PSE 322 Quiz 1-7 Question and
answers 100% correct 2025/2026
What are the three major chemical components of wood (other than water)? - correct answer
✔Cellulose, hemicellulose, lignin
Which of the following is NOT classified as an extractive component of wood? - correct answer
✔Phenolpropane
Of the following items commonly present in papermaking furnish, which has the largest (end-to-end
distance)? - correct answer ✔Fibers
What process, happening during refining, can account for increased conformability of the fibers while
they are still wet? - correct answer ✔Internal delamination
What often becomes ribbon-like in the course of pulping, refining, and formation into paper? - correct
answer ✔Fibers
What is the correct term used to describe the process leading to thin, hair-like strands of cellulose
extending into the water from the outside of a refined kraft pulp fiber? - correct answer ✔Fibrillation
Which of the following typically has the largest cell wall thickness? - correct answer ✔Softwood fibers
(Southern US)
Which two unit operations in the paper machine system typically involve the highest level of
hydrodynamic shear stress? - correct answer ✔Fan pulp and pressure screen
Formation of paper occurs on what part of the paper machine? - correct answer ✔Wire section
,What two items often pass more than one time through the primary circuit of flow in a paper machine
system? - correct answer ✔Water and some of the fines
What type of costs related to the manufacture of paper does not change when the amount of product
being made per unit time in a paper mill changes? - correct answer ✔Fixed Costs
What type of chemical group, and how many, is present on each anhydroglucose repeating unit of
cellulose? - correct answer ✔Hydroxyl (-OH), 3 of them
What polymeric component of wood is comprised of various phenol-propane subunits? - correct
answer ✔lignin
Which of the following is multi-cellular? - correct answer ✔Trachied ***
libriform fiber ***
incorrect
What is typically 3 to 5 mm in size? - correct answer ✔Length of softwood tracheids used in
papermaking
What type of fiber is most conformable? - correct answer ✔Refined kraft fibers
Which of the following kinds of wood does not have vessels? - correct answer ✔Softwoods (conifers)
What is the primary purpose of a pressure screen in the approach flow to a paper machine? - correct
answer ✔Remove larger items
What is a typical width of slots in a slotted pressure screen? - correct answer ✔0.3 mm
, What two streams are combined at the fan pulp of a typical paper machine? - correct answer ✔Thick
stock and white water
The negative charge of typical delignified fibers can be attributed largely to the presence of what? -
correct answer ✔Carboxylic acid
Before bleaching, kraft-pulped fibers have what color? - correct answer ✔Brown
Which of the following fibers is typically the thinnest (smallest diameter)? - correct answer
✔Eucalyptus
Which type of fibers has many broken ends, kinks in the fibers, and miscellaneous debris? - correct
answer ✔Recycled
What are the raised portions called on a typical refiner plate? - correct answer ✔Bars
What helps to prevent formation of a fiber mat within the pressure screen system? - correct answer
✔Action of the rotor
Which of the following is NOT a typical component added to the pulp mixture in a chest located
somewhere before the stuff box of a paper machine? - correct answer ✔thin stock
Excess white water beyond what is needed at the fan pump to dilute the thick stock goes from the paper
machine primary circuit to what unit operation? - correct answer ✔Save-all system
Fibers from juvenile wood (formed when the tree was very young) typically have what attribute? -
correct answer ✔Thinner cell walls than mature wood
answers 100% correct 2025/2026
What are the three major chemical components of wood (other than water)? - correct answer
✔Cellulose, hemicellulose, lignin
Which of the following is NOT classified as an extractive component of wood? - correct answer
✔Phenolpropane
Of the following items commonly present in papermaking furnish, which has the largest (end-to-end
distance)? - correct answer ✔Fibers
What process, happening during refining, can account for increased conformability of the fibers while
they are still wet? - correct answer ✔Internal delamination
What often becomes ribbon-like in the course of pulping, refining, and formation into paper? - correct
answer ✔Fibers
What is the correct term used to describe the process leading to thin, hair-like strands of cellulose
extending into the water from the outside of a refined kraft pulp fiber? - correct answer ✔Fibrillation
Which of the following typically has the largest cell wall thickness? - correct answer ✔Softwood fibers
(Southern US)
Which two unit operations in the paper machine system typically involve the highest level of
hydrodynamic shear stress? - correct answer ✔Fan pulp and pressure screen
Formation of paper occurs on what part of the paper machine? - correct answer ✔Wire section
,What two items often pass more than one time through the primary circuit of flow in a paper machine
system? - correct answer ✔Water and some of the fines
What type of costs related to the manufacture of paper does not change when the amount of product
being made per unit time in a paper mill changes? - correct answer ✔Fixed Costs
What type of chemical group, and how many, is present on each anhydroglucose repeating unit of
cellulose? - correct answer ✔Hydroxyl (-OH), 3 of them
What polymeric component of wood is comprised of various phenol-propane subunits? - correct
answer ✔lignin
Which of the following is multi-cellular? - correct answer ✔Trachied ***
libriform fiber ***
incorrect
What is typically 3 to 5 mm in size? - correct answer ✔Length of softwood tracheids used in
papermaking
What type of fiber is most conformable? - correct answer ✔Refined kraft fibers
Which of the following kinds of wood does not have vessels? - correct answer ✔Softwoods (conifers)
What is the primary purpose of a pressure screen in the approach flow to a paper machine? - correct
answer ✔Remove larger items
What is a typical width of slots in a slotted pressure screen? - correct answer ✔0.3 mm
, What two streams are combined at the fan pulp of a typical paper machine? - correct answer ✔Thick
stock and white water
The negative charge of typical delignified fibers can be attributed largely to the presence of what? -
correct answer ✔Carboxylic acid
Before bleaching, kraft-pulped fibers have what color? - correct answer ✔Brown
Which of the following fibers is typically the thinnest (smallest diameter)? - correct answer
✔Eucalyptus
Which type of fibers has many broken ends, kinks in the fibers, and miscellaneous debris? - correct
answer ✔Recycled
What are the raised portions called on a typical refiner plate? - correct answer ✔Bars
What helps to prevent formation of a fiber mat within the pressure screen system? - correct answer
✔Action of the rotor
Which of the following is NOT a typical component added to the pulp mixture in a chest located
somewhere before the stuff box of a paper machine? - correct answer ✔thin stock
Excess white water beyond what is needed at the fan pump to dilute the thick stock goes from the paper
machine primary circuit to what unit operation? - correct answer ✔Save-all system
Fibers from juvenile wood (formed when the tree was very young) typically have what attribute? -
correct answer ✔Thinner cell walls than mature wood
