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. Light rings in wood are known as what?
(NaOH + Na2S)/OD fiber expressed as Na2O
Paper pulp sold on the open market for repulping.
ASA and AKD for Alkaline paper or Rosin and Alum for Acid Linerboard.
Springwood.

2. What are some disadvantages of Chemical pulping?
Linerboard - Printing and writing paper - Food board - dissolving pulp.
Low yield - high chemical dosage required - high capital cost - requirement of recovery system - and darkens pulp.
75%
365 million metric tons

3. What is the single product of Semi- chemical pulping?
Chemical - Semi- chemical - Mechanical - and Recycled.
Environmentally Chlorine Free.
Corrugating Medium alone.
Water - dissolved cellulose - hemicellulose - and lignin - and chemicals.

4. Where is black liquor produced and how is it seperated from the pulp?
Brown pulp that is unbleached.
Produced in digester - separated with blow tank.
Summerwood.
655 and 98 lbs/year

5. When and where was paper invented?
365 million metric tons
Relation of rate to time - also involving temperature. Tells how long to cook chips.
China - 105 AD
Newsprint - some Printing and writing - and coated publications.

6. What are some sizing additives?
Kymene.
Printing and writing.
Summerwood.
ASA and AKD for Alkaline paper or Rosin and Alum for Acid Linerboard.

7. What are the layers of wood fiber - listed from innermost to outermost?
Lumen - S3 Wall - S2 Wall - S1 Wall - P Wall - and middle lamela.
Pressurized ground wood.
Low yield - high chemical dosage required - high capital cost - requirement of recovery system - and darkens pulp.
Corrugating medium - newsprint - some printing and writing grades.

8. The set up of Evaporators and how it saves steam economy.
Steam is saved by exposing the strongest - thickest - black liquor to the hottest steam first - in order to evaporate the most water efficiently.
Stone ground wood.
Treat chips with chemical dosage - heat to high temperature - and wash the chips of black liquor and remaining lignin.
Linerboard - Printing and writing paper - Food board - dissolving pulp.

9. What happens during refining?
6 to 7 times.
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
The Xylem - or trachea fibers.
1) Evaptoration of Black Liquor 2) Incineration 3) Causticizing and Calcining

10. List the 3 types of headboxes.
1) Open 2) Pressurized 3) Hydraulic
85 million metric tons
China - 105 AD
Mild chemical charge with chips - disk refine.

11. What do fillers do?
Improve optical and physical properties of the sheet.
Starch.
Totally Chlorine Free.
1) Evaptoration of Black Liquor 2) Incineration 3) Causticizing and Calcining

12. What are the steps to recycled pulping?
75%
Corrugating medium - newsprint - some printing and writing grades.
polyacrylamide.
Hydrapulping - remove debris - maintain fibers.

13. What two ways is kraft pulping performed?
batch and continuous.
Conduction.
polyacrylamide.
Brown pulp that is unbleached.

14. What are some advantages of Semi- chemical pulping?
polyacrylamide.
High yield - low cost - simple.
1) Fourdriner 2) Top-Wire former 3) Gap former
25%

15. What does TCF stand for?
Totally Chlorine Free.
Printing and writing.
Summerwood.
6 to 7 times.

16. What two types of paperboard are in a typical box?
China - 105 AD
Environmentally Chlorine Free.
The measure of how freely water drains; aka the Drainage rate. Usually measured as Canadian Standard Freeness.
Linerboard and Corrugating medium.

17. Advantages of recycled pulping?
simple - no pulping required other than hyrdapulper.
Springwood.
D1: attack lignin E1: solubilize attacked lignin D2: break up lignin - start brightening E2: dissolve more lignin D3: attack chromophores - achieve final brightness
33% - 55% - and 8%

18. What is the per capita paper consumption for the US and China - respectively?
ASA and AKD for Alkaline paper or Rosin and Alum for Acid Linerboard.
655 and 98 lbs/year
(NaOH + half of Na2S)/OD fiber expressed as Na2O
25%

19. How much Paper/Board is produced in the US a year?
Printing and writing.
Linerboard and Corrugating medium.
(NaOH + half of Na2S)/OD fiber expressed as Na2O
85 million metric tons

20. What part of wood largely goes into paper?
37%
Produced in digester - separated with blow tank.
Treat chips with chemical dosage - heat to high temperature - and wash the chips of black liquor and remaining lignin.
The Xylem - or trachea fibers.

21. What percentage of the average P&W sheet is Softwood?
75%
25%
Liberation of Fibers.
Pulp sold to manufacturers of absorbent products - such as diapers.

22. What does TMP mean?
Calcium carbonate.
Thermomechanical pulping
(NaOH + Na2S)/OD fiber expressed as Na2O
The goal is to remove some lignin between the cell walls - but maintain stiffness.

23. What do the stages in DEDED do?
D1: attack lignin E1: solubilize attacked lignin D2: break up lignin - start brightening E2: dissolve more lignin D3: attack chromophores - achieve final brightness
ASA and AKD for Alkaline paper or Rosin and Alum for Acid Linerboard.
Burn strong black liquor - Convert heat to steam - Turn chemicals into smelt - Recover inorganics as Na2S and Na2CO3
Mild chemical charge with chips - disk refine.

24. What are the products of Mechanical Pulping?
batch and continuous.
Liberation of Fibers.
Corrugating Medium alone.
Newsprint - some Printing and writing - and coated publications.

