CLASS B SURFACE WATER OPERATOR EXAM 2024/2025
Identify the parameters of concern for source water improvements. - Precise Answer 1. solids/ turbidity-measure of matter in water
rature-affect on water density
, taste, and odor-microorganisms produces metabolites like Methylisoborneol (MIB...
Identify the parameters of concern for source water improvements. -
Precise Answer ✔✔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.
Watershed->NOM->TOC that include humic and fulvic acid
4.nitrogen and phosphorus nutrients- cause microorganism to grow and
they come from septic systems, wastewater plants discharge, farm
runoff...
5.organic carbon- 2 groups: NOC and SOC/VOC
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
,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
7.metals-can be toxic and bio-accumulative., regulated by the SWDA
that sets the Max. Contaminant Level (MCL).
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 iron and manganese to be released causing
taste and odor problems
Describe source water improvement methods - Precise Answer
✔✔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 - Precise Answer ✔✔False, dose depends on water
temperature
Solids and turbidity come from urban runoff, streambank erosion,
agricultural runoff, and ______.
a. point sources
b. stack emissions
c. treatment sludge
d. algae - Precise Answer ✔✔Algae
Sources of nitrogen and phosphorus are septic systems, landfill leachate,
urban and agricultural runoff, animal feed lots, and _______.
a. the air
b. wind
c. sunlight
d. all listed - Precise Answer ✔✔The air
Some metals are removed by ______ and ______.
a. screening, filtration
b. coagulation, adsorption
c. coagulation, screening
d. aeration, adsorption - Precise Answer ✔✔Coagulation and absorption
, Reservoirs provide a quiet zone of _______ for sedimentation
a. no movement
b. wave action
c. wind currents
d. slow movement - Precise Answer ✔✔slow movement
Aeration oxidizes iron and manganese forming ______ removed by
sedimentationa. insoluble precipitates
b. soluble precipitates
c. coagulated solids
d. insoluble coagulants - Precise Answer ✔✔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 - Precise Answer ✔✔Biological growth
Cascade aerators are waterfall devices that create turbulence for oxygen
transfer, odor and gas removal, and some disinfection by ________.
a. wind
b. sunlight
c. agitation
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