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New Mexico Water Operator Certification Actual Exam, Study Guide And Practice Exam Newest 2025/2026 Complete Questions And Correct Detailed Answers (Verified Answers) |Already Graded A+||Brand New Version!!
The best addition for water that is highly colored due to organic matter would be
- The addition of lime
- Lime addition with increase in the coagulant
- A small increase in a nonionic polymer
- The addition of an acid to lower pH before coagulation -
ANSWER-D. The addition of an acid to lower pH before coagulation
If the activation process of silica is not carefully controlled what could happen in the coagulation flocculation process? - ANSWER-Floc formation could be inhibited
What device collects the settled water as it leaves the sedimentation basin? - ANSWER-Effluent launder
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In solids contact basins with fairly constant water quality parameters, how often should the solids concentration be determined? - ANSWER-At least twice per day
The definition of decant is? - ANSWER-To draw off the liquid from a vessel of any size without stirring up bottom sediment
How often should sedimentation basins with mechanical sludge removal equipment be drained and inspected? - ANSWER-Once a year
What is the most important reason to reduce turbidity? - ANSWER-To remove pathogens
If enteric disease-causing protozoans have been found in the effluent of a water plant which is the most probable solution? - ANSWER-Use a multibarrier approach; coagulation, flocculation, sedimentation, and filtration
What is the major cause of short circuiting in a sedimentation basin? - ANSWER-Poor inlet baffling
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Conventional sedimentation has what type of removal of Cryptosporidium oocysts? - ANSWER-less than 0.5 log
In solids contact basins, weir loading normally should not exceed? - ANSWER-10 gpm/ft of weir length
Dissolved air flotation is particularly good for removing? - ANSWER-Algae
What determines whether or not colloidal sized particles in suspension repel each other, stay in suspension, or agglomerate and eventually settle? - ANSWER-Magnitude of the charges
If the sludge in a sedimentation basin becomes too thick, what could happen? - ANSWER-Solids can become resuspended or taste and odors can develop
In basins using tube and plate settlers, what parameter must be much better than conventional treatment basins? - ANSWER- Floc must have good settling characteristics
What type of sedimentation basins have the flow of water admitted at an angle? - ANSWER-Spiral flow basins 3 / 4
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At what minimum angle must self cleaning tube settlers be placed? - ANSWER-50°
If nematodes are interfering with the disinfectant, what is the most probable solution? - ANSWER-Optimize the settling process
At what angle should the parallel inclined plates be installed when using the shallow depth sedimentation method? -
ANSWER-45°
Why do solids contact basins have much shorter detention times than conventional treatment basins? - ANSWER-Because of the recycled materials from the sludge blanket, the chemical reactions occur more quickly and completely in the mixing area
The pulsating energy in a pulsator clarifier helps to? - ANSWER-Maintain a uniform sludge blanket layer
Pulsator clarifiers are used to treat water that is? - ANSWER- High in color and low in turbidity
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