PSE 212 Final Review Question and
answers verified to pass 2025/2026
T/F: When water vapor passes through a sheet of paper, it only travels in the pore spaces. - correct
answer ✔false
T/F: The standard deviation can be calculated by taking the square root of the variance - correct answer
✔true
The term "hysteresis" when used in the context of water and paper can best be described as - correct
answer ✔The characteristic of a paper sheet where the moisture content at a given humidity will be
different depending on the prior moisture history of the sample
T/F: Two signals can be fully resolved from each other when their averages are separated by 1.5
standard deviations - correct answer ✔false
T/F: The main way to improve the z-direction tensile strength is to add softwood fiber - correct answer
✔false
T/F: Brightness is measured at 457 nm wavelength of light - correct answer ✔true
T/F: On the Hunter Lab scale, the "a" axis describes the blue/yellow value of a shade - correct answer
✔false
You are getting ready to make a presentation to a group of co-workers. It is important to report your
findings in an accurate manner. You measured the water absorption of 10 different samples and got a
result of 12.3 g/g for water uptake. The Sample standard deviation is 4.2 g/g. Determine the value for
the blank below at a 90 % Confidence interval. - correct answer ✔12.3 +/- 2.44
,T/F: A highly refined softwood had a fold endurance of 25 double folds - correct answer ✔false
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
Orthotropic is a term used to describe __________ - correct answer ✔the directional properties of
paper
The load applied to a material divided by the cross sectional area is known as the __________ - correct
answer ✔stress
This theory is not related to the tensile properties of paper - correct answer ✔Kubelka-Munk Theory
T/F: Hercules size test is used the characterize the amount of water taken up by a paper sheet in a
defined amount of time - correct answer ✔false
The breaking length of paper describes _______________ - correct answer ✔the length of paper
required to break the sheet if the paper is held at one end
What molecular is cellulose made of? - correct answer ✔glucose
As beating continues, the freeness ________ - correct answer ✔goes down
A paper sheet has increase tensile strength and decreased basis weight. What should you do to get the
properties back in specification? - correct answer ✔Decrease refining and increase basis weight
What is largest types of paper produced, by weight? - correct answer ✔packaging grades
, Which of the following is an example of a TCF bleaching sequence? - correct answer ✔O-Z-E-P
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
Cellulose is a polymer made up of what sugar? - correct answer ✔glucose
What are the two broad categories of paper machines? - correct answer ✔fourdrinier and twin-wire
A paper sheet has a density of 620 kg/m^3 and a basis weight of 85 g/m^2. What is the thickness of the
sheet? - correct answer ✔0.137 mm
T/F: Tear strength measures the amount of energy to tear through a paper sheet even though the units
on test are "force" units - correct answer ✔true
Tensile Energy Absorption (TEA) can be described as - correct answer ✔There area under the
force/displacement of a tensile test for paper
Which of the following test are test methods used to measure the Z-Direction properties of paper? -
correct answer ✔Scott Bond, Wax Pick, ZDT
The local basis, in the context of statistical geometry, may be defined as - correct answer ✔The basis
weight within an area of inspection for a sample of paper used to characterize the formation
T/F: TAPPI Opacity and ISO Opacity are the same measurements and are interchangeable - correct
answer ✔false
answers verified to pass 2025/2026
T/F: When water vapor passes through a sheet of paper, it only travels in the pore spaces. - correct
answer ✔false
T/F: The standard deviation can be calculated by taking the square root of the variance - correct answer
✔true
The term "hysteresis" when used in the context of water and paper can best be described as - correct
answer ✔The characteristic of a paper sheet where the moisture content at a given humidity will be
different depending on the prior moisture history of the sample
T/F: Two signals can be fully resolved from each other when their averages are separated by 1.5
standard deviations - correct answer ✔false
T/F: The main way to improve the z-direction tensile strength is to add softwood fiber - correct answer
✔false
T/F: Brightness is measured at 457 nm wavelength of light - correct answer ✔true
T/F: On the Hunter Lab scale, the "a" axis describes the blue/yellow value of a shade - correct answer
✔false
You are getting ready to make a presentation to a group of co-workers. It is important to report your
findings in an accurate manner. You measured the water absorption of 10 different samples and got a
result of 12.3 g/g for water uptake. The Sample standard deviation is 4.2 g/g. Determine the value for
the blank below at a 90 % Confidence interval. - correct answer ✔12.3 +/- 2.44
,T/F: A highly refined softwood had a fold endurance of 25 double folds - correct answer ✔false
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
Orthotropic is a term used to describe __________ - correct answer ✔the directional properties of
paper
The load applied to a material divided by the cross sectional area is known as the __________ - correct
answer ✔stress
This theory is not related to the tensile properties of paper - correct answer ✔Kubelka-Munk Theory
T/F: Hercules size test is used the characterize the amount of water taken up by a paper sheet in a
defined amount of time - correct answer ✔false
The breaking length of paper describes _______________ - correct answer ✔the length of paper
required to break the sheet if the paper is held at one end
What molecular is cellulose made of? - correct answer ✔glucose
As beating continues, the freeness ________ - correct answer ✔goes down
A paper sheet has increase tensile strength and decreased basis weight. What should you do to get the
properties back in specification? - correct answer ✔Decrease refining and increase basis weight
What is largest types of paper produced, by weight? - correct answer ✔packaging grades
, Which of the following is an example of a TCF bleaching sequence? - correct answer ✔O-Z-E-P
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
Cellulose is a polymer made up of what sugar? - correct answer ✔glucose
What are the two broad categories of paper machines? - correct answer ✔fourdrinier and twin-wire
A paper sheet has a density of 620 kg/m^3 and a basis weight of 85 g/m^2. What is the thickness of the
sheet? - correct answer ✔0.137 mm
T/F: Tear strength measures the amount of energy to tear through a paper sheet even though the units
on test are "force" units - correct answer ✔true
Tensile Energy Absorption (TEA) can be described as - correct answer ✔There area under the
force/displacement of a tensile test for paper
Which of the following test are test methods used to measure the Z-Direction properties of paper? -
correct answer ✔Scott Bond, Wax Pick, ZDT
The local basis, in the context of statistical geometry, may be defined as - correct answer ✔The basis
weight within an area of inspection for a sample of paper used to characterize the formation
T/F: TAPPI Opacity and ISO Opacity are the same measurements and are interchangeable - correct
answer ✔false
