Pulp and Paper Technology / Printing Technology PDF

Paper Technology / Printing Technology

Q 1. What is the percentage, bark comprises of in a tree stem?
Answer: a) 10% – 20%
Q 2. What are some high level non-process elements which interfere in the recovery process?
Answer: c) Silica and Calcium
Q 3. Whole tree ___ in the forest requires cleaning before pulping to remove dirt.
Answer: d) Chipping
Q 4. What does the outer bark contain?
Answer: a) Suberin
Q 5. What is the specific gravity of the bark in usual cases?
Answer: b) 0.40 – 0.65
Q 6. Where is Sapwood located in the structure of softwood stem?
Answer: a) Below Inner Bark
Q 7. What type of trees are also called deciduous?
Answer: b) Hardwood
Q 8. What are openings on the radial surface known as?
Answer: a) Pits
Q 9. What is solid wood density, practically?
Answer: a) Specific gravity of wood x Density of water
Q 10. What are some important pulping variables of wood and wood chip?
Answer: a) Bark content
Q 11. What caused the diminished use of Sawdust?
Answer: a) Saw blades have become thinner with more teeth
Q 12. Mechanical dis-integrated wood pieces are of size ___________ along the grain.
Answer: a) 12–25 mm
Q 13. Bark, dirt and other materials should always be kept to a minimum of____________
Answer: b) 0.5% or less
Q 14. Where are Silos located?
Answer: c) Under pile of wood chips
Q 15. Whole tree chips undergo cleaning operation prior to the use.
Answer: a) True
Q 16. Which of the following is an example of residual chips?
Answer: d) Sawdust
Q 17. Which is the closest average fiber length for a 12mm long chip from Douglas fiber?
Answer: c) 3 mm
Q 18. What is the closest percentage of wood received as chip waste from primary wood process and what percentage is chipped on site?
Answer: a) 40% and 60%
Q 19. One method used for metering the wood chips into the digesters without constant supervision is with the use of chip silos of capacity __________
Answer: d) 50–300 tons
Q 20. Fuel value of softwood is less than hardwood.
Answer: b) False
Q 21. What is the purpose of barker?
Answer: b) Remove bark from wood before chipping
Q 22. What type of barker is this?
Answer: a) Drum
Q 23. A dam controls log retention time in drum barker.
Answer: a) True
Q 24. Which type of barker is ideal for small mills.
Answer: c) Rosserhead
Q 25. Waste water from hydraulic barker is higher in ______________
Answer: d) BOD
Q 26. Which are the two types of barkers in the following?
Answer: c) Flail
Q 27. Is Softwood easier to chip and generate fewer fine chips?
Answer: a) True
Q 28. Arrange this in proper downward order
Answer: a) Oversized – Over thick – Accepts – Pins – Fines
Q 29. _____________ are the chip fraction of the ideal size distribution analysis perfect for pulping.
Answer: b) Accepts
Q 30. At the bottom of the pass __________ are collected?
Answer: a) Fines
Q 31. About 80% of all waste paper comes from corrugated boxes, newspapers and office papers.
Answer: a) True
Q 32. About 10% of fiber is utilized to make paper each year worldwide is from non-wood plant fibers.
Answer: a) True
Q 33. Cotton is the pure form of __________
Answer: c) Cellulose
Q 34. Which of the following is a fiber mat made using synthetic fibers?
Answer: d) Nonwovens
Q 35. What is sugar cane residue called?
Answer: c) Bagasse
Q 36. Pulp from bamboo is utilized in fine papers and the resulting paper is __ than paper of straw pulp.
Answer: b) Stronger
Q 37. ____________ are utilized in products such as battery separators, glass fiber filter mats.
Answer: a) Glass fibers
Q 38. Straw should not be utilized because?
Answer: c) Straws are bulky and contain silica
Q 39. Paper bags should be utilized because?
Answer: d) Degrades very quickly
Q 40. Straw should not be utilized because?
Answer: c) Degrades very quickly
Q 41. Consumption of paper increase per year by ____________
Answer: 10.6
Q 42. What is the requisite for cellulose raw material?
