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WATER OPERATOR CLASS 3-PRACTICE TEST 2026|COMPREHENSIVE Q&A FOR CERTIFICATION SUCCESS

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WATER OPERATOR CLASS 3-PRACTICE TEST 2026|COMPREHENSIVE Q&A FOR CERTIFICATION SUCCESS

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WATER OPERATOR CLASS 3-PRACTICE
TEST 2026|COMPREHENSIVE Q&A FOR
CERTIFICATION SUCCESS



Procedure, Part, Budget, Cost - correct-answer - A preventative maintenance

program includes:




Lower insurance rates - correct-answer - An advantage of a standpipe:




Geographic Informaton System - correct-answer - What is GIS?




Cavitation (boiling) - correct-answer - High flow rates in pumps can cause.

,2|Page


Mechanical rakes, drag chain, traveling bridges - correct-answer - Three ways

sludge is removed from a settling basin are




Inlet, Outlet, Settling, Sludge - correct-answer - The 4 zones of settling basin are:




Before - correct-answer - Polyphosphates are injected before or after

chlorination?




Filter aid - correct-answer - A nonionic polymer is usually used as a:




Giardia, Legionella, Cryptosporidium - correct-answer - Three "bugs" targeted by

the SWTR are:

, 3|Page


Returned to plant head - correct-answer - What should be done with backwash

water?




Taste, odor, chlorine, THM's - correct-answer - Activated carbon is used to

remove:




Adsorption, oxidation, or aeratoin - correct-answer - THM's can be removed by:




Less - correct-answer - Algae produces more or less oxygen at night as compared

to day?




99.99% - correct-answer - A LOG removal of 4 is a removal of what percent?

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