Test your basic knowledge |

Paper Science Engineering Core Concepts

Instructions:

Answer 50 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 is the PRIMARY goal of pulping processes?
Liberation of Fibers.
Help retain fines and fillers.
37%
Linerboard and Corrugating medium.

2. Define Paper.
Mild chemical charge with chips - disk refine.
A web of cellulose fibers deposited from water suspension to form Hydrogen bonds.
(NaOH + Na2S)/OD fiber expressed as Na2O
Thermomechanical pulping

3. What are the steps of Mechanical Pulping?
Grinding and refining.
The measure of how freely water drains; aka the Drainage rate. Usually measured as Canadian Standard Freeness.
Liberation of Fibers.
Thermomechanical pulping

4. What percent of Paper and Board in the US is PRODUCED from RECYCLING?
37%
Burn strong black liquor - Convert heat to steam - Turn chemicals into smelt - Recover inorganics as Na2S and Na2CO3
Water - dissolved cellulose - hemicellulose - and lignin - and chemicals.
Protection.

5. How many times can a fiber be recycled before it is completely destroyed typically?
6 to 7 times.
Pressurized ground wood.
Hydrapulping - remove debris - maintain fibers.
D1: attack lignin E1: solubilize attacked lignin D2: break up lignin - start brightening E2: dissolve more lignin D3: attack chromophores - achieve final brightness

6. What are the three big steps to Chemical recovery?
1) Gravity 2) Vacuum 3) Press
37%
1) Evaptoration of Black Liquor 2) Incineration 3) Causticizing and Calcining
Produced in digester - separated with blow tank.

7. Name the primary purpose of the headbox.
To deliver stock on to the wire.
57%
Conduction.
Burn strong black liquor - Convert heat to steam - Turn chemicals into smelt - Recover inorganics as Na2S and Na2CO3

8. Define Market Pulp.
Water - dissolved cellulose - hemicellulose - and lignin - and chemicals.
Paper pulp sold on the open market for repulping.
365 million metric tons
Growth.

9. What are the layers of wood fiber - listed from innermost to outermost?
The amount of residual lignin in pulp after cooking.
Printing and writing.
Lumen - S3 Wall - S2 Wall - S1 Wall - P Wall - and middle lamela.
57%

10. What is the purpose of sizing additives?
Thermomechanical pulping
simple - no pulping required other than hyrdapulper.
Creates a strong - high quality - sheet that sells for a high price.
To enable paper to RESIST liquid penetration.

11. What is brownstock?
Brown pulp that is unbleached.
1) Open 2) Pressurized 3) Hydraulic
Newsprint - some Printing and writing - and coated publications.
Grinding and refining.

12. Disadvantages of recycled pulping?
655 and 98 lbs/year
Costly - weak product - mechanical damage to fibers - hornification.
Soda (NaOH) - Sulfite (SO2) - and Kraft (NaOH + Na2S).
Mechanical action to improve paper characteristics - such as strength.

13. What is a retention additive often used?
The Xylem - or trachea fibers.
polyacrylamide.
1) Fourdriner 2) Top-Wire former 3) Gap former
Pressurized ground wood.

14. What are some disadvantages of Chemical pulping?
Low yield - high chemical dosage required - high capital cost - requirement of recovery system - and darkens pulp.
Lumen - S3 Wall - S2 Wall - S1 Wall - P Wall - and middle lamela.
China - 105 AD
Mechanical action to improve paper characteristics - such as strength.

15. What are the 3 main components of wood and what percentage of wood do they make up?
Water - dissolved cellulose - hemicellulose - and lignin - and chemicals.
75%
(NaOH + half of Na2S)/OD fiber expressed as Na2O
Cellulose (50%) - Hemicellulose (25%) - and Lignin (25%).

16. What is freeness?
Chemi- thermo- mechanical pulping.
The measure of how freely water drains; aka the Drainage rate. Usually measured as Canadian Standard Freeness.
33% - 55% - and 8%
(NaOH + half of Na2S)/OD fiber expressed as Na2O

17. What does SGW mean?
Even stock spread - Level out cross currents and consistency variations level out MD velocity gradients - even flow - disperse flocs
Percent ISO.
Chemical - Semi- chemical - Mechanical - and Recycled.
Stone ground wood.

18. What are the 3 major grades of paper?
Cellulose (50%) - Hemicellulose (25%) - and Lignin (25%).
The amount of residual lignin in pulp after cooking.
Printing and Writing - Board - and Tissue.
Mild chemical charge with chips - disk refine.

19. Advantages of recycled pulping?
simple - no pulping required other than hyrdapulper.
1) Open 2) Pressurized 3) Hydraulic
Printing and writing.
Even stock spread - Level out cross currents and consistency variations level out MD velocity gradients - even flow - disperse flocs

20. What percent of Paper and Board in the US is RECOVERED each year?
57%
Treat chips with chemical dosage - heat to high temperature - and wash the chips of black liquor and remaining lignin.
Conduction.
High yield - simple - wood colored pulp - easy bleach - no chemical recovery.