Answer: d) All of above
Q 43. The paper industry in India could be classified into 3 categories.
Answer: a) Wood based, b) Agro based & c) Waste paper based
Q 44. The pulp and paper industry converts cellulose fibre into pulp, paper and paperboards.
Answer: True
Q 45. Raw material for pulp manufacturing
Answer: d) All of above
Q 46. Pulp for papermaking was produced by macerating mulberry bark in Han dynasty.
Answer: True
Q 47. In India, pulp and paper industry is older than 100 years.
Answer: True
Q 48. Raw material for paper manufacturing
Answer: d) All of above
Q 49. Which is the requisite for cellulose raw material?
Answer: d) All of above
Q 50. About 95% of fibre comes from wood, balance from wastepaper and rags.
Answer: True

 Morphology

Q 1. Cellulose is a material which can exist in crystalline and amorphous states
Answer: a) True
Q 2. Which is the part where lignin is highly concentrated?
Answer: b) Middle lamella
Q 3. Cellulose is a linear polymer of anhydro-D-glucose connected by beta-(1-4)-linkage?
Answer: a) True
Q 4. What are the chemical elements present in wood?
Answer: a) C, O, H, N
Q 5. Microfibrils occur in which section of cell wall?
Answer: b) Secondary
Q 6. ___________ decreases the strength of pulp yield, and are not ideal for dissolving pulp process.
Answer: b) Hemicellulose
Q 7. Which of the following is a condensed polymer?
Answer: d) Hemicellulose
Q 8. Which is the compound which is a complex polymer consisting of phenylpropane units and has an amorphous three-dimensional structure?
Answer: b) Lignin
Q 9. Which is the compound by definition are soluble in organic solvents, and water?
Answer: a) Extractives
Q 10. Turpenes are made from _________ units in the living wood cell?
Answer: b) Phosphated isoprene
Q 11. The equilibrium moisture content of wood or wood pulp depends on the temperature and relative humidity of the atmosphere surrounding the specimen.
Answer: a) True
Q 12. What is the full form of FSP?
Answer: d) Fiber saturation point
Q 13. Wood shrinks and swells as a function of ____________
Answer: d) Moisture content
Q 14. At low humidities the equilibrium moisture content will be lower.
Answer: a) True
Q 15. What increases the strength of the paper?
Answer: b) Hemicellulose
Q 16. What decreases the strength of the paper?
Answer: a) Lignin
Q 17. What could increase the fiber surface area?
Answer: b) Increase inter-fiber bonding
Q 18. Wood taken at room temperature and 99% relative humidity will have how much moisture content approaching?
Answer: c) 30%
Q 19. Uneven grain orientation may cause severe warping or __ of lumber and furniture is prone to shrinkage as the wood dries.
Answer: a) Fracture
Q 20. __________ bonding holds ligo cellulose fibers together in paper.
Answer: b) Hydrogen
Q 21. It is fundamental that the properties on paper depend on the fiber properties and the method of fiber preparation.
Answer: a) True
Q 22. It is not crucial to have authentic fiber samples of contributing species on hand for comparison with unknown samples.
Answer: b) False
Q 23. When attempting quantitative analysis of fiber mixtures, the number of a particular type of fiber is multiplied by its ________ since some types of fibers appear to be present in larger amounts than others.
Answer: a) Weight factor
Q 24. ________ is very utilized in the determination of isolated fibers.
Answer: b) Pitting
Q 25. Ray cross—field pitting shows whether ray parenchyma and or tracheids are present; it also indicates the ________
Answer: b) Height of the rays
Q 26. Chemical stains could help with the analysis by concluding the type of pulping method utilized to generate the fiber which is crucial in ________ that might have some recycled newsprint.
Answer: a) White paper
Q 27. ________ is utilized to detect the presence of starch
Answer: d) Iodine
Q 28. Phloroglucinol is specific for ________ causing it to turn red.
Answer: d) Lignin
Q 29. Mechanical softwood and ________ are differentiated with the use of 2% aniline sulfate
Answer: c) Hardwood
Q 30. Mechanical pulp bleached with dithionite no more than a few months old is calculated by detecting traces of __________ as H2S liberated by stannous chloride.
