Refers to the weight per unit surface area (one side) of a paper sheet and is critical quality attribute
(Wet tensile x 100 %)/Dry tensile

10. Other names for the headbox approach system
Disk refiners
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
1) The wet end flow loop 2) The white water recirculation loop 3) The basis weight control loop

11. What are the three main types of paper machine wet ends?
Refining
1) Plain 2) Blind drilled 3) Grooved ('vented') 4) Vacuum (suction) press
Manifold
1) Gravity section 2) Vacuum section 3) Press section

12. In order to control the basis weight of the sheet - the ____ and _____ of the streams must be measured and controlled
1) Open 2) Air- padded 3) Hydraulic
(Wet tensile x 100 %)/Dry tensile
Consistency & flow rate
Basis weight valve

13. Three basic parts of the stock preparation area are...
Delivers stock onto the wire
When refining pulverizes the primary and outer secondary layers of the fiber wall
Wire
1) Blending and furnish control 2) Control of consistency 3) Refining

14. The headbox can be adjusted to control what?
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
1) Overall stock flow 2) Angle of flow 3) Speed of flow 4) Amount of flow at different points across the machine

15. Refining is done via ___________
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
All water used to dilute the thick stock is recovered from the wet end and used to dilute more stock
Rolling friction between surfaces
Consistency & flow rate

16. The headbox must distribute the stock evenly onto the ____
1) Overall stock flow 2) Angle of flow 3) Speed of flow 4) Amount of flow at different points across the machine
Wire
Manifold
When refining pulverizes the primary and outer secondary layers of the fiber wall

17. Furnish
Disk refiners
1) Dose 2) Dilute 3) Disperse 4) Distribute 5) Dewater 6) Dry
The component makeup (recipe) of the sheet
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

18. What are the three types of headboxes?
1) The wet end flow loop 2) The white water recirculation loop 3) The basis weight control loop
1) Gravity section 2) Vacuum section 3) Press section
1) Open 2) Air- padded 3) Hydraulic
When refining pulverizes the primary and outer secondary layers of the fiber wall

19. 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
When refining pulverizes the primary and outer secondary layers of the fiber wall
1) Dose 2) Dilute 3) Disperse 4) Distribute 5) Dewater 6) Dry
Refers to the weight per unit surface area (one side) of a paper sheet and is critical quality attribute

20. Basis Weight
1) Gravity and light vacuum 2) Heavy vacuum 3) Mechanical pressure 4) Heat
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
Refers to the weight per unit surface area (one side) of a paper sheet and is critical quality attribute

21. 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
Wire
Rolling friction between surfaces
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

22. Refining reduces the _______ of the stock
Drainage rate (freeness)
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
Delivers stock onto the wire

23. What does the manifold do?
Refining
Consistency & flow rate
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

24. 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
Drainage rate (freeness)
Wire
Rolling friction between surfaces

25. What are the types of press rolls?

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26. What does the headbox do?
Delivers stock onto the wire
1) Dose 2) Dilute 3) Disperse 4) Distribute 5) Dewater 6) Dry
Gets stock into the headbox
The component makeup (recipe) of the sheet

27. 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
1) Blending and furnish control 2) Control of consistency 3) Refining
Drainage rate (freeness)
Delivers stock onto the wire

28. The 6 D's of Papermaking
Basis weight valve
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
Manifold (distributor) & the actual headbox