PSE 322 QUIZ 6 QUESTIONS AND ANSWERS
What device, of the following, is based on the venturi principle? - Answers :Eductor
Which of the following terms involves only liquid phases, and no solids? - Answers
:Emulsion
When canister filters are used to filter flakes and debris during metering of a chemical
additives to a papermaking system, what is the main reason why they are typically set
up in pairs of filter units in parallel? - Answers :To allow backflushing to discard
oversized material
What kind of paper test involves comparing the strength of a wetted sheet (standard
time of immersion) to that of a dry sheet of the same paper? - Answers :Wet strength
Which of the following is a valid reason to add a chemical additive at the top of a stock
chest, e.g. a blend chest? - Answers :Avoid adding it to fines-enriched slurry so that
more of it gets onto fiber surfaces.
Which of the following items, used for providing chemical additives for paper machines,
is a textile product? - Answers :Supersack
What device makes sure that chemical additives are injected within the central flow of a
stock line? - Answers :An injection quill
What type of papermaking additive is likely to make an effect that is apparent to the
customer? - Answers :Functional additive
In which of the following ways is a typical routine test of paper at the paper mill different
from the conditions that the paper needs to fact in the real world? - Answers
:INCORRECT It is more complicated and hard to replicate.
It is simpler and more repeatable.
Using standard terminology, what kind of innovation involves existing customers and the
costs and benefits can be estimated? - Answers :Sustaining innovation
What kind of air gets transferred into entrained air when the pressure suddenly
becomes lower at the headbox slice? - Answers :Dissolved
What chemical additive needs to be added earlier than the location (mechanical
deaerator or tray or white water silo) where large bubbles can be separated? - Answers
:Defoamer
, What types of acid can be used to slightly reduce the pH of calcium carbonate with less
dissolution of the mineral filler? - Answers :Phosphoric
What class of papermaking additive is typically added last before the headbox? -
Answers :Retention aid
Which of the following usually involves the lowest cost per unit mass of delivered
material? - Answers :Bulk
Why do papermakers using old paper machine systems often add chemicals before
bends in stock lines? - Answers :Plug flow gets disturbed at the bends, causing mixing.
Which of the following terms means "dilution and mixing" of an additive in a paper
machine system? - Answers :Make-down
When a paper company buys new equipment in order to achieve an innovation, what
component of cost will definitely change? - Answers :Fixed expenses will increase.
What will happen to the price of a paper product if new capacity is added by paper
machine construction or rebuilding or reassignment of an existing paper machine to the
paper grade of interest? - Answers :Price erosion
Using standard terminology, what kind of innovation involves potential to get new
customers, often sub-par product performance, and difficulty in estimating potential
benefits? - Answers :Disruptive innovation
Which of the following has the highest level of hydrodynamic shear on a typical paper
machine? - Answers :Fan pump
What kind of soluble aluminum species is the most effective as a coagulant in
papermaking systems? - Answers :Oligomeric
When a high-charge cationic polymer is added to papermaking furnish, what condition
typically corresponds to the most rapid dewatering? - Answers :Near-zero zeta potential
INCORRECT When the surface is completely covered
What alkaline compound can be used to increase the pH in some cases with less
hazard? - Answers :Sodium carbonate
What kind of a situation can justify purchasing or getting a free sample of a small
quantity of a chemical additive for a papermaking process in a non-returnable
container? - Answers :Lab tests or a short trial
When calibrating the flow rate from an additive supply tank to a paper machine system,
in addition to the installed equipment, what other device is needed? - Answers
:stopwatch
What device, of the following, is based on the venturi principle? - Answers :Eductor
Which of the following terms involves only liquid phases, and no solids? - Answers
:Emulsion
When canister filters are used to filter flakes and debris during metering of a chemical
additives to a papermaking system, what is the main reason why they are typically set
up in pairs of filter units in parallel? - Answers :To allow backflushing to discard
oversized material
What kind of paper test involves comparing the strength of a wetted sheet (standard
time of immersion) to that of a dry sheet of the same paper? - Answers :Wet strength
Which of the following is a valid reason to add a chemical additive at the top of a stock
chest, e.g. a blend chest? - Answers :Avoid adding it to fines-enriched slurry so that
more of it gets onto fiber surfaces.
Which of the following items, used for providing chemical additives for paper machines,
is a textile product? - Answers :Supersack
What device makes sure that chemical additives are injected within the central flow of a
stock line? - Answers :An injection quill
What type of papermaking additive is likely to make an effect that is apparent to the
customer? - Answers :Functional additive
In which of the following ways is a typical routine test of paper at the paper mill different
from the conditions that the paper needs to fact in the real world? - Answers
:INCORRECT It is more complicated and hard to replicate.
It is simpler and more repeatable.
Using standard terminology, what kind of innovation involves existing customers and the
costs and benefits can be estimated? - Answers :Sustaining innovation
What kind of air gets transferred into entrained air when the pressure suddenly
becomes lower at the headbox slice? - Answers :Dissolved
What chemical additive needs to be added earlier than the location (mechanical
deaerator or tray or white water silo) where large bubbles can be separated? - Answers
:Defoamer
, What types of acid can be used to slightly reduce the pH of calcium carbonate with less
dissolution of the mineral filler? - Answers :Phosphoric
What class of papermaking additive is typically added last before the headbox? -
Answers :Retention aid
Which of the following usually involves the lowest cost per unit mass of delivered
material? - Answers :Bulk
Why do papermakers using old paper machine systems often add chemicals before
bends in stock lines? - Answers :Plug flow gets disturbed at the bends, causing mixing.
Which of the following terms means "dilution and mixing" of an additive in a paper
machine system? - Answers :Make-down
When a paper company buys new equipment in order to achieve an innovation, what
component of cost will definitely change? - Answers :Fixed expenses will increase.
What will happen to the price of a paper product if new capacity is added by paper
machine construction or rebuilding or reassignment of an existing paper machine to the
paper grade of interest? - Answers :Price erosion
Using standard terminology, what kind of innovation involves potential to get new
customers, often sub-par product performance, and difficulty in estimating potential
benefits? - Answers :Disruptive innovation
Which of the following has the highest level of hydrodynamic shear on a typical paper
machine? - Answers :Fan pump
What kind of soluble aluminum species is the most effective as a coagulant in
papermaking systems? - Answers :Oligomeric
When a high-charge cationic polymer is added to papermaking furnish, what condition
typically corresponds to the most rapid dewatering? - Answers :Near-zero zeta potential
INCORRECT When the surface is completely covered
What alkaline compound can be used to increase the pH in some cases with less
hazard? - Answers :Sodium carbonate
What kind of a situation can justify purchasing or getting a free sample of a small
quantity of a chemical additive for a papermaking process in a non-returnable
container? - Answers :Lab tests or a short trial
When calibrating the flow rate from an additive supply tank to a paper machine system,
in addition to the installed equipment, what other device is needed? - Answers
:stopwatch
