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Water Plant Operator Certification Exam Prep - AWWA Questions And answers 2024/25
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Water Plant Operator Certification ExamPrep - AWWA Questions And answers
2024/25
Spontaneous combustion can occur if activated carbon is mixed with... - Potassium II II II II II II II II II II II II II
permanganate
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If chemical solutions gets on a person's skin, the area should be flushed
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_______________, and if the chemical dust are inhaled ______________________. -
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with large quantities of water, consult a physician immediately
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II Who esablishes MCLs? - State and federal regulations
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If a filter's turbidity exceeds _____ NTU in the first 4 hours of a given filter run for two
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consecutive _________samples, the results must be reported within ________days
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following the month of occurrence. - 0.5, 15 minute, 10
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Compliance for chlorite is based on the _________________of __________ monitoring
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locations each _______________. - average, 3, month
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What regulation specifies the percentage removal of TOC? - Stage 1 Disinfectants and
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By Products Rule
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What are the log requirements under Interim Enhanced Surface Water Treatment Rule
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for Giardia and Cryptosporidium? - 3 log and 2 log respectively
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Combined FE turbidity must be equal to .03 NTU for ______% of samples collected each
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month, and none of samples can be _______. - 95, >1
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II If Soda Ash gets into the eyes - Flush 15 minutes with warm water
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If variables and waivers are not granted, the Public Water System should sample every
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___________ years in regard to Phase I, II, V contaminants. - 3
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In order to comply with enhanced coagulation requirements, a softening plant would need
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to remove _________of _________________ hardness. - 10 mg/L ; magnesium
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Treatment plants must remove specific percentages of TOC based on their
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_____________________, ___________________ and _____________________
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levels under the enhanced coagulation requirements. - sourcewater, TOC, alkalinity
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The locational running annual average applies to what USEPA regulation? - Stage 2
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Disinfectants and Disinfection By Products Rule
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, Records need to be reported for any testing required for filter exemptions under... - The
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Interim Enhanced Surface Water Treatment Rule
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II Unit of Gamma Radiation - REM II II II II II II II
II The pump shaft's main function - to transmit torque from the motor to the impeller
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Packing replacement is done - when no further tightening can be done on the packing
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gland
II
II Packing rings should be staggered at - 90 degrees II II II II II II II II II II
II Packing is designed to - wear with normal use and deteriorate with normal use
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II When is chlorine dioxide stable? - in the absence of light and elevated temperatures
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Ultraviolet Treatment - requires a monitoring procedure other than monitoring to
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determine its efficiency
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II A disinfectant oxidant not affected by pH - chlorine dioxide
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Graded gravel below the sand in a media filter does what? - - supports the underdrain
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system
II
- supports the sand bed
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- prevents sand from entering the underdrain
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II Surface wash systems for filters agitate the top _____ inches of the media. - 2
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After the air alone portion of the wash cycle is complete, water is introduced at a rate of
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______ to _____ gpm/ft, which is called concurrent air/water wash - 5 to 7
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A diffuser feeding a pipeline with chlorine gas solution should have complete mixing
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downstream at a distance of _______ pipe diameters. - 10
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Flow proportional control - chlorine gas controller if chlorine demand rarely changes and
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it is necessary to compensate only for changes in the pumping rate.
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Compound Loop Control - Chlorine gas controller that automatically maintains a
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constant chlorine residual regardless of chlorine demand or flow rate changes.
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In fluoride saturator tanks, the chemical solution should be at least _____ inches deep,
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and if the saturator treats more than 100 gpm, it should have a chemical depth of at least
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_______ inches. - 6; 10
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II Down flow fluoride saturator tanks should be cleaned how often? - 1 to 3 times per year
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