1|Page
WATER TREATMENT GRADE 2 NEWEST 2026-2027
ACTUAL EXAM COMPLETE 230 QUESTIONS AND
CORRECT DETAILED ANSWERS (100%VERIFIED
ANSWERS) |ALREADY GRADED A+|BRAND NEW!!
In lime softening facilities, it is normally good practice
store a minimum of _____ supply of each chemical. -
answer-1 months
What is the term for a conical tank in which the softening
reactions take place quite rapidly as the water swirls
upward trough the unit? - answer-pellet reactor
When magnesium hardness is treated with lime, what is
precipitated? - answer-magnesium hydroxide
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Which regulation is designed to promote routine
surveillance of distribution system water quality to search
for contamination from fecal matter and/or disease-
causing bacteria? - answer-tcr
What is the optmal ph range for the removal of particulate
matter whe using alum as a coagulant? - answer-6.5-7.2
Which forces will pull particles together once they have
been destabilized in the coagulation-flocculation process?
- answer-van der waals forces
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Which of the following is a common mistake that operators
make in regard to flocculation units? - answer-allowing
excessive flocculation time
Ferric sulfate has which advantage over aluminum sulfate
(alum)? - answer-more dense floc
The lower the _________ the more difficult it is to form a
proper floc. - answer-turbidity
Jar test results are expressed in - answer-milligrams per
liter
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List four characteristics of raw water that must be
considered in selecting a treatment chemical? - answer-
any four of the following: type and concentration of
contaminants, temperature, alkalinity, ph, turbidity, color,
total organic carbon
Raw water temperature that approaches the freezing t has
what effect on coagulation and flocculation process? -
answer-as the water temperature decreases the viscosity
of the water increases, which slows the rate of floc settling
How much time is required to develop heavy floc particles
during the flocculation process? - answer-30 minutes
WATER TREATMENT GRADE 2 NEWEST 2026-2027
ACTUAL EXAM COMPLETE 230 QUESTIONS AND
CORRECT DETAILED ANSWERS (100%VERIFIED
ANSWERS) |ALREADY GRADED A+|BRAND NEW!!
In lime softening facilities, it is normally good practice
store a minimum of _____ supply of each chemical. -
answer-1 months
What is the term for a conical tank in which the softening
reactions take place quite rapidly as the water swirls
upward trough the unit? - answer-pellet reactor
When magnesium hardness is treated with lime, what is
precipitated? - answer-magnesium hydroxide
,2|Page
Which regulation is designed to promote routine
surveillance of distribution system water quality to search
for contamination from fecal matter and/or disease-
causing bacteria? - answer-tcr
What is the optmal ph range for the removal of particulate
matter whe using alum as a coagulant? - answer-6.5-7.2
Which forces will pull particles together once they have
been destabilized in the coagulation-flocculation process?
- answer-van der waals forces
,3|Page
Which of the following is a common mistake that operators
make in regard to flocculation units? - answer-allowing
excessive flocculation time
Ferric sulfate has which advantage over aluminum sulfate
(alum)? - answer-more dense floc
The lower the _________ the more difficult it is to form a
proper floc. - answer-turbidity
Jar test results are expressed in - answer-milligrams per
liter
, 4|Page
List four characteristics of raw water that must be
considered in selecting a treatment chemical? - answer-
any four of the following: type and concentration of
contaminants, temperature, alkalinity, ph, turbidity, color,
total organic carbon
Raw water temperature that approaches the freezing t has
what effect on coagulation and flocculation process? -
answer-as the water temperature decreases the viscosity
of the water increases, which slows the rate of floc settling
How much time is required to develop heavy floc particles
during the flocculation process? - answer-30 minutes
