PSE 322 QUIZ 9 QUESTIONS AND ANSWERS
What type of wet-strength agent is capable of reacting with carboxylic acid groups? -
Answers :Polyamidoamine epichlorohydrin
Why is carboxymethyl cellulose often helpful for the performance of polyamidoamine
epichorohydrin wet-strength resin? - Answers :It helps to balance the charge and it can
react with it.
If the wet Mullen burst strength is 12 psi and the dry Mullen burst strength is 60 psi, then
what is the relative wet strength? - Answers :20%
What color coordinate goes from blue to yellow? - Answers :b*
What wavelength is reflected the most if one adds approximately equal values of blue
and yellow dye when the paper is being made? - Answers :Green
Which of the following is the most difficult to retain on papermaking fibers due to its
small molecular size and negative ionic charge? - Answers :Acid dye
Which of the following groups is most important for helping a great many papermaking
dyes to dissolve in water? - Answers :Sulfonate
What wavelength or wavelengths is/are reflected the least if one adds approximately
equal values of blue and yellow dye when the paper is being made? - Answers :Blue
and red wavelengths
What color coordinate goes from green to red? - Answers :a*
Which of the following is most likely to yield deposits in the paper mill, which will be
"running 24 - 7"? - Answers :Continuous mixing of cationic and anionic dyes before their
addition to the papermaking system
Which of the following filler types typically has the strongest negative surface charge
due to dispersants used during grinding? - Answers :GCC
Which of the following has the highest refractive index? - Answers :TiO2
Which type of filler can be expected to retain more efficiently in paper on account of its
positive charge (when made on-site)? - Answers :Precipitated calcium carbonate
Which of the following wet-strength systems is favored by alkaline pH of the fiber slurry?
- Answers :Polyamidoamine epichlorohydrin
What is a hemi-acetal covalent bond good for? - Answers :Temporary wet strength
What type of wet-strength agent is capable of reacting with carboxylic acid groups? -
Answers :Polyamidoamine epichlorohydrin
Why is carboxymethyl cellulose often helpful for the performance of polyamidoamine
epichorohydrin wet-strength resin? - Answers :It helps to balance the charge and it can
react with it.
If the wet Mullen burst strength is 12 psi and the dry Mullen burst strength is 60 psi, then
what is the relative wet strength? - Answers :20%
What color coordinate goes from blue to yellow? - Answers :b*
What wavelength is reflected the most if one adds approximately equal values of blue
and yellow dye when the paper is being made? - Answers :Green
Which of the following is the most difficult to retain on papermaking fibers due to its
small molecular size and negative ionic charge? - Answers :Acid dye
Which of the following groups is most important for helping a great many papermaking
dyes to dissolve in water? - Answers :Sulfonate
What wavelength or wavelengths is/are reflected the least if one adds approximately
equal values of blue and yellow dye when the paper is being made? - Answers :Blue
and red wavelengths
What color coordinate goes from green to red? - Answers :a*
Which of the following is most likely to yield deposits in the paper mill, which will be
"running 24 - 7"? - Answers :Continuous mixing of cationic and anionic dyes before their
addition to the papermaking system
Which of the following filler types typically has the strongest negative surface charge
due to dispersants used during grinding? - Answers :GCC
Which of the following has the highest refractive index? - Answers :TiO2
Which type of filler can be expected to retain more efficiently in paper on account of its
positive charge (when made on-site)? - Answers :Precipitated calcium carbonate
Which of the following wet-strength systems is favored by alkaline pH of the fiber slurry?
- Answers :Polyamidoamine epichlorohydrin
What is a hemi-acetal covalent bond good for? - Answers :Temporary wet strength
