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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. What are the main forces used to remove water on a paper machine wet end?
Basis weight valve
1) Gravity and light vacuum 2) Heavy vacuum 3) Mechanical pressure 4) Heat
Manifold (distributor) & the actual headbox
When refining pulverizes the primary and outer secondary layers of the fiber wall

2. What does the manifold do?
1) Plain 2) Blind drilled 3) Grooved ('vented') 4) Vacuum (suction) press
Basis weight valve
1) Gravity and light vacuum 2) Heavy vacuum 3) Mechanical pressure 4) Heat
Gets stock into the headbox

3. Consistency
The solids (dry) fraction of a papermaking slurry or pulp sample
Refers to the weight per unit surface area (one side) of a paper sheet and is critical quality attribute
Consistency & flow rate
Drainage rate (freeness)

4. What are the three types of headboxes?
Delivers stock onto the wire
1) Open 2) Air- padded 3) Hydraulic
When refining pulverizes the primary and outer secondary layers of the fiber wall
(Wet tensile x 100 %)/Dry tensile

5. Refining (Beating)
1) Plain 2) Blind drilled 3) Grooved ('vented') 4) Vacuum (suction) press
Delivers stock onto the wire
Manifold (distributor) & the actual 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

6. The ____ is the 'gatekeeper' - it sets the basis weight of the sheet
1) Blending and furnish control 2) Control of consistency 3) Refining
Wire
Basis weight valve
When refining pulverizes the primary and outer secondary layers of the fiber wall

7. The 6 D's of Papermaking
1) Open 2) Air- padded 3) Hydraulic
1) Gravity and light vacuum 2) Heavy vacuum 3) Mechanical pressure 4) Heat
1) Dose 2) Dilute 3) Disperse 4) Distribute 5) Dewater 6) Dry
Delivers stock onto the wire

8. What does the headbox do?
Refers to the weight per unit surface area (one side) of a paper sheet and is critical quality attribute
Delivers stock onto the wire
1) Dose 2) Dilute 3) Disperse 4) Distribute 5) Dewater 6) Dry
All water used to dilute the thick stock is recovered from the wet end and used to dilute more stock

9. Refining is done via ___________
(Wet tensile x 100 %)/Dry tensile
When refining pulverizes the primary and outer secondary layers of the fiber wall
Refining
Rolling friction between surfaces

10. Most modern refining is done using _____
1) Gravity section 2) Vacuum section 3) Press section
Disk refiners
Basis weight valve
Manifold (distributor) & the actual headbox

11. In order to control the basis weight of the sheet - the ____ and _____ of the streams must be measured and controlled
Consistency & flow rate
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) Gravity and light vacuum 2) Heavy vacuum 3) Mechanical pressure 4) Heat
All water used to dilute the thick stock is recovered from the wet end and used to dilute more stock

12. Strong - smooth - printable paper CANNOT be made without the use of _____
Refining
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
The solids (dry) fraction of a papermaking slurry or pulp sample

13. Refining reduces the _______ of the stock
Drainage rate (freeness)
The component makeup (recipe) of the sheet
Manifold
(Wet tensile x 100 %)/Dry tensile

14. What are the types of press rolls?

15. Three basic parts of the stock preparation area are...
Refers to the weight per unit surface area (one side) of a paper sheet and is critical quality attribute
The component makeup (recipe) of the sheet
Rolling friction between surfaces
1) Blending and furnish control 2) Control of consistency 3) Refining

16. What are the basic categories/types of additives used for papermaking?
The component makeup (recipe) of the sheet
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
Consistency & flow rate

17. Wet strength formula
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
All water used to dilute the thick stock is recovered from the wet end and used to dilute more stock
Wire

18. The 'white water loop'
1) The wet end flow loop 2) The white water recirculation loop 3) The basis weight control 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
When refining pulverizes the primary and outer secondary layers of the fiber wall

19. Furnish
Gets stock into the headbox
The solids (dry) fraction of a papermaking slurry or pulp sample
The component makeup (recipe) of the sheet
Rolling friction between surfaces

20. The headbox is actually made up of the _____ and the ______
Gets stock into the headbox
Refining
Drainage rate (freeness)
Manifold (distributor) & the actual headbox

21. What are the three main types of paper machine wet ends?
The component makeup (recipe) of the sheet
1) Gravity section 2) Vacuum section 3) Press section
The solids (dry) fraction of a papermaking slurry or pulp sample
When refining pulverizes the primary and outer secondary layers of the fiber wall

22. What are the key functions of the headbox approach system?
(Wet tensile x 100 %)/Dry tensile
Gets stock into the headbox
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

23. The _____ must get the same amount of fiber spread evenly across the headbox
Manifold
Basis weight valve
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

24. Other names for the headbox approach system
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
Basis weight valve
Drainage rate (freeness)

25. The headbox can be adjusted to control what?
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
1) Plain 2) Blind drilled 3) Grooved ('vented') 4) Vacuum (suction) press
Consistency & flow rate

26. Basis Weight
Gets stock into the headbox
Delivers stock onto the wire
1) Gravity and light vacuum 2) Heavy vacuum 3) Mechanical pressure 4) Heat
Refers to the weight per unit surface area (one side) of a paper sheet and is critical quality attribute

27. The headbox must distribute the stock evenly onto the ____
Wire
1) Gravity and light vacuum 2) Heavy vacuum 3) Mechanical pressure 4) Heat
All water used to dilute the thick stock is recovered from the wet end and used to dilute more stock
Delivers stock onto the wire

28. How are papermaking fines produced?
Delivers stock onto the wire
1) Plain 2) Blind drilled 3) Grooved ('vented') 4) Vacuum (suction) press
When refining pulverizes the primary and outer secondary layers of the fiber wall
Basis weight valve