Class C Water Operator License Exam Study Guide, Exams of Nursing

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Class C Water Operator License Exam Questions and Answers (Latest Update 2024) Ammonia mixed with chlorine gas creates a - Correct Answer ✅white smoke The most difficult part of a water distribution operator's job. - Correct Answer ✅furnish a continuous supply Physical connection between a safe and potentially unsafe water source. - Correct Answer ✅cross connection A distribution system is a - Correct Answer ✅looped system Dead end mains should be flushed - Correct Answer ✅every month Excess nitrate causes a condition called - Correct Answer ✅blue baby syndrome Water hardness is caused by - Correct Answer ✅calcium and magnesium Class C Water Operator License Exam Questions and Answers (Latest Update 2024) Sewer mains should be __ft away from water mains. - Correct Answer ✅9 Water with a pH less than 7 is considered to be - Correct Answer ✅acidic Bacti records are kept for ____yrs and chemical records are kept for ___yrs. - Correct Answer ✅5, 10 Bacti samples have to be returned to the lab within ___hrs of the collection time. - Correct Answer ✅30 Color in the water supply should be less than _____ units. - Correct Answer ✅15 Chlorine is ______ times heavier than air. - Correct Answer ✅2.5 Class C Water Operator License Exam Questions and Answers (Latest Update 2024) The ______ water pressure required by the rules and regulations is ____psi under any and all conditions. - Correct Answer ✅minimum, 20 100, 150, 200 and 250 are approved classes of _____ _____. - Correct Answer ✅working pressure ______ is used to anchor pipe bends. - Correct Answer ✅concrete A general deposit of mineral particles evenly along the inside of the pipe is ________. - Correct Answer ✅tuberculation Shoring should be used if a ditch is ___ft or deeper. - Correct Answer ✅5 A written sample writing plan is required for _______ monitoring. - Correct Answer ✅coliform Class C Water Operator License Exam Questions and Answers (Latest Update 2024) Ladders should be placed every ___ft in a ditch. - Correct Answer ✅25 An oxygen deficient atmosphere is defined as one which contains _____ than ______ % oxygen. - Correct Answer ✅less, 19.5 Characteristics of a Centrifugal Pump: as the head _____ the discharge ________. - Correct Answer ✅increases, decreases The operator should leave a ________ of slack in flexible tubing. - Correct Answer ✅gooseneck The most common type of water meter is the ____ ____ meter. - Correct Answer ✅positive displacement Safe withdrawal weight from a 150lb cylinder is ___lbs and 400lbs from a ____ton cylinder. - Correct Answer ✅40, 1 Class C Water Operator License Exam Questions and Answers (Latest Update 2024) The most common valve is the _______. - Correct Answer ✅gate valve The most commonly used fire hydrants used in distribution systems are the _________. - Correct Answer ✅dry barrel Hydrants have a _____ point in case the hydrant is struck by a vehicle. - Correct Answer ✅breakaway Controlling valves regulate pressure flow ____ and flow _______. - Correct Answer ✅rates, direction Electricity is the preferred power source for most distribution systems because of ______, reliability and relatively low _______. - Correct Answer ✅availability, cost 5/8 meters need to be tested at least every _____ to _______ yrs. - Correct Answer ✅5, 10 Class C Water Operator License Exam Questions and Answers (Latest Update 2024) A cross-connection is a connection between an _____ and an _______ water supply. - Correct Answer ✅approved, unapproved According to the CDC, which mechanism or problem has caused more waterborne disease outbreaks in the US than any other reported factor? - Correct Answer ✅leaking backflows What type of water meter is used when the water flow widely fluctuates? - Correct Answer ✅compound How can mechanical damage to water meters be avoided? - Correct Answer ✅place it behind the curb and in a meter box A piston meter is a _____ meter. - Correct Answer ✅displacement Class C Water Operator License Exam Questions and Answers (Latest Update 2024) Name one advantage to using centrifugal pumps. - Correct Answer ✅they are easy to repair When residential water meters become worn, they have the tendency to ____ all flows. - Correct Answer ✅under register _____% of the earth's surface is ocean. - Correct Answer ✅75 Out of all the water on earth, less than _____% of freshwater is immediately available to humans. - Correct Answer ✅1 The term associated with water that evaporates from living plants is referred to as _____. - Correct Answer ✅evapotranspiration _____% of all the water on earth is saltwater. - Correct Answer ✅97 Class C Water Operator License Exam Questions and Answers (Latest Update 2024) Bacti sample bottles are prepared with a chemical called _____ before they are sterilized. - Correct Answer ✅sodium thiosulfate Killing disease causing organisms in the water is the primary purpose of ____ in water mains. - Correct Answer ✅disinfection Liquified chlorine gas will expand ____ times its original volume. - Correct Answer ✅460 Chlorine gas is ____ times heavier than breathing air. - Correct Answer ✅2.5 Chlorine gas is considered to be ____% pure. - Correct Answer ✅100 Bleach is approximately _____% pure. - Correct Answer ✅5.25 Class C Water Operator License Exam Questions and Answers (Latest Update 2024) _____ upon and after the shutdown. - Correct Answer ✅meet the customers demands What are the three main components of a centrifugal pump? - Correct Answer ✅impeller, case and shaft Condensation, evaporation, percolation, and precipitation are all components of the _______ cycle. - Correct Answer ✅hydrologic The State requires that _____ _____ be kept in storage for disinfection of new water lines. - Correct Answer ✅calcium hypochlorite If a major chlorine leak occurs, call the supplier and the _____. - Correct Answer ✅tceq Powder activated carbon is commonly used to treat ____ and ____ problems in water. - Correct Answer ✅taste, odor Class C Water Operator License Exam Questions and Answers (Latest Update 2024) The primary goal of coagulation, sedimentation and filtration is to remove ____. - Correct Answer ✅turbidity The 2 pathogenic protozoans resistant to chlorination are: __________. - Correct Answer ✅giardia and cryptosporidium The process of separating floc from water by gravity is called ____. - Correct Answer ✅sedimentation ______ is the last barrier between the public and giardia or cryptosporidium. - Correct Answer ✅filtration All public water systems in Texas are required to use _____ as the final disinfectant. - Correct Answer ✅chlorine Water is stored to meet peak demand and to allow production facilities to operate at _______ rates. - Correct Answer ✅uniform Class C Water Operator License Exam Questions and Answers (Latest Update 2024) Ground water supply systems serving more than ___ connections must have a total ground storage capacity of ___ gal/connection and elevated storage capacity of ___ gal/connection or pressure tank capacity of __ gal/connection. - Correct Answer ✅50, 200, 100, 20 The State recommends a TON (Threshold Odor Number) of less than ____. - Correct Answer ✅3 In Texas ___% of water is used for commercial, industrial or agricultural purposes. - Correct Answer ✅75 In Texas ag water demands accounts for about ___% of the total water used. - Correct Answer ✅57 The federal regulator of drinking water is the ___. - Correct Answer ✅epa The primary state regulator of water utilities is the ____. - Correct Answer ✅tceq