TCEQ Class D Water Operators License Exam Questions and Complete Solutions.

TCEQ Class D Water Operators License Exam Questions and Complete Solutions Water Covers _______ of the earth's Surface - Answer: 75% Humans can only live ________ days without water - Answer: 4-5 Days Maximum Daily Demand can be determined - Answer: From monthly operating reports or by multiplying 2.4 times the average daily demand on the system. 130 - Answer: Utilities that provide fire protection have to have a minimum of ____ Gallons per person per day 75% - Answer: Commercial, Industrial, and Agricultural Use makes up _____ % in Texas 57% - Answer: Agricultural use accounts for _____% of total water consumed in Texas 97% - Answer: _____% of the total volume of water available is saltwater 1% - Answer: 3% of total volume of water available is considered fresh water. 2% is locked in polar icecaps and glaciers. ____% of all water on earth is accessible fresh water. Electrodialysis Reversal (EDR) - Answer: Electrochemical separation process in which saline water passes through alternately placed cations and anion membranes. reverse osmosis - Answer: A desalinization process that involves forcing salt-water through a membrane permeable to water but not to salt 2000 - Answer: Excluding outside use, the average household uses about _____ gallons of water per month on inside use True - Answer: True or False: only about 1 gallon of tap water per person/day is used for drinking and cooking demand - Answer: Monitoring average and maximum daily water _____ enables us to plan ahead for growth. potable - Answer: suitable for drinking Safe Drinking Water Act (1974) - Answer: The federal regulation of drinking water is done by the U.S. Environmental Protection Agency (EPA), which sets the drinking water quality standards and enforces this standards through a federal law known as the Public Water System - Answer: Providing the public water for human consumption through pipes or other constructed conveyances Requirements of a public water system - Answer: 1. Have at least 15 service connections or 2. Serve at least 25 individuals at least 60 days out of the year. Community - Answer: System has potential to serve at least 15 residential service connections on a year-round basis or serve at least 25 full time residents on a year round basis. nontransient noncommunity - Answer: System serves at least 25 of the SAME people who do not live at that location at least 6 months out of the year. Transient non-community - Answer: Public water system serves at least 25 persons of a transient nature at least 60 days out of the year. 2 years - Answer: Records Kept Required: amount of chemicals used, volume of water treated, complaint log, dead-end line flushing, cleaning records of water storage tanks 3 years - Answer: Records Kept Required: notices of violation, public notices, distribution disinfectant residual tests, turbidity monitoring results, instrument calibration records, back flow prevention assembling testing forms 5 years - Answer: Records Kept Required: microbiological analysis results, water storage tank inspection reports, consumer confidence reports or CCR 10 years - Answer: Chemical analysis of treated water, monthly operating report MOR , sanitary survey inspection reports CCI, customer service inspection records percolate - Answer: To drip into the ground recharging aquifers 15 - Answer: The state recommends ________ color units or less for drinking water. deeper - Answer: The _______ the well, the warmer the water heavier - Answer: Cold water is _________ than warm water Turbidity - Answer: Suspended matter in water 0.3 NTU or less at least 95% of the time. Can never exceed 1.0 NTU. - Answer: TCEQ requires a combined filter effluent (CFE) turbidity of Hardness - Answer: Dissolved salts of calcium and magnesium cause ______ in water True - Answer: True/False: The threshold odor number (TON) relates to the number of dilutions needed for the water to be tasteless 3 - Answer: The state recommends a TON of _______ or less interchangeable - Answer: The terms mg/L and ppm are ________ Total Coliform group - Answer: To avoid having to test a water sample for all diseases, a certain group of bacteria is used to indicate the possible presence of a pathogen - THE _____ >10 mg/l ; >1 mg/L - Answer: Levels of Nitrate and Nitrite that put infants under 6 months of age and pregnant women at risk of "blue baby" syndrome. (0.8 to 1.0 mg/L) - Answer: Optimum concentration of Fluoride 0.015 / 1.3 - Answer: The action level for lead is _______ Mg/L and for copper it is ________ Mg/L 0.2 mg/L - Answer: A minimum free chlorine residual of ___ mg/L is required 0.5 Mg/L - Answer: A minimum combined/total residual of ____ mg/L is required 4.0 Mg/L - Answer: Residual shall not surpass ______ Mg/L 40 - Answer: The maximum sustained gas withdrawal rate for a pressure transmission 150 pound cylinder is about ______ pounds per day 335 lbs per day - Answer: Maximum sustained pressure transmission rate for a ton cylinder is about____ 9;20 - Answer: Texas has _____ major and _____ minor aquifers which supply about 56% of the freshwater, about 80% of Irrigiation water and serve about 1/2 of the states population 50 feet - Answer: No public well site Can be within _____ feet of live stock in pastures or within _____ feet of a tile or concrete sanitary sewer 150 feet - Answer: No public Wells Sight can be within ____ feet of a septic tank drainfield, OSSF spray irrigation, improperly constructed water well 300 ft - Answer: No public well sight can be within _____ feet of a sewage wet well or lift station 0.6 GPM - Answer: TCEQ requires community ground water systems with storage to have a minimum well pumping capacity of _____ GPM per connection served