Answer: a) SO2
Q 31. Fibers over ____________ millimetre long are most often softwood fibers.
Answer: b) 2
Q 32. Ray cross—field pitting in softwoods is the principal means of identification.
Answer: a) True
Q 33. Spruce, larch, and hemlock might be able to be distinguished from each other as with true—fir and western redcedar.
Answer: a) True
Q 34. Which of the following is made from Softwood fiber?
Answer: c) Grocery bags
Q 35. Hardwood fibers are accompanied by vessels or vessel fragments depending on the pulping process.
Answer: a) True
Q 36. The source of_________ was arising from the locations outside the mills which helped to expedite the paper making process.
Answer: a) Recycled fiber
Q 37. Recycled fiber is separated from _________ which’s off-specification paper produced at the mill and reused within the mill.
Answer: b) Broke
Q 38. _________ represents the loss of material from the original feed stock to the recovered product.
Answer: c) Shrinkage
Q 39. One of the biggest obstacles for utilizing recycled or secondary fiber is effective _________ removal.
Answer: b) Contaminant
Q 40. Fillers include _________ which could interfere with rosin/alum sizing.
Answer: c) Calcium carbonate
Q 41. Films and laminates include polyethylene, aluminum foil, etc.
Answer: a) True
Q 42. Ink doesn’t consists of pigments to supply colour and opacity.
Answer: b) False
Q 43. CH₃-(CH₂-CH₂)n-CH₃ is called
Answer: b) Polyethylene
Q 44. CH₃(CH₂)nCH₃ (n = 23–38) is called
Answer: a) Paraffin wax
Q 45. What is the name of the compound? (unspecified structure)
Answer: c) Natural rubber
Q 46. About 80% of all waste paper comes from corrugated boxes, newspapers and office papers.
Answer: a) True
Q 47. About 10% of fiber is from non-wood plant fibers.
Answer: a) True
Q 48. Cotton is the pure form of __________
Answer: c) Cellulose
Q 49. Which of the following is a fiber mat made using synthetic fibers?
Answer: d) Nonwovens
Q 50. Sugar cane residue is called
Answer: c) Bagasse
Q 51. Pulp from bamboo is stronger than straw pulp paper.
Answer: b) Stronger
Q 52. ________ are utilized in battery separators, glass fiber filter mats
Answer: a) Glass fibers
Q 53. Straw should not be utilized because?
Answer: c) Straws are bulky and contain silica
Q 54. Paper bags should be utilized because?
Answer: d) Degrades very quickly
Q 55. Straw should not be utilized because?
Answer: c) Degrades very quickly
Q 56. Bagasse is
Answer: a) Sugar cane residue
Q 57. Nylon 6 is also known as
Answer: a) Polycaprolactam
Q 58. Nylon 66 is also known as
Answer: b) polyhexamethylene diamide
Q 59. Polyamide polymers with amide group –CONH is known as
Answer: c) Nylon
Q 60. Melting point of Nylon 6
Answer: b) 223°C
Q 61. Drawback of Nylon
Answer: a) Moisture absorption
Q 62. Maximum operating temperature of Nylon
Answer: b) 250–300°F
Q 63. What is Tynex?
Answer: d) Nylon 610
Q 64. Nylon 6 produced from
Answer: a) Caprolactam
Q 65. Nylon 66 produced from
Answer: c) Hexamethylene diamine and adipic acid
Q 66. Polyester is derived from
Answer: c) Petroleum
Q 67. Fibers classified by length into
Answer: c) Both above
Q 68. Staple fibers are short length fibers
Answer: True
Q 69. Filament fibers are long length fibers
Answer: True
Q 70. Tenacity is directly related to
Answer: d) All above
Q 71. Select correct statement for Morphology
Answer: c) Both above
Q 72. Elastic recovery indicates ability of fibers to return to original length
Answer: True
Q 73. Select correct statement for Resiliency
Answer: c) Both above
Q 74. Most high-performance fibres have low tensile modulus and strength
Answer: False
Q 75. Specialty fibres is
Answer: b) Application oriented
Q 76. Conventional fibres is
Answer: a) Price oriented
Q 77. Select correct statement for Cellulose
Answer: d) All above
Q 78. Fibres are extracted by the process of
Answer: c) Retting
Q 79. Important conditions for good retting are
Answer: d) All above
Q 80. Select correct statement for tenacity
Answer: c) Both above

PULP

Q 1. Pulp consists of 2 things which are, wood and the lignocellulosic materials that are broken down physically and chemically.
