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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. Refining is done via ___________
Refining
Rolling friction between surfaces
Delivers stock onto the wire
Basis weight valve

2. The ____ is the 'gatekeeper' - it sets the basis weight of the sheet
1) Overall stock flow 2) Angle of flow 3) Speed of flow 4) Amount of flow at different points across the machine
1) The wet end flow loop 2) The white water recirculation loop 3) The basis weight control loop
Consistency & flow rate
Basis weight valve

3. What are the types of press rolls?

4. Basis Weight
Manifold
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
Rolling friction between surfaces

5. 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 (distributor) & the actual headbox
Refining
1) Overall stock flow 2) Angle of flow 3) Speed of flow 4) Amount of flow at different points across the machine

6. Three basic parts of the stock preparation area are...
The solids (dry) fraction of a papermaking slurry or pulp sample
Rolling friction between surfaces
1) Blending and furnish control 2) Control of consistency 3) Refining
Manifold (distributor) & the actual headbox

7. 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
(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
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

8. In order to control the basis weight of the sheet - the ____ and _____ of the streams must be measured and controlled
Rolling friction between surfaces
1) Plain 2) Blind drilled 3) Grooved ('vented') 4) Vacuum (suction) press
Manifold
Consistency & flow rate

9. How are papermaking fines produced?
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
Rolling friction between surfaces
When refining pulverizes the primary and outer secondary layers of the fiber wall

10. What does the headbox do?
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
Delivers stock onto the wire
Manifold (distributor) & the actual headbox

11. Most modern refining is done using _____
1) Blending and furnish control 2) Control of consistency 3) Refining
Disk refiners
1) Gravity section 2) Vacuum section 3) Press section
1) Gravity and light vacuum 2) Heavy vacuum 3) Mechanical pressure 4) Heat

12. Refining (Beating)
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) Blending and furnish control 2) Control of consistency 3) Refining
All water used to dilute the thick stock is recovered from the wet end and used to dilute more stock

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

14. What are the three main types of paper machine wet ends?
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
1) Open 2) Air- padded 3) Hydraulic
Drainage rate (freeness)

15. Strong - smooth - printable paper CANNOT be made without the use of _____
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
Gets stock into the headbox
The component makeup (recipe) of the sheet

16. What does the manifold do?
Basis weight valve
1) Gravity and light vacuum 2) Heavy vacuum 3) Mechanical pressure 4) Heat
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

17. 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
The solids (dry) fraction of a papermaking slurry or pulp sample
Manifold (distributor) & the actual headbox
1) Dose 2) Dilute 3) Disperse 4) Distribute 5) Dewater 6) Dry

18. 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
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
Refers to the weight per unit surface area (one side) of a paper sheet and is critical quality attribute

19. The 6 D's of Papermaking
Consistency & flow rate
Gets stock into the headbox
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) Dose 2) Dilute 3) Disperse 4) Distribute 5) Dewater 6) Dry

20. Wet strength formula
(Wet tensile x 100 %)/Dry tensile
Wire
All water used to dilute the thick stock is recovered from the wet end and used to dilute more stock
The component makeup (recipe) of the sheet

21. Refining reduces the _______ of the stock
Refining
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
Drainage rate (freeness)

22. What are the basic categories/types of additives used for papermaking?
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
Drainage rate (freeness)

23. Furnish
(Wet tensile x 100 %)/Dry tensile
1) Dose 2) Dilute 3) Disperse 4) Distribute 5) Dewater 6) Dry
1) Open 2) Air- padded 3) Hydraulic
The component makeup (recipe) of the sheet

24. The headbox can be adjusted to control what?
Manifold (distributor) & the actual headbox
When refining pulverizes the primary and outer secondary layers of the fiber wall
1) Overall stock flow 2) Angle of flow 3) Speed of flow 4) Amount of flow at different points across the machine
Drainage rate (freeness)

25. The headbox is actually made up of the _____ and the ______
Manifold (distributor) & the actual headbox
Refining
Delivers stock onto the wire
All water used to dilute the thick stock is recovered from the wet end and used to dilute more stock

26. The _____ must get the same amount of fiber spread evenly across the headbox
1) Blending and furnish control 2) Control of consistency 3) Refining
Rolling friction between surfaces
Manifold
Manifold (distributor) & the actual headbox

27. What are the three types of headboxes?
1) Open 2) Air- padded 3) Hydraulic
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
Rolling friction between surfaces
Manifold (distributor) & the actual headbox

28. The headbox must distribute the stock evenly onto the ____
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
Refers to the weight per unit surface area (one side) of a paper sheet and is critical quality attribute
Manifold (distributor) & the actual headbox
Wire