Water Treatment Practice Exam 2
What is a pathogen?(Ans- Disease-causing microorganisms.
What is the impact of algae to water quality?(Ans- Taste and odor problems.
What is the concentration of chlorine gas?(Ans- 100%.
Which of the following is not used to mix coagulants?(Ans- Horizontal paddle wheel.
What is considered to be a quick remedy to address a sudden increase in filtered water turbidity?(Ans- Feed a filter-aid chemical to the filter influent.
What is the likely cause of a pining noise in a pump?(Ans- Cavitation
Which of the following controls the efficiency of removing suspended solids in the sedimentation process?(Ans- Flowrate
What is a sanitary survey?(Ans- An analysis to determine all potential water quality impacts to a proposed well.
Which of the following categories does bacterial belong to?(Ans- Colloidal
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Under the Surface Water Treatment Rule, what must the reduction of viruses be through filtration and disinfection?(Ans- 99.99%
Which of the following is not considered free residual chlorine?(Ans- Monochloramine
Why is coliform used as a indicator organism?(Ans- It reduce the complexity and cost of analysis.
What is an example of a non-community, non-transient water (Ans- School.
What is the purpose of a packing in a pump?(Ans- Control the leakage 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?(Ans- Lowers it.
What is an unconfined aquifer?(Ans- One in which groundwater possesses a free surface open to the atmosphere.
What is static water level in a well?(Ans- 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?(Ans- Hardness.
What is formed when free chlorine reacts with ammonia?(Ans- Chloramine.
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