Answer: a) True
Q 2. Which are 4 broad categories of pulping processes?
Answer: a) Chemical, semi-chemical, chemi-mechanical, and mechanical
Q 3. Wood-free pulps contain no mechanical pulp or contains pulp subjected to a min. refining.
Answer: a) True
Q 4. ____________ is the process whereby the pulp is separated from large shives, knots, and etc.
Answer: d) Screening
Q 5. ___________ are small finer bundles of fibers that have not been separated into individual fibers during the pulping process.
Answer: a) Shives
Q 6. Which process is used to treat all types of woods for pulping process?
Answer: c) Kraft process
Q 7. How to calculate the total yield?
Answer: a) Screening (%) + Screened yield (%)
Q 8. How to calculate yield %?
Answer: a) (Dry product mass out) / (Dry product mass in) × 100
Q 9. Chemical pulping yields individual fibers that are not cut and give strong papers because of ________ is largely removed.
Answer: d) Lignin
Q 10. Mechanical pulp is pulp produced by using only mechanical attrition to pulp lignocellulosic materials; no chemicals are used.
Answer: a) True
Q 11. The total yield under mechanical pulp is around?
Answer: b) 90–98%
Q 12. The use of mechanical pulps is mainly for non-permanent papers like newsprint.
Answer: a) True
Q 13. What is the full form of PGW?
Answer: d) Pressure Ground Wood
Q 14. What is the full form of RMP?
Answer: a) Refiner Mechanical Pulp
Q 15. Identify the grinder?
Answer: a) Hydraulic magazine grinder
Q 16. Identify the grinder?
Answer: d) Three pocket grinder
Q 17. Which of this is an important pulping variable?
Answer: a) Speed of the refiner plates
Q 18. What is the full form of T.M.P?
Answer: a) Thermomechanical pulp
Q 19. Chemi-mechanical processes were originally named chemi-groundwood processes.
Answer: a) True
Q 20. What is the full form of ESPRA?
Answer: a) Empire State Paper Research Association
Q 21. The most common chemi-mechanical process is?
Answer: d) CTMP
Q 22. In hot sulfite process pressurized hot sulfite liquor is used to treat __ prior to fibration.
Answer: d) Chips
Q 23. The cold soda process was first investigated by U.S. in?
Answer: b) 1950
Q 24. What is the full form of C.T.M.P?
Answer: a) Chemi-thermomechanical pulp
Q 25. Vapor-phase pulping involves chips impregnated with cooking liquor and excess liquor removed.
Answer: a) Vapor-phase pulping
Q 26. Process involving mild chemical treatment followed by mechanical refining is called
Answer: a) Semi-chemical process
Q 27. Range of yield in semi-chemical process
Answer: b) 60–80%
Q 28. High yield chemical pulping is another name of semi-chemical process.
