PSE 212 Final Exam Questions with all Correct & 100%
Verified Answers |Actual Complete Update |Already
Graded A+
Relative bonded area (RBA) can be described as: ✔Correct Answer-The bonded surface of the
fibers divided by the total fiber surface.
A sheet that is 100 cm^2 has a mass of 1 grams. What is the grammage of the sheet?
✔Correct Answer-100.00
Which theory is used to calculate the breaking length of a paper sheet? ✔Correct Answer-
Page Equation
Increasing the amount of softwood fiber in the sheet is a good way to increase the z-direction
tensile strength (ZDT). ✔Correct Answer-False
The perception of tissue softness is a purely mechanical property? ✔Correct Answer-False
Light scattering is used to measure the overall density the paper sheet and is effective in
predicting the thickness of paper. ✔Correct Answer-False
For the piece of equipment below, what is its name and how much pulp is used per run?
✔Correct Answer-PFI Mill and 240 Grams at 10 % consistency
When a paper sheet is wet pressed more the density increases. This lowers the opacity of the
paper sheet. Why does it lower the opacity? ✔Correct Answer-The opacity decreases because
air voids are removed from the internal structure of the sheet. This reduces the number of
surfaces the light can scatter off of and thus the opacity goes down.
A paperboard is being used to create a box. The wall of the box must 7.0 cm high, and the
paperboard has a thickness of 0.28 mm and elastic modulus of 1.7 GPa. What is the critical load
in pounds that can be applied to the wall of the paper board per inch ✔Correct Answer-0.011
To increase the tear strength, which of the following would be the best option: ✔Correct
Answer-Increase softwood content, lower the amount of refining and increase the basis weight.
Specifications are created without interactions from the outside. ✔Correct Answer-False
Draw in the dryer section of the paper machine greatly influence the directionality of paper,
even more than fiber orientation. ✔Correct Answer-True
, There are two main drainage sections on the Fourdinier. They are _______________ and
____________________ section. ✔Correct Answer-Gravity and Vacuum
The dryline is located where? ✔Correct Answer-Fourdrinier Table
Orthotropic is a term used to describe __________. ✔Correct Answer-the directional
properties of paper
Diffuse illumination is useful because it _____________. ✔Correct Answer-it eliminates the
influence of directionality.
Refining tends to decrease the density of the paper sheet. ✔Correct Answer-False
The variable "R" refers to what properties when speaking about optical properties? ✔Correct
Answer-Reflectance
Which of the following removes contaminants from recycled paper and is located in the pulper?
✔Correct Answer-ragger
Which of the following is the largest source of yield loss when recycling printing and writing
grades? ✔Correct Answer-fillers
Shives in brownstock are mostly removed in the _______ process ✔Correct Answer-screening
What type of additive is used to improve sheet smoothness and opacity? ✔Correct Answer-
fillers
During this test, we are measuring the amount of ___________ required to fracture the sheet
by _____________ a certain distance. ✔Correct Answer-Force, Tearing.
(Swinging tear test machine)
A fire starts in the lab. True or False. You should try to put out the fire. ✔Correct Answer-False
When we add softwood fibers to a paper sheet, we expect the following changes in paper
properties. ✔Correct Answer-Decrease in smoothness, formation (more flocs), opacity.
increase in tensile strength, burst strength, tear strength.
The value of the Student's T-distribution when compared to the normal distribution is:
✔Correct Answer-The Student's T-Distribution allows you to make estimate of confidence when
you do not know the actual standard deviation of the population.
A tissue sheet has a grammage of 20 g/m^2. The sheet is made of fiber with the following
average properties: length = 1.4 mm, width = 35 micrometers, and coarseness = 185 mg/km. On
Verified Answers |Actual Complete Update |Already
Graded A+
Relative bonded area (RBA) can be described as: ✔Correct Answer-The bonded surface of the
fibers divided by the total fiber surface.
A sheet that is 100 cm^2 has a mass of 1 grams. What is the grammage of the sheet?
✔Correct Answer-100.00
Which theory is used to calculate the breaking length of a paper sheet? ✔Correct Answer-
Page Equation
Increasing the amount of softwood fiber in the sheet is a good way to increase the z-direction
tensile strength (ZDT). ✔Correct Answer-False
The perception of tissue softness is a purely mechanical property? ✔Correct Answer-False
Light scattering is used to measure the overall density the paper sheet and is effective in
predicting the thickness of paper. ✔Correct Answer-False
For the piece of equipment below, what is its name and how much pulp is used per run?
✔Correct Answer-PFI Mill and 240 Grams at 10 % consistency
When a paper sheet is wet pressed more the density increases. This lowers the opacity of the
paper sheet. Why does it lower the opacity? ✔Correct Answer-The opacity decreases because
air voids are removed from the internal structure of the sheet. This reduces the number of
surfaces the light can scatter off of and thus the opacity goes down.
A paperboard is being used to create a box. The wall of the box must 7.0 cm high, and the
paperboard has a thickness of 0.28 mm and elastic modulus of 1.7 GPa. What is the critical load
in pounds that can be applied to the wall of the paper board per inch ✔Correct Answer-0.011
To increase the tear strength, which of the following would be the best option: ✔Correct
Answer-Increase softwood content, lower the amount of refining and increase the basis weight.
Specifications are created without interactions from the outside. ✔Correct Answer-False
Draw in the dryer section of the paper machine greatly influence the directionality of paper,
even more than fiber orientation. ✔Correct Answer-True
, There are two main drainage sections on the Fourdinier. They are _______________ and
____________________ section. ✔Correct Answer-Gravity and Vacuum
The dryline is located where? ✔Correct Answer-Fourdrinier Table
Orthotropic is a term used to describe __________. ✔Correct Answer-the directional
properties of paper
Diffuse illumination is useful because it _____________. ✔Correct Answer-it eliminates the
influence of directionality.
Refining tends to decrease the density of the paper sheet. ✔Correct Answer-False
The variable "R" refers to what properties when speaking about optical properties? ✔Correct
Answer-Reflectance
Which of the following removes contaminants from recycled paper and is located in the pulper?
✔Correct Answer-ragger
Which of the following is the largest source of yield loss when recycling printing and writing
grades? ✔Correct Answer-fillers
Shives in brownstock are mostly removed in the _______ process ✔Correct Answer-screening
What type of additive is used to improve sheet smoothness and opacity? ✔Correct Answer-
fillers
During this test, we are measuring the amount of ___________ required to fracture the sheet
by _____________ a certain distance. ✔Correct Answer-Force, Tearing.
(Swinging tear test machine)
A fire starts in the lab. True or False. You should try to put out the fire. ✔Correct Answer-False
When we add softwood fibers to a paper sheet, we expect the following changes in paper
properties. ✔Correct Answer-Decrease in smoothness, formation (more flocs), opacity.
increase in tensile strength, burst strength, tear strength.
The value of the Student's T-distribution when compared to the normal distribution is:
✔Correct Answer-The Student's T-Distribution allows you to make estimate of confidence when
you do not know the actual standard deviation of the population.
A tissue sheet has a grammage of 20 g/m^2. The sheet is made of fiber with the following
average properties: length = 1.4 mm, width = 35 micrometers, and coarseness = 185 mg/km. On