21. What does PGW mean?
Cellulose (50%) - Hemicellulose (25%) - and Lignin (25%).
Brown pulp that is unbleached.
Starch.
Pressurized ground wood.

22. What is a common wet strength aid?
Corrugating Medium alone.
57%
Conduction.
Kymene.

23. What are the steps in Semi-Chemical Pulping?
Soda (NaOH) - Sulfite (SO2) - and Kraft (NaOH + Na2S).
Mild chemical charge with chips - disk refine.
The amount of residual lignin in pulp after cooking.
A web of cellulose fibers deposited from water suspension to form Hydrogen bonds.

24. What does ECF stand for?
Stone ground wood.
High yield - simple - wood colored pulp - easy bleach - no chemical recovery.
Chemi- thermo- mechanical pulping.
Environmentally Chlorine Free.

25. What does TCF stand for?
D1: attack lignin E1: solubilize attacked lignin D2: break up lignin - start brightening E2: dissolve more lignin D3: attack chromophores - achieve final brightness
Environmentally Chlorine Free.
Calcium carbonate.
Totally Chlorine Free.

26. List the 3 types of Wet end machines.
Printing and Writing - Board - and Tissue.
Calcium carbonate.
Treat chips with chemical dosage - heat to high temperature - and wash the chips of black liquor and remaining lignin.
1) Fourdriner 2) Top-Wire former 3) Gap former

27. What is the largest paperboard grade in the US by weight?
Treat chips with chemical dosage - heat to high temperature - and wash the chips of black liquor and remaining lignin.
Pressurized ground wood.
Chemical - Semi- chemical - Mechanical - and Recycled.
Unbleached Kraft

28. What are some products of Recycled Pulping?
Summerwood.
Corrugating medium - newsprint - some printing and writing grades.
57%
365 million metric tons

29. What are some products of Chemical pulping?
To deliver stock on to the wire.
Percent ISO.
Linerboard - Printing and writing paper - Food board - dissolving pulp.
Paper pulp sold on the open market for repulping.

30. The set up of Evaporators and how it saves steam economy.
Treat chips with chemical dosage - heat to high temperature - and wash the chips of black liquor and remaining lignin.
Even stock spread - Level out cross currents and consistency variations level out MD velocity gradients - even flow - disperse flocs
75%
Steam is saved by exposing the strongest - thickest - black liquor to the hottest steam first - in order to evaporate the most water efficiently.

31. What is the primary goal of bleaching?
Springwood.
Mechanical action to improve paper characteristics - such as strength.
6 to 7 times.
To improve brightness.

32. What is world production per year of paper/board?
365 million metric tons
Creates a strong - high quality - sheet that sells for a high price.
Steam is saved by exposing the strongest - thickest - black liquor to the hottest steam first - in order to evaporate the most water efficiently.
Springwood.

33. What is formation?
Springwood.
Even distribution of fibers; little flocs - blobs or clumps; no barring or streaking in either the MD or CD.
A web of cellulose fibers deposited from water suspension to form Hydrogen bonds.
(NaOH + half of Na2S)/OD fiber expressed as Na2O

34. What do fillers do?
Improve optical and physical properties of the sheet.
Lumen - S3 Wall - S2 Wall - S1 Wall - P Wall - and middle lamela.
D1: attack lignin E1: solubilize attacked lignin D2: break up lignin - start brightening E2: dissolve more lignin D3: attack chromophores - achieve final brightness
The measure of how freely water drains; aka the Drainage rate. Usually measured as Canadian Standard Freeness.

35. What is Sulfidity?
6 to 7 times.
(NaOH + Na2S)/OD fiber expressed as Na2O
Na2S/(NaOH + Na2S) expressed as a percent NaO
Newsprint - some Printing and writing - and coated publications.

36. What happens during refining?
Printing and writing.
High yield - simple - wood colored pulp - easy bleach - no chemical recovery.
Collapse of ribbons in fibers - Fibrillization of outer surface - Production of fines - reduction of freeness value - Shorter - flexible - fibers are achieved - Burst and tensile strength improve - tear strength goes down
Hydrapulping - remove debris - maintain fibers.