Answer: a) True
Q 29. NSSC full form
Answer: b) Neutral Sulfite Semi-Chemical process
Q 30. NSSC cooking liquor contains
Answer: d) Na₂SO₃ + Na₂CO₃
Q 31. The ______ liquor semi-chemical pulping process uses green liquor
Answer: a) Green
Q 32. Use of waste liquor of semi-chemical mill in kraft recovery plant is called
Answer: b) Cross recovery
Q 33. Low ______ removal makes chemical recovery difficult in semi-chemical process
Answer: a) Lignin
Q 34. Kraft pulping uses NaOH and Na₂S at high pH
Answer: a) True
Q 35. Wood species is important variable during Kraft cooking
Answer: a) True
Q 36. Bleachable kraft pulp lignin content (softwood/hardwood classification given)
Answer: c) Hard
Q 37. Fresh kraft pulping liquor is called
Answer: b) White liquor
Q 38. Waste liquor from kraft pulping is called
Answer: a) Black liquor
Q 39. Partially recovered kraft liquor is called
Answer: d) Green liquor
Q 40. Sulfidity formula
Answer: a) Sulfidity
Q 41. Causticity formula
Answer: b) Causticity
Q 42. Reduction efficiency formula
Answer: a) Reduction efficiency
Q 43. Bleaching decreases brightness
Answer: b) False
Q 44. Bleaching achieved by lignin addition
Answer: b) False
Q 45. ______ pulps are not susceptible to colour reversion
Answer: a) Chemical
Q 46. Lignin removal increases bonding strength
Answer: c) Lignin
Q 47. Bleaching of mechanical pulp is called
Answer: a) Brightening
Q 48. Recovery boiler purpose statement
Answer: a) True
Q 49. Recovery boiler zones (top to bottom)
Answer: a) Oxidation, drying and reducing zone
Q 50. Recovery boiler reaction
Answer: d) Given reactions
Q 51. Cotton/linen pulp is called
Answer: a) RAG pulp
Q 52. Dissolving pulp cellulose content
Answer: a) 90%
Q 53. Brightness refers to
Answer: a) Whiteness distribution
Q 54. Yellowing due to exposure is called
Answer: a) Colour reversion
Q 55. Mechanical pulps are susceptible to colour reversion
Answer: b) Mechanical
Q 56. Bleaching consistency range
Answer: b) 3–20%
Q 57. Mechanical pulp quality better than chemical pulp
Answer: False
Q 58. Yield of chemical pulp is less than mechanical pulp
Answer: True
Q 59. Higher bleaching consistency range
Answer: b) 10–20%
Q 60. Burr pattern order
Answer: a) Thread, diamond, spiral and straight
Q 61. Chip inlet
Answer: a) Chip inlet
Q 62. Liquor inlet
Answer: d) Liquor inlet
Q 63. Liquor level
Answer: c) Liquor level
Q 64. Chip discharge
Answer: b) Chip discharge
Q 65. H-factor definition
Answer: b) Temperature-time pulping variable
Q 66. De-fibrator is also known as
Answer: b) Hot stock refiner

CELLULOSE AND LIGNIN CHEMICALS

Q 1. Cellulose is a material which can exist in crystalline and amorphous states
Answer: a) True
Q 2. Which is the part where lignin is highly concentrated?
Answer: b) Middle lamella
Q 3. Cellulose is a linear polymer of anhydro-D-glucose connected by beta-(1-4)-linkage
Answer: a) True
Q 4. What are the chemical elements present in wood?
Answer: a) C, O, H, N
Q 5. Microfibrils occur in which section of cell wall?
Answer: b) Secondary
Q 6. ___________ decreases the strength of pulp yield, and are not ideal for dissolving pulp process.
Answer: b) Hemicellulose
Q 7. Which of the following is a condensed polymer?
Answer: d) Hemicellulose
Q 8. Which is the compound which is a complex polymer consisting of phenylpropane units and has an amorphous three-dimensional structure?
Answer: b) Lignin
Q 9. The equilibrium moisture content of wood or wood pulp depends on temperature and relative humidity.
Answer: a) True
Q 10. What is the full form of FSP?
Answer: d) Fiber saturation point
Q 11. Wood shrinks and swells as a function of ____________
Answer: d) Moisture content
Q 12. At low humidities the equilibrium moisture content will be lower.
Answer: a) True
Q 13. What increases the strength of the paper?
Answer: b) Hemicellulose
Q 14. What decreases the strength of the paper?
Answer: a) Lignin
Q 15. What could increase the fiber surface area?
