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Water Treatment Practice Exam #2 – 85 Q/A
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Water Treatment Practice Exam #2 – 85 Q/A
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Water Treatment Practice Exam #2 – 85Q/A
What is a pathogen? - -Disease-causing microorganisms.
-What is the impact of algae to water quality? - -Taste and odor problems.
-What is the concentration of chlorine gas? - -100%.
-Which of the following is not used to mix coagulants? - -Horizontal paddle
wheel.
-What is considered to be a quick remedy to adress a sudden increase in
filtered water turbidity? - -Feed a filter-aid chemical to the filter influent.
-What is the likely cause of a pinping noise in a pump? - -Cavitation
-Which of the following controls the efficiency of removing suspended solids
in the sedimentation process? - -Flowrate
-What is a sanitary survey? - -An analisis to determine all potencial water
quality impacts to a proposed well.
-Which of the following categories does bacterial belong to? - -Colloidal
-Under the Surface Water Treatment Rule, what must the reduction of
viruses be through filtration and disinfection? - -99.99%
-Which of the following is not considered free residual chlorine? - -
Monochloramine
-Why is coliform used as a indicator organism? - -It reduce the complexity
and cost of analysis.
-What is an example of a non-community, non-transient water - -School.
-What is the purpose of a packing in a pump? - -Control the leakege of
water along the pump shaft and prevent air from entering along the shaft
when the pump is in a suction lift condition.
-What does the addition of carbon dioxide do to the pH of water? - -Lowers
it.
, -What is an unconfined aquifer? - -One in which groundwater posseses a
free surface open to the atmosphere.
-What is static water level in a well? - -Water level when pump is not
running.
-Which of the following Will least likely impact the formation of flocs during
the coagulation and flocculation process? - -Hardness.
-What is formed when free chlorine reacts with ammonia? - -Chloramine.
-Which contaminant causes Blue Baby Syndrome? - -Nitrate.
-What is free chlorine? - -The concentration of residual chlorine in water
which is present as dissolved gas (CL2), hypochlorous acid (HOCI), and/or
hypochlorite ion (OCI).
-What is a thermocline? - -A thin but distinct layer in a reservoir in which
temperature changes more rapidly with depth than it does in the layers
above or below.
-What agency protects the health and safety of industrial employees? - -
OSHA
-What is the first priority in water treatment? - -Production of safe drinking
water.
-What is the health effect of consuming water with high levels of lead? - -
Cardiovascular effects, increased blood pressure and incidence of
hypertension.
-What is an imaginary surface to which ground water rises under hydrostatic
pressure in Wells or springs? - -Piezometric surface
-What is used to evaluate new coagulants or polymers being considered for
use at the plant? - -Jar Test.
-What are the 4 zones in a clarifier? - -Inlet, Outlet, Settling, Sludge.
-Which type of filtration process is approved by the Surface Water
Treatment Rule? - -Conventional water treatment.
-Which of the following impacts the color of source water? - -Organics, such
as soil and leaves.
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