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TCEQ Surface Water Course Exam questions and answers rated A+ 2024/2025
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TCEQ Surface Water Course ExamA restricted zone around a surface water intake of ____________ feet radius shall be
established and all recreational activities prohibited.
a. 500'
b. 200'
c. 1000'
d. 800'
e. None of the above
b. 200'
The primary standard for calibrating a nephelometer is:
a. formic acid
b. fluoride
c. formazin
d. ferric chloride
e. silver sulfate
c. formazin
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The process where smaller particles in the water are combined to form larger heavier ones
that sink in a settling basin is called:
a. coagulation
b. pre-sedimentation
c. disinfection
d. oxidization
e. filtration
,a. coagulation
A _____ inch rise per minute in the filter is required to give a good backwash
a. 35
b. 25
c. 40
d. 20
e. None of the above
b. 25
Under normal conditions a rapid sand filter operates a 2 gpm/ft square. During the back
wash cycle the back wash rate should be _______________ per ft square.
a. 15 gpm
b. 20 gpm
c. 35 gpm
d. 8 gpm
e. 16 gpm
e. 16 gpm
When softening water which process is used?
a. sodium zeolite
b. lime/soda ash
c. phosphate exchange
d. all of the above
e. a and b
e. a and b
You have a rapid sand filter that is 12' wide x 12' long x 6' deep. During a back wash event it
takes 90 seconds to drain 6". What is the filter rate in gallons per minute per square foot?
a. 5
b. 3.74
c. 25
d. 2.5
d. 2.5
A water plants treats 750,000 gallons per day. The normal chlorine dosage is 8 mg/L. If the
disinfectant used is 65% calcium hypochlorite, how many pounds of calcium hypochlorite are
fed each day?
, a. 33
b. 77
c. 50
d. 55
b. 77
Solids and turbidity in raw water come form urban run-off, stream-bank erosion, agricultural
run off, and ________________
a. algae
b. industry discharge
c. treatment sludge
d. domestic sewage
b. algae
Geosmin or ________________ cause taste and odor in water
a. methylisoboreal
b. methylbutanol
c. powdered carbon
d. methane
e. methanol
Methylisoboreal
Aeration oxidizes iron and manganese4 forming ________________ removed by
sedimentation.
a. insoluble coagulates
b. coagulated solids
c. soluble precipitates
d. insoluble precipitates
e. coagulated precipitates
d. insoluble precipitates
The first advantage of destratification is elimination of __________________
______________.
a. algal blooms
b. CO2 gas
c. anaerobic conditions
d. alkalinity
e. dissolved oxygens
c. anaerobic conditions
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