Answer: b) Increase inter-fiber bonding
Q 16. Wood taken at room temperature and 99% RH will have moisture content approaching
Answer: c) 30%
Q 17. Uneven grain orientation may cause severe warping or __ of lumber
Answer: a) Fracture
Q 18. Hydrogen bonding holds lignocellulosic fibers together in paper
Answer: b) Hydrogen
Q 19. Lignin is a complex organic polymer in vascular plants
Answer: True
Q 20. Lignins are important in formation of cell walls
Answer: True
Q 21. Lignin is insoluble in water
Answer: True
Q 22. Lignin is soluble in alcohol
Answer: False
Q 23. Lignin is soluble in weak alkaline solutions
Answer: True
Q 24. Lignin constitutes 30% of non-fossil carbon and 20–35% of wood
Answer: True
Q 25. Presence of lignin improves paper strength
Answer: False
Q 26. In sulfite pulping lignin is removed as lignosulfonates
Answer: True
Q 27. Formula of cellulose is
Answer: a) (C6H10O5)n
Q 28. Cellulose is structural component of plant cell wall
Answer: True
Q 29. Cellulose is insoluble in water and most organic solvents
Answer: True
Q 30. Cellulose is a polysaccharide
Answer: True
Q 31. Cellulose is soluble in acid and base
Answer: True
Q 32. Cellulose is used in
Answer: d) All of above
Q 33. Cellulose ethers include
Answer: d) All of above
Q 34. Type of cellulose ether of alkyl include
Answer: d) All of above
Q 35. Cellulose is major constituent of paper
Answer: True
Q 36. Lignin chemical is
Answer: c) Both of above
Q 37. Dimethyl sulphide is soluble in water
Answer: False
Q 38. Dimethyl sulfoxide is soluble in organic solvent
Answer: True
Q 39. Dimethyl sulfoxide is insoluble in water
Answer: False
Q 40. Dimethyl sulphides and dimethyl sulfoxide are manufactured from wood liquor
Answer: True
Q 41. Raw material for DMS and DMSO
Answer: d) All of above
Q 42. Chemical formula of DMSO
Answer: a) C2H6OS
Q 43. Methylcellulose is cold water soluble
Answer: True
Q 44. Ethylcellulose is soluble in water
Answer: False
Q 45. Methyl cellulose is used in
Answer: d) All of above
Q 46. Hydroxyethyl cellulose is used as gelling and thickening agent
Answer: True
Q 47. Lignin fills spaces between cellulose, hemicellulose and pectin
Answer: True
Q 48. Lignin is present in vascular plants but not in bryophytes
Answer: True
Q 49. Dimethyl sulphide is used as food flavoring component
Answer: True

 PAPER

Q 1. __________ are made primarily of bleached chemical softwood pulps and which could have bleached softwood sawdust or hardwood pulps to impart smoothness.
Answer: a) Tissues
Q 2. Newsprint accounts for about 80% of this grade. What is the type we are talking about?
Answer: c) Uncoated groundwood
Q 3. This grade is used for magazines, catalogues, and letterpress.
Answer: a) Coated groundwood
Q 4. __________ is mainly made from kraft or sulfite softwood pulps and may contain limited amounts of mechanical pulp or recycled fiber.
Answer: d) Uncoated wood-free paper
Q 5. The base sheet of coated, wood-free paper is manufactured from kraft or sulfite softwood pulps.
Answer: a) Coated wood-free paper
Q 6. __________ are manufactured from bleached or un-bleached kraft softwood pulp of southern pine.
Answer: c) Wrapping papers
Q 7. Cast-coated paper is a very __________ paper made by drying on chrome plated surface.
Answer: b) High gloss
Q 8. __________ are made for specific uses such as capacitor, cigarette, and greaseproof papers.
Answer: c) Speciality paper
Q 9. __________ is a thick paper of low density used for solid fiber boxes.
Answer: b) Chipboard
Q 10. Pulps sold as wet lap or dry lap without paper machines are called
Answer: c) Market pulp
Q 11. __________ is a vast category of high quality printing or writing papers.
Answer: c) Fine paper
Q 12. __________ are made with a minimum of 25% rag fiber from cotton.
Answer: b) Rag bond
Q 13. __________ are made for writing, typing, and printing purposes.
Answer: d) Bond paper
Q 14. Wrapping tissues are soft and absorbent.