25. What are some strength additives?
Stone ground wood.
Burn strong black liquor - Convert heat to steam - Turn chemicals into smelt - Recover inorganics as Na2S and Na2CO3
Starch.
Totally Chlorine Free.

26. What percent of Paper and Board in the US is RECOVERED each year?
57%
ASA and AKD for Alkaline paper or Rosin and Alum for Acid Linerboard.
1) Fourdriner 2) Top-Wire former 3) Gap former
To improve brightness.

27. Name the primary purpose of the headbox.
To deliver stock on to the wire.
Environmentally Chlorine Free.
Even distribution of fibers; little flocs - blobs or clumps; no barring or streaking in either the MD or CD.
25%

28. What are the steps of Mechanical Pulping?
75%
Grinding and refining.
The measure of how freely water drains; aka the Drainage rate. Usually measured as Canadian Standard Freeness.
Even stock spread - Level out cross currents and consistency variations level out MD velocity gradients - even flow - disperse flocs

29. Dark rings in wood are known as what?
Growth.
Summerwood.
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
D1: attack lignin E1: solubilize attacked lignin D2: break up lignin - start brightening E2: dissolve more lignin D3: attack chromophores - achieve final brightness

30. What is the function of the Cambium?
Costly - weak product - mechanical damage to fibers - hornification.
Costly chemical recovery - only used for corrugating medium production.
75%
Growth.

31. What does the Kappa number indicate?
1) Evaptoration of Black Liquor 2) Incineration 3) Causticizing and Calcining
Chemical - Semi- chemical - Mechanical - and Recycled.
The Xylem - or trachea fibers.
The amount of residual lignin in pulp after cooking.

32. What are the steps in Semi-Chemical Pulping?
25%
Mild chemical charge with chips - disk refine.
1) Gravity 2) Vacuum 3) Press
Water - dissolved cellulose - hemicellulose - and lignin - and chemicals.

33. What is the largest paper grade in the US by weight?
25%
Printing and writing.
Mechanical action to improve paper characteristics - such as strength.
A web of cellulose fibers deposited from water suspension to form Hydrogen bonds.

34. What percent of Paper and Board in the US is PRODUCED from RECYCLING?
Springwood.
(NaOH + half of Na2S)/OD fiber expressed as Na2O
37%
Protection.

35. What percentage of the average P&W sheet is Hardwood?
75%
365 million metric tons
Springwood.
Costly chemical recovery - only used for corrugating medium production.

36. What are the four broad categories of pulping?
Grinding and refining.
Chemical - Semi- chemical - Mechanical - and Recycled.
The goal is to remove some lignin between the cell walls - but maintain stiffness.
Na2S/(NaOH + Na2S) expressed as a percent NaO

37. List the 3 types of Wet end machines.
ASA and AKD for Alkaline paper or Rosin and Alum for Acid Linerboard.
The measure of how freely water drains; aka the Drainage rate. Usually measured as Canadian Standard Freeness.
1) Fourdriner 2) Top-Wire former 3) Gap former
Chemi- thermo- mechanical pulping.

38. What does PGW mean?
37%
ASA and AKD for Alkaline paper or Rosin and Alum for Acid Linerboard.
Unbleached Kraft
Pressurized ground wood.

39. What is brownstock?
Liberation of Fibers.
Summerwood.
Brown pulp that is unbleached.
Stone ground wood.

40. What are some advantages of Chemical pulping?
Creates a strong - high quality - sheet that sells for a high price.
The goal is to remove some lignin between the cell walls - but maintain stiffness.
Kymene.
batch and continuous.

41. What sets Semi-Chemical pulping apart from Chemical Pulping?
High yield - low cost - simple.
The measure of how freely water drains; aka the Drainage rate. Usually measured as Canadian Standard Freeness.
The goal is to remove some lignin between the cell walls - but maintain stiffness.
High quality - adaptable - and simple.

42. What is formation?
85 million metric tons
Costly - weak product - mechanical damage to fibers - hornification.
Even distribution of fibers; little flocs - blobs or clumps; no barring or streaking in either the MD or CD.
Growth.

43. Define Paper.
(NaOH + half of Na2S)/OD fiber expressed as Na2O
Linerboard - Printing and writing paper - Food board - dissolving pulp.
85 million metric tons
A web of cellulose fibers deposited from water suspension to form Hydrogen bonds.

44. What are the 3 major grades of paper?
Linerboard and Corrugating medium.
Printing and Writing - Board - and Tissue.
57%
China - 105 AD

45. What do retention aids do?
Help retain fines and fillers.
365 million metric tons
Produced in digester - separated with blow tank.
To deliver stock on to the wire.

46. Disadvantages of recycled pulping?
Environmentally Chlorine Free.
Costly - weak product - mechanical damage to fibers - hornification.
The Xylem - or trachea fibers.
(NaOH + Na2S)/OD fiber expressed as Na2O

47. What is freeness?
25%
The measure of how freely water drains; aka the Drainage rate. Usually measured as Canadian Standard Freeness.
6 to 7 times.
655 and 98 lbs/year

48. What is the PRIMARY goal of pulping processes?
1) Evaptoration of Black Liquor 2) Incineration 3) Causticizing and Calcining
Liberation of Fibers.
Help retain fines and fillers.
batch and continuous.

49. What is the primary goal of bleaching?
Liberation of Fibers.
polyacrylamide.
To improve brightness.
Costly chemical recovery - only used for corrugating medium production.

50. What does ECF stand for?
Grinding and refining.
Environmentally Chlorine Free.
To enable paper to RESIST liquid penetration.
Stone ground wood.

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