37. What are the three types of chemical pulping?
Creates a strong - high quality - sheet that sells for a high price.
Soda (NaOH) - Sulfite (SO2) - and Kraft (NaOH + Na2S).
Treat chips with chemical dosage - heat to high temperature - and wash the chips of black liquor and remaining lignin.
85 million metric tons

38. What does the Kappa number indicate?
The amount of residual lignin in pulp after cooking.
D1: attack lignin E1: solubilize attacked lignin D2: break up lignin - start brightening E2: dissolve more lignin D3: attack chromophores - achieve final brightness
Poor bonding - yellow coloration - high energy costs.
(NaOH + Na2S)/OD fiber expressed as Na2O

39. Where is black liquor produced and how is it seperated from the pulp?
Growth.
Produced in digester - separated with blow tank.
To deliver stock on to the wire.
25%

40. What is the function of Bark?
polyacrylamide.
Corrugating medium - newsprint - some printing and writing grades.
Protection.
Na2S/(NaOH + Na2S) expressed as a percent NaO

41. What is common filler?
33% - 55% - and 8%
Conduction.
High yield - low cost - simple.
Calcium carbonate.

42. What percentage of US production do P&W - Board - and Tissue compose?
High yield - low cost - simple.
33% - 55% - and 8%
Na2S/(NaOH + Na2S) expressed as a percent NaO
Newsprint - some Printing and writing - and coated publications.

43. What two ways is kraft pulping performed?
The Xylem - or trachea fibers.
batch and continuous.
simple - no pulping required other than hyrdapulper.
Newsprint - some Printing and writing - and coated publications.

44. What does TMP mean?
Thermomechanical pulping
Brown pulp that is unbleached.
Treat chips with chemical dosage - heat to high temperature - and wash the chips of black liquor and remaining lignin.
High quality - adaptable - and simple.

45. What are the jobs of the Recovery Boiler?
Burn strong black liquor - Convert heat to steam - Turn chemicals into smelt - Recover inorganics as Na2S and Na2CO3
25%
Stone ground wood.
The Xylem - or trachea fibers.

46. What is the single product of Semi- chemical pulping?
D1: attack lignin E1: solubilize attacked lignin D2: break up lignin - start brightening E2: dissolve more lignin D3: attack chromophores - achieve final brightness
simple - no pulping required other than hyrdapulper.
Grinding and refining.
Corrugating Medium alone.

47. What are some sizing additives?
Costly - weak product - mechanical damage to fibers - hornification.
ASA and AKD for Alkaline paper or Rosin and Alum for Acid Linerboard.
A web of cellulose fibers deposited from water suspension to form Hydrogen bonds.
Springwood.

48. What sets Semi-Chemical pulping apart from Chemical Pulping?
(NaOH + half of Na2S)/OD fiber expressed as Na2O
The goal is to remove some lignin between the cell walls - but maintain stiffness.
Paper pulp sold on the open market for repulping.
Soda (NaOH) - Sulfite (SO2) - and Kraft (NaOH + Na2S).

49. What are the advantages of Kraft pulping?
High quality - adaptable - and simple.
Corrugating Medium alone.
To enable paper to RESIST liquid penetration.
Printing and Writing - Board - and Tissue.

50. What do the stages in DEDED do?
Poor bonding - yellow coloration - high energy costs.
Low yield - high chemical dosage required - high capital cost - requirement of recovery system - and darkens pulp.
D1: attack lignin E1: solubilize attacked lignin D2: break up lignin - start brightening E2: dissolve more lignin D3: attack chromophores - achieve final brightness
57%

Can you answer 50 questions in 15 minutes?

Major Subjects
Tests & Exams AP CLEP DSST GRE SAT GMAT	Certifications CISSP go to https://www.isc2.org/ PMP ITIL RHCE MCTS More...	IT Skills Android Programming Data Modeling Objective C Programming Basic Python Programming Adobe Illustrator More...	Business Skills Advertising Techniques Business Accounting Basics Business Strategy Human Resource Management Marketing Basics More...
Soft Skills Body Language People Skills Public Speaking Persuasion Job Hunting And Resumes More...	Vocabulary GRE Vocab SAT Vocab TOEFL Essential Vocab Basic English Words For All Global Words You Should Know Business English More...	Languages AP German Vocab AP Latin Vocab SAT Subject Test: French Italian Survival Norwegian Survival More...	Engineering Audio Engineering Computer Science Engineering Aerospace Engineering Chemical Engineering Structural Engineering More...
Health Sciences Basic Nursing Skills Health Science Language Fundamentals Veterinary Technology Medical Language Cardiology Clinical Surgery More...	English Grammar Fundamentals Literary And Rhetorical Vocab Elements Of Style Vocab Introduction To English Major Complete Advanced Sentences Literature Homonyms More...	Math Algebra Formulas Basic Arithmetic: Measurements Metric Conversions Geometric Properties Important Math Facts Number Sense Vocab Business Math More...	Other Major Subjects Science Economics History Law Performing-arts Cooking Logic & Reasoning Trivia

Test your basic knowledge |

Paper Science Engineering Core Concepts

Can you answer 50 questions in 15 minutes?

Let me suggest you:

Browse all subjects

Browse all tests

Most popular tests

Major Subjects

Tests & Exams

Certifications

IT Skills

Business Skills

Soft Skills

Vocabulary

Languages

Engineering

Health Sciences

English

Math

Other Major Subjects

Browse all subjects

Browse all tests

Most popular tests