Answer: a) True
Q 15. Sanitary tissues are used for wrapping clothes, flowers, etc.
Answer: b) False
Q 16. __________ is a dense, transparent grade of paper used for tracing.
Answer: c) Glassine tissue
Q 17. __________ are manufactured from highly refined chemical pulps.
Answer: d) Greaseproof paper
Q 18. __________ is an unbleached Kraft softwood sheet used in packaging.
Answer: a) Linerboard
Q 19. __________ is manufactured from unbleached semi-chemical pulp (NSSC).
Answer: b) Corrugated medium
Q 20. Fibers must be properly mixed with additives and slurry treated to remove contaminants.
Answer: a) True
Q 21. Paper consists of a web of fibers held together by hydrogen bonding.
Answer: b) False
Q 22. The device for continuously forming, pressing, and drying paper is
Answer: a) Paper machine
Q 23. Machines using two wires to form sheet are called
Answer: a) Twin wire formers
Q 24. Sheet sealing occurs at around __________% consistency
Answer: d) 0.1–0.20
Q 25. __________ is used for applying pulp slurry to a screen.
Answer: d) Forming
Q 26. __________ is water removal by gravity or pressure difference.
Answer: d) Draining
Q 27. __________ is removal of water by squeezing.
Answer: c) Pressuring
Q 28. __________ is drying over hot surface.
Answer: b) Drying
Q 29. Paper machine removes water from softwood pulp slurry.
Answer: a) Softwood
Q 30. Steam-filled drums used for drying are called
Answer: b) Dryer
Q 31. The system keeping hot air over paper surface is
Answer: d) Ventilation system
Q 32. Keeps paper web against dryer drums
Answer: d) Dryer felts
Q 33. First step in controlling dryer drums is removal of
Answer: d) Steam condensate
Q 34. Enclosure around dryer section is
Answer: a) Dryer hood
Q 35. Impulse drying uses
Answer: d) High pressure press nip
Q 36. Device between dryer sections is
Answer: b) Size press
Q 37. Surface sizing materials are
Answer: a) Polymeric
Q 38. Sizing efficacy is measured by
Answer: b) Gurley porosity
Q 39. Source of recycled fiber
Answer: a) Recycled fiber
Q 40. Recycled fiber separated from
Answer: b) Broke
Q 41. Loss of material from feed stock
Answer: c) Shrinkage
Q 42. Biggest obstacle in recycled fiber is removal of
Answer: b) Contaminant
Q 43. Fillers include
Answer: c) Calcium carbonate
Q 44. Films and laminates include polyethylene, aluminum foil
Answer: a) True
Q 45. Ink does not consist of pigments
Answer: b) False
Q 46. CH₃-(CH₂-CH₂)n-CH₃ is
Answer: b) Polyethylene
Q 47. Recycling fiber is true process
Answer: a) True
Q 48. Recycled fiber recovery does not begin at pulper
Answer: b) False
Q 49. Secondary screen recovers usable
Answer: c) Fiber
Q 50. Removal of ink by washing is called
Answer: c) Ink washing
Q 51. Process using NaOH, silicate, H₂O₂ with surfactant
Answer: c) Deinking chemistry
Q 52. After cleaning pulp is concentrated called
Answer: b) Slurry concentration
Q 53. Mechanical pulps bleaching is done with peroxide
Answer: d) Mechanical pulps
Q 54. Recycling fiber recovery is true process
Answer: a) True
Q 55. Long tube for waste removal is
Answer: b) Junk tower
Q 56. Continuous waste removal device is
Answer: c) Continuous junk removal
Q 57. Secondary screen recovers usable
Answer: c) Fiber
Q 58. Ink removal by washing is
Answer: c) Ink washing
Q 59. Deinking chemistry process
Answer: c) Deinking chemistry
Q 60. After cleaning pulp is concentrated
Answer: b) Slurry concentration
Q 61. Mechanical pulp bleaching
Answer: d) Mechanical pulps

WASTE DISPOSAL TECHNIQUES

Q 1. In Pulp and paper industry, the production process consists two main steps: pulping and bleaching where large quantity of water is used.
