TCEQ CLASS B SURFACE WATER OPERATOR EXAM QUESTIONS WITH CORRECT SOLUTIONS ALL VERIFIED BY AN EXPERT A+ GRADED (LATEST)

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TCEQ CLASS B SURFACE




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WATER OPERATOR EXAM

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QUESTIONS WITH CORRECT
SOLUTIONS ALL VERIFIED BY
YC
AN EXPERT A+ GRADED
(LATEST)
D
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ST

,Identify the parameters of concern for source water improvements.
1. solids/ turbidity-measure of matter in water

2.temperature-affect on water density

3.color, taste, and odor-microorganisms produces metabolites like Methylisoborneol (MIB) and
Geosmin.




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Watershed->NOM->TOC that include humic and fulvic acid

4.nitrogen and phosphorus nutrients- cause microorganism to grow and they come from septic




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systems, wastewater plants discharge, farm runoff...

5.organic carbon- 2 groups: NOC and SOC/VOC




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natural organic carbon (NOM): include fulvic and humic acid that come from rock formation.

synthetic organic carbon and volatile organic carbon (SOC/VOC): come from industrial and
chemical waste
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6.microbial pathogens- contaminates such as GIARDIA and CRYPTOSPORIDIUM. present in
rivers and streams are caused by septic systems, wastewater plants discharge, farm runoff...

a + fecal coliform test mens the contaminates are present
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7.metals-can be toxic and bio-accumulative., regulated by the SWDA that sets the Max.
Contaminant Level (MCL).
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8.oil and grease-prevent oxygen from dissolving in water

9.dissolved oxygen- lack of oxygen in water, hydrogen sulfide and sulfur are present & causes
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iron and manganese to be released causing taste and odor problems




Describe source water improvement methods
reservoirs- have slow movement which allows solids to settle

aeration- saturate water with oxygen.
oxidizes iron and manganese, remove dissolved gases, cools hot water...

reservoir destratification- remove temperature layers.

,TRUE OR FALSE: copper sulfate effectively controls all types of algae at low doses
False, dose depends on water temperature


Solids and turbidity come from urban runoff, streambank erosion, agricultural runoff, and
______.
a. point sources
b. stack emissions




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c. treatment sludge
d. algae
Algae




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Sources of nitrogen and phosphorus are septic systems, landfill leachate, urban and agricultural




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runoff, animal feed lots, and _______.
a. the air
b. wind
c. sunlight
d. all listed
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The air


Some metals are removed by ______ and ______.
a. screening, filtration
b. coagulation, adsorption
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c. coagulation, screening
d. aeration, adsorption
Coagulation and absorption
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Reservoirs provide a quiet zone of _______ for sedimentation
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a. no movement
b. wave action
c. wind currents
d. slow movement
slow movement


Aeration oxidizes iron and manganese forming ______ removed by sedimentationa. insoluble
precipitates
b. soluble precipitates
c. coagulated solids

, d. insoluble coagulants
insoluble precipitates


Disadvantages of spray aerators are moisture from drift, water loss to evaporation, down time in
freezing weather, and ______.
a. wood rot
b. loud noise
c. biological growth
d. strong odor




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Biological growth




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Cascade aerators are waterfall devices that create turbulence for oxygen transfer, odor and gas
removal, and some disinfection by ________.
a. wind




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b. sunlight
c. agitation
d. aeration
Sunlight
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A pH change in aerated source water occurs if ______ was present.
a. calcium carbonate
b. ferric sulfate
c. sodium bicarbonate
d. carbon dioxide
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Carbon dioxide
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_________ is an odorless gas that flashes off upon aeration.
a. Methane
b. Hydrogen sulfide
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c. Ammonia
d. Oxygen
Methane


Free-flowing streams usually have small traces of ______ and ______, due to runoff, then
concentrates them in reservoirs.
a. Fe, Mn
b. CO2, H2S
c. NH3, O2
d. H2, O2