GRADE 4 WATER TREATMENT PREP
EXAM WITH ALL QUESTIONS |
ALREADY GRADED
Why is carbon dioxide primarily used in the
stabilization process?
a.) Decrease pH
b.) Increase pH
c.) Tie up scale forming ions
d.) Form a protective coating - answer-A
If fluoride is fed ahead of filtration what can
occur?
a.) Some fluoride loss
b.) Problems with disinfection
c.) Increases in fluoride concentration
d.) Formation of precipitate - answer-A
,In a pumping station where two complete
pumping units are provided, how much should a
pump be capable of delivering?
a.) Average Flow
b.) Maximum Flow
c.) 1/2 the average flow
d.) 1/2 maximum flow - answer-A
When there is insufficient alkalinity present in
water to react with the coagulant, alkalinity
should be supplied by
a.) Adding Lime
b.) Adding Turbidity
c.) Reducing plant flow
d.) Removing carbon dioxide - answer-A
Chlorine dioxide is generated on-site by the
reaction of chlorine with what chemical?
,a.) Oxygen
b.) Sodium Chlorite
c.) Salt Brine
d.) Carbon - answer-B
Which of the following emergency leak repair
kits should be on hand for ton cylinders?
a.) Emergency Kit A
b.) Emergency Kit B
c.) Emergency Kit C
d.) Emergency Kit D - answer-B
What will iron that remains in the ferrous state
do?
a.) Be removed by filters
b.) Be removed by the filters
c.) Precipitate in the reaction tank
d.) Settle out - answer-B
, Short circuiting in the flocculation process can
be corrected by
a.) Adjusting the pH
b.) Decreasing the flows
c.) Increasing coagulant dosages
d.) Providing several compartments in series -
answer-D
What removes organic substances from depleted
activated carbon?
a.) Degasification
b.) Recarbonation
c.) Reduction
d.) Reactivation - answer-D
What is the purpose of an anti-siphon valve on a
fluoride metering pump?
EXAM WITH ALL QUESTIONS |
ALREADY GRADED
Why is carbon dioxide primarily used in the
stabilization process?
a.) Decrease pH
b.) Increase pH
c.) Tie up scale forming ions
d.) Form a protective coating - answer-A
If fluoride is fed ahead of filtration what can
occur?
a.) Some fluoride loss
b.) Problems with disinfection
c.) Increases in fluoride concentration
d.) Formation of precipitate - answer-A
,In a pumping station where two complete
pumping units are provided, how much should a
pump be capable of delivering?
a.) Average Flow
b.) Maximum Flow
c.) 1/2 the average flow
d.) 1/2 maximum flow - answer-A
When there is insufficient alkalinity present in
water to react with the coagulant, alkalinity
should be supplied by
a.) Adding Lime
b.) Adding Turbidity
c.) Reducing plant flow
d.) Removing carbon dioxide - answer-A
Chlorine dioxide is generated on-site by the
reaction of chlorine with what chemical?
,a.) Oxygen
b.) Sodium Chlorite
c.) Salt Brine
d.) Carbon - answer-B
Which of the following emergency leak repair
kits should be on hand for ton cylinders?
a.) Emergency Kit A
b.) Emergency Kit B
c.) Emergency Kit C
d.) Emergency Kit D - answer-B
What will iron that remains in the ferrous state
do?
a.) Be removed by filters
b.) Be removed by the filters
c.) Precipitate in the reaction tank
d.) Settle out - answer-B
, Short circuiting in the flocculation process can
be corrected by
a.) Adjusting the pH
b.) Decreasing the flows
c.) Increasing coagulant dosages
d.) Providing several compartments in series -
answer-D
What removes organic substances from depleted
activated carbon?
a.) Degasification
b.) Recarbonation
c.) Reduction
d.) Reactivation - answer-D
What is the purpose of an anti-siphon valve on a
fluoride metering pump?