Answer: True
Q 2. Water consumption is more in pulping process than in paper making.
Answer: True
Q 3. Water consumption can get as high as 60 m³/ton paper produced.
Answer: True
Q 4. The wastewaters generated include high concentration of chemicals such as
Answer: d. All of above
Q 5. The major problems of the wastewaters are
Answer: d. All of above
Q 6. Type of waste generated from pulp and paper industry
Answer: d. All of above
Q 7. Solid wastes from pulp and paper industry contain
Answer: d. All of above
Q 8. Wastewater treatment sludges contain large amount of solid waste
Answer: True
Q 9. During pulp processing, approximately __________ of lignin cannot be removed
Answer: a. 5–10%
Q 10. _______ is responsible for the dark colour of the end product
Answer: a. Lignin
Q 11. Wastewaters generated from pulping stage include mostly
Answer: d. All of above
Q 12. Bleaching wastewater includes toxic components
Answer: True
Q 13. Pulping wastewater consists of lignin, carbohydrate and extractives
Answer: True
Q 14. Treatment of pulping wastewater biologically is difficult
Answer: True
Q 15. Caustic process generate type of waste
Answer: c. Both of above
Q 16. Power boiler produce type of waste
Answer: b. Ash
Q 17. Paper mill produce type of waste
Answer: a. Sludge
Q 18. Air pollutants generated from pulp and paper industry
Answer: e. All of above
Q 19. Modern waste minimization approach is
Answer: c. Both of above
Q 20. Hazardous waste generation can be reduced by waste management methods
Answer: d. All of above
Q 21. Industries cannot develop and apply new technologies for waste minimization.
Answer: False
Q 22. Organic solvent pulping uses ethanol, methanol
Answer: True
Q 23. Organic solvent pulping is more energy consuming than conventional methods
Answer: True
Q 24. In acid pulping, acetic acid under high pressure is used
Answer: True
Q 25. Bio-pulping is
Answer: c. Biopulping
Q 26. Bio pulping is preferred because
Answer: d. All of above
Q 27. New technologies for pulping
Answer: d. All of above
Q 28. Elemental chlorine can be used for bleaching instead of
Answer: a. Chlorine dioxide and hypochlorite
Q 29. In bio-bleaching fungal cells or enzymes are used
Answer: True
Q 30. White rot fungi reduces chemical dosage in bleaching
Answer: True
Q 31. Lignin can be removed before bleaching by extended delignification
Answer: True
Q 32. Extended delignification may be achieved by cooking, oxygenation, ozonation etc.
Answer: True
Q 33. Extended delignification improves waste effluent quality
Answer: d. All of above
Q 34. Secondary treatment removes suspended solids
Answer: False
Q 35. Biological treatment of wastewater is
Answer: b. Anaerobic treatment
Q 36. Advanced oxidation methods destroy pollutants
Answer: True
Q 37. Photocatalytic reaction is not used to remove COD
Answer: False
Q 38. Membrane filtration removes colour, COD, AOX etc.
Answer: True
Q 39. By membrane filtration COD and BOD can be removed
Answer: a. 80–90%
Q 40. Advanced oxidation methods include
Answer: d. All of above
Q 41. Wet oxidation increases biodegradability from 30% to 70%
Answer: True
Q 42. Solid waste management of pulp and paper mills is done through
Answer: d. All of above
Q 43. Thermal processes include
Answer: d. All of above
Q 44. Paper sludge and organic wastes are disposed by
Answer: a. Incineration
Q 45. Method suitable for fibres and organic wastes
Answer: a. Composting
Q 46. Organic wastes converted to gas and liquid at high temperature without oxygen
Answer: b. Pyrolysis
Q 47. Wet oxidation process converts waste into fuel equivalent to coal
Answer: True
Q 48. Technology not sufficient for pulp and paper mill waste
Answer: c. Steam reforming
Q 49. Landfill method preferred due to CaCO₃ content of sludge
Answer: True
Q 50. Wet oxidation involves oxidation under high temperature and pressure in water
Answer: True

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