Water Treatment Operator Certification Study Guide (AWWA) Latest 2023 Rated A+

Water Treatment Operator Certification Study Guide (AWWA) Latest 2023 Rated A+ A continuously flowing watercourse ✔✔Perennial Stream Algae causes PH to ....... at night ✔✔Decrease What contributes to creation of alg ...

Water Treatment Operator Certification Study Guide (AWWA) Latest 2023 Rated A+ A continuously flowing watercourse ✔✔Perennial Stream Algae causes PH to ....... at night ✔✔Decrease What contributes to creation of algae blooms ✔✔Increased nutrients Iron is found mostly in what sources of water ✔✔Groundwater Also called the rule of reasonable sharing ✔✔Riparian Doctrine Water high in salinity and warm is ✔✔Low in dissolved oxygen Reservoir turnover ✔✔Denser water at surface sinking toward the bottom Water that flows into rivers after rainfall ✔✔Surface runoff Recreation can ....... of land adjacent to a reservoir ✔✔increase the threat of erosion Water bearing geological zone composed of material deposited by flowing rivers ✔✔Alluvial aquifer What effect will algae have on dissolved oxygen ✔✔Increase DO during the day and lower DO during the night How does alkalinity effect the use of copper sulfate ✔✔Copper sulfate is more effective as alkalinity decreases The amount of water in a formation depends on..... ✔✔The porosity of the water-bearing formation What enables blue green algae to grow ✔✔Nutrients Recommended loading rate of copper sulfate for algae control ✔✔5.4 lbs per acre of surface area Primary origin of coliform bacteria ✔✔Animal or human feces Amount of water a well produces for each foot of drawdown ✔✔Specific capacity Most common well used in public water supply ✔✔Drilled well What is disinfection ✔✔inactivation or killing of pathogenic organisms free chlorine residual valus are based on a contact time of.... ✔✔10 minutes Strength of Calcium Hypochlorite ✔✔65-70% What chemicals raise PH in water ✔✔Soda Ash, Caustic Soda, As water temp increases, disinfection action....... ✔✔Increases Maximum chlorine usage per day from a 150lb cylinder ✔✔42 lbs What chemical is used to soften water through chemical precipitation ✔✔Calcium hydroxide (lime) Mudballs are clumps of........ ✔✔Filter media and other material Coagulation occurs during the first ..... ✔✔1 to 5 seconds When should a filter be backwashed ✔✔High head, turbidity breakthrough, or designated hours What does CaCO3 (Calcium Carbonate) do? ✔✔Decreases corrosion Most important test to indicate proper sedimentation ✔✔turbidity What is considered and excellent zeta potential ✔✔-1 to -4 What is used to test for residual chlorine ✔✔DPD What is a major part of a turbidimeter ✔✔Light source What parameter is used o indicate clarity of water ✔✔turbidity PH is the measure of......... ✔✔hydrogen ion concentration Free chlorine residual includes ✔✔OCI- and HOCI How many log removal for viruses ✔✔4 log 99.99% Highest concentration of hypochlorous acidoccurs at what PH? ✔✔5 What flask is most accurate ✔✔volumetric flask What flouride comes in solution form ✔✔flourosilicic acid Chemical formula for bicarbonate ✔✔HCO-3 Capability of water to resist change in PH is called ✔✔Buffering capacity In a coliform presence-absence test a sample should be ✔✔incubated for 24 and 48 hours at 35* C Optimal flouride concentration in drinking water is set in relation to the........ ✔✔Annual average maximum daily air temp What test is used to determine optimal coagulant dosage ✔✔Jar Test Sequence of growth in a multiple-tube fermentation method ✔✔LTB, BGB, and EMB. Lauryl Tryptose Broth, Eosin Methylene Blue, Brilliant Green lactose Bile Broth Giardia cysts range in size from ✔✔8 to 20 microns Quantity of oxygen that can be dissolved in water is directly related to........ ✔✔Temperature What is apparent color ✔✔color in sample before it is filtered Grease lubricated bearings should be regreased at what frequency? ✔✔3 - 6 Months Check valves prevent ........... ✔✔Water from flowing in two directions Packing joints should be....... ✔✔Staggered Primary function of couplings ✔✔Compensate for alignment changes How do you determine watts ✔✔(amps)x(volts) What are the different types of pumps ✔✔Centrifugal, positive displacement, and turbine What does a hypochlorinator do? ✔✔Feed a liquid chlorine solution into a water supply What causes water hammer ✔✔opening or closing a valve too fast When should a positive displacement pump be operated? ✔✔When suction and discharge valves are open How much does a 1-ton cylinder weigh? ✔✔3,700 lbs Pumps seals are classified how? ✔✔Packing ring or mechanical What causes pumps to make a pinging sound ✔✔cavitation What is the main purpose of priming ✔✔Replace air with water inside the pump What is the purpose of a vacuum regulator ✔✔Stop flow of chlorine gas if a leak develops Mechanical seals are appropriate for pumps operating under....... ✔✔High suction head What valve is most suitable for a throttling application ✔✔Pressure reducing valve Valve installed at the end of the suction pipe on a centrifugal pump is called...... ✔✔a foot valve (Pump efficiency) x (Motor efficiency) ✔✔Wire to water efficiency Opening the discharge valve one full turn on a chlorine cylinder will........ ✔✔Permit maximum discharge What is the "C Value" ✔✔Number that describes smoothness of the interior of a pipe Tubercles form on what kind of pipe ✔✔Ductile iron What indicates bearing failure ✔✔noise from pump