Water Distribution Manager 1 Exam Review Questions and Answers 100% Correct., Exams of Water Resources Planning and Management

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Water Distribution Manager 1 Exam

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What is the maximum disinfecting residual for chlorine - ANSWER-4ppm (mg/l) Primary health effect associated with nitrates in water? - ANSWER-"Blue Baby Syndrome" (methemoglobinemia) Maximum contaminate level for fluoride - ANSWER-4ppm (mg/l) Maximum contaminate level for nitrate? - ANSWER-10mg/l (ppm) What is the "trigger" level of nitrates - ANSWER-5 ppm (mg/l What two elements are associated with water hardness - ANSWER-Calcium & Magnesium Which sampling event involves obtaining the results by calculating the 90th percentile? - ANSWER-Lead & Copper Primary MCLs are? - ANSWER-Primary MCL= Health concern Secondary MCLs are? - ANSWER-aesthetic concerns (Taste, odor, color, etc.) What is the ph scale? - ANSWER-Acidic 0 -14 Basic What is the white powder in bacteria sampling bottles? - ANSWER-Sodium Thiosulfate What is the purpose of Sodium thiosulfate? - ANSWER-Used to deactivate chlorine sample What is the static level in and aquifer mean? - ANSWER-The level that the aquifer sits at when the pump is shut off What is the Draw down in an aquifer? - ANSWER-The difference between the static level and pumping level What is the cone of depression? - ANSWER-the shape that the water table takes on near a pumping well

What is the maximum number of operators that a supervisor should manage? - ANSWER-Six operators What must a utility manager have to prepare a good budget? - ANSWER-Good, detailed records from the previous year What does "Authority" mean? - ANSWER-Power and resources to do a job When was the Safe Drinking Water Act passed? - ANSWER- When was the Safe Drinking Water Act revised? - ANSWER-1983 & 1996 What should a manager look at as a first step in capital planning? - ANSWER-Changes in the community What is the main intent of OSHA regulation? - ANSWER-To create a safe work environment for employees How do you find the median of a range of numbers? - ANSWER-the middle number of the range of numbers (Put numbers in numerical order and find the middle number) How many service connections does it take for a water system to be classified as a group B water system? - ANSWER-2-14 service How many service connections does it take for a water system to be classified as a group A water system? - ANSWER-15 or more services Occupied trenches must have and exit every ___ feet - ANSWER-25 feet Class A fire extinguisher put out what type of fires - ANSWER-Wood, paper, rubbish Class B fire extinguisher put out what type of fires - ANSWER-Oil, solvents, gasoline Class C fire extinguisher put out what type of fires - ANSWER-Electrical Class D fire extinguisher put out what type of fires - ANSWER-Flammable Metals Trench cave-in protection includes: - ANSWER-Shoring, Sloped trench walls, trench shields, evacuation ladders Traffic control zones consist of? - ANSWER-Advanced warning, Transition, Buffers, Work Area, Termination zone Flaggers on projects in the street should be positioned how many feet in front of work being done? - ANSWER-100 feet in front of project

What is the first saftey measure in operator should take when entering a chlorination room? - ANSWER-Make sure ventilation system is working What type of gloves provide the best protection against sparks, chips, and moderate heat? - ANSWER-Leather gloves What is the most toxic gas encountered in man holes? - ANSWER-Hydrogen Sulfide (Rotten egg smell) When a permit required confined space must be entered what is the minimum number of workers that should be present? - ANSWER-2 workers Trenches or excavation sites that are ___ feet deep require cave-in protection - ANSWER-5 feet What information should be on the warning tag attached to a switch that has been locked out? - ANSWER-Signiture of the person who locked out the switch, and who is authorized to remove the tag. Fires in electrical equipment should be extinguished using? - ANSWER-Class C extinguishers (dry chemicals) What is the maximum daily removal of chlorine from a 150lb. Cylinder - ANSWER- lbs. per day What are the primary purposes of Resevoirs? - ANSWER-Fire flow, abundant supply, Equalize pressure, Meet peak demand, chlorine contact time What does the "C" factor in a pipe refer too? - ANSWER-Refers to the roughness of the pipe. The higher the C factor the smoother the pipe. What does chlorine do to virus's in water? - ANSWER-Deactivates them What does chlorine do to Bacteria in water? - ANSWER-Kills the bacteria 1psi of water= ____ feet of water - ANSWER-2.31 ft