Class C Water Operator License Exam Solved 100%

Ammonia mixed with chlorine gas creates a - Answer white smoke The most difficult part of a water distribution operator's job. - Answer furnish a continuous supply Physical connection between a safe and potentially unsafe water source. - Answer cross connection A distribution system is a - Answer looped system Dead end mains should be flushed - Answer every month Excess nitrate causes a condition called - Answer blue baby syndrome Water hardness is caused by - Answer calcium and magnesium Sewer mains should be __ft away from water mains. - Answer 9 Water with a pH less than 7 is considered to be - Answer acidic Bacti records are kept for ____yrs and chemical records are kept for ___yrs. - Answer 5, 10 Bacti samples have to be returned to the lab within ___hrs of the collection time. - Answer 30 Color in the water supply should be less than _____ units. - Answer 15 Chlorine is ______ times heavier than air. - Answer 2.5 90% of underground pipe failures are related to improper - Answer backfill and bedding The spoil bank should be located at least ___ft away from the ditch. - Answer 2 The following minimum residuals is ______mg/L for free chlorine and ____mg/L for total chlorine. - Answer .2, .5 Public opinion of the water utility is _______ at a standstill. - Answer never A bacti sample should be taken every ____ft of pipe. - Answer 1000 The most common collection point for a bacti sample is the water tap _______. - Answer outside the house A standpipe is considered ground storage unless it exceeds _____ft above the highest ________. - Answer 80, service connection ________ protection is the electrochemical method for preventing ________ of metal tanks. - Answer cathodic, corrosion The _____ is the only cross connection control method approved by _______. - Answer air gap, tceq _______ on a pipeline depend on the _____ or coefficient of pipe roughness. - Answer friction loss, c factor __________ occurs whenever there is a ______ in the velocity or direction of water flow. - Answer water hammer, sudden change The ______ water pressure required by the rules and regulations is ____psi under any and all conditions. - Answer minimum, 20 100, 150, 200 and 250 are approved classes of _____ _____. - Answer working pressure ______ is used to anchor pipe bends. - Answer concrete A general deposit of mineral particles evenly along the inside of the pipe is ________. - Answer tuberculation Shoring should be used if a ditch is ___ft or deeper. - Answer 5 A written sample writing plan is required for _______ monitoring. - Answer coliform Ladders should be placed every ___ft in a ditch. - Answer 25 An oxygen deficient atmosphere is defined as one which contains _____ than ______ % oxygen. - Answer less, 19.5 Characteristics of a Centrifugal Pump: as the head _____ the discharge ________. - Answer increases, decreases The operator should leave a ________ of slack in flexible tubing. - Answer gooseneck The most common type of water meter is the ____ ____ meter. - Answer positive displacement Safe withdrawal weight from a 150lb cylinder is ___lbs and 400lbs from a ____ton cylinder. - Answer 40, 1 The most common valve is the _______. - Answer gate valve The most commonly used fire hydrants used in distribution systems are the _________. - Answer dry barrel