1|Page
South Carolina Physical_Chemical Wastewater
Operator Class C Exam||VERIFIED EXAM!!!||
COMPLETE QUESTIONS AND DETAILED SOLUTIONS
LATEST UPDATE THIS YEAR-JUST
RELEASED.pdf||NEWEST EXAM!!!
Detritus is noticed in your grit channel. What is the
problem?
A. Velocity too fast with short D/T
B. Velocity too low with long D/T
C. Short circuiting
D. Density currents - Answer-B. Velocity too low with long
D/T
What is considered normal operation of an aerobic
digester?
A. Fill react
B. Skim off foam when needed
C. Settle and Decant as needed
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D. Feed only during low flow or constant when the sun is
out - Answer-C. Settle and Decant as needed
A plant with a flow of 1 MGD should be monitored
A. Continuously
B. Intermittently
C. Daily
D. Every four hours depending on surface load - Answer-
A. Continuously
What do total solids consist of?
A. Dissolved and settleable
B. Floatable and settlable
C. Suspended and dissolved
D. Settlable and nonsettleable - Answer-C. Suspended
and dissolved
What would cause excessive wear on bearing?
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A. Misalignment
B. Reduced Oil due to low viscosity
C. Blow seal
D. Over tubercation - Answer-A. Misalignment
When Chlorine is combined with water what type of pipe
should be used?
A. Ductile iron
B. Asbestos concrete
C. PVC
D. Carbon Steel - Answer-C. PVC
A good settling sludge would consist of what type of
protozoa?
A. Rotifers and nematodes
B. Amoebas and Flagellates
C. Stalked ciliates and mastagoria
D. Free swimmers and stalk ciliates - Answer-D. Free
swimmers and stalk ciliates
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What is Phenolphylein used for in titration
A. Oxidizer
B. Indicator
C. Acid reducer to lower pH
D. Applicator - Answer-B. Indicator
Your plant has an influent of 220 BOD and 163 TSS, and
an effluent of 10 BOD, and 6 TSS. What is the BOD
removal efficiency in your plant?
A. 92%
B. 94%
C. 95%
D. 96% - Answer-C. 95%
You suspect your anaerobic digester is going sour. What is
the best way to verify its condition?
A. pH
B. Foam type
South Carolina Physical_Chemical Wastewater
Operator Class C Exam||VERIFIED EXAM!!!||
COMPLETE QUESTIONS AND DETAILED SOLUTIONS
LATEST UPDATE THIS YEAR-JUST
RELEASED.pdf||NEWEST EXAM!!!
Detritus is noticed in your grit channel. What is the
problem?
A. Velocity too fast with short D/T
B. Velocity too low with long D/T
C. Short circuiting
D. Density currents - Answer-B. Velocity too low with long
D/T
What is considered normal operation of an aerobic
digester?
A. Fill react
B. Skim off foam when needed
C. Settle and Decant as needed
,2|Page
D. Feed only during low flow or constant when the sun is
out - Answer-C. Settle and Decant as needed
A plant with a flow of 1 MGD should be monitored
A. Continuously
B. Intermittently
C. Daily
D. Every four hours depending on surface load - Answer-
A. Continuously
What do total solids consist of?
A. Dissolved and settleable
B. Floatable and settlable
C. Suspended and dissolved
D. Settlable and nonsettleable - Answer-C. Suspended
and dissolved
What would cause excessive wear on bearing?
,3|Page
A. Misalignment
B. Reduced Oil due to low viscosity
C. Blow seal
D. Over tubercation - Answer-A. Misalignment
When Chlorine is combined with water what type of pipe
should be used?
A. Ductile iron
B. Asbestos concrete
C. PVC
D. Carbon Steel - Answer-C. PVC
A good settling sludge would consist of what type of
protozoa?
A. Rotifers and nematodes
B. Amoebas and Flagellates
C. Stalked ciliates and mastagoria
D. Free swimmers and stalk ciliates - Answer-D. Free
swimmers and stalk ciliates
, 4|Page
What is Phenolphylein used for in titration
A. Oxidizer
B. Indicator
C. Acid reducer to lower pH
D. Applicator - Answer-B. Indicator
Your plant has an influent of 220 BOD and 163 TSS, and
an effluent of 10 BOD, and 6 TSS. What is the BOD
removal efficiency in your plant?
A. 92%
B. 94%
C. 95%
D. 96% - Answer-C. 95%
You suspect your anaerobic digester is going sour. What is
the best way to verify its condition?
A. pH
B. Foam type
