TCEQ Class A Preparation Guide for Texas Water Operator Licensing Exam 2024-2025, Exams of Nursing

Download TCEQ Class A Preparation Guide for Texas Water Operator Licensing Exam 2024-2025 and more Exams Nursing in PDF only on Docsity! TCEQ Class A prep Part 1 Exam-with 100% verified solutions 2024-2025-tutor verified In Texas, water operator licensing is administer by the? TCEQ Which minerals cause hardness in water magnesium and calciumT the most importan federal law impacting the water utility industry is Safe Drinking Water Act The four water quality standards established for drinking water in the Safe Drinking Water Act are chemical, bacteriological,radiological and chemical, bacteriological,radiological and physical. The minimue allowable pressure in the distribution system under emergency conditions is 20 psi Water vapor given off by plants and trees is know as tranpiration organic matter includes wood,dogs,algae,bacteria The single most important water treatment process is disinfection excessive nitrates in drinking water can cause what syndrom in infants blue baby A sanitary control easement must cover land within how many feet of a public water well 150 feet A sample for physical and chemical analysis of a new well must be taken after how many hours of continuous pumping 36 hours Chapter 290 Rules and Regulations requries chemical analysis of water supplies every year Detention time in sedimetation basins must be at least how many hours to allow floc to settle six backwashing should expand the filter media by 30 to 50 percent In Texas, all public water systems are required to have what facilities chlorination The MCL for Trihalomethanes in drinking water is 0.080 mg/l At room temperatures chlorine gas is greenish-yellow , has pungent odor, and is 2.5 heaver then air mgdx8.34.50 is your normal forumal to find lbs of chlorine. how ever we need that is for 100 % we have 65% so you will need to .7mgdx8.34x50mg/l /.65 =449.07 The minimum residual water pressure required by Rules and Regulations for publics water systems (30 TAC Chapter 290 subchapter D ) is 20 psi under demand conditions Dead end mains should be flushed every month water hardness is caused by calcium and magnesium salts transpiration is the release of water vapor into the air by plants The presents of nitrates in water can cause blue babies The federal agency that provides standard for maximum allowable concentrations of inorganics chemicals in potable water is The Environmental protection Agency A fire hydrant thrust block will have to be largest in Peat The term "head" as applied to water pressure means height in feet of water colume The four common classes of working pressure in water mains are 100 psi, 150 psi, 200 psi, 250 psi, surface load is the weight of traffic on the pipe Check valves on the discharge side of a pump are used to- keep water from flowing back through the pump when it is shut off How far do fire hydrant have to be, both vertically and horizontally, from any sanitary sewer ? 9 feet What is the capacity of elevated storage reservoirs required to maintain adequate watwe pressure according to the Rules and Regulations for public water systems 100 gallons per connection Cathodic protection is and electrochemical means of preventing corrosion on tank surfaces below the water line. The most common type of pump used in water distribution system is the centrifugal pump What is required to overcome the resistance to flow in the pipe and fittings? horsepower The meter most commonly used for residential customers is the? postive displacement meter The meter which is accurate over a wide ranger of flows in the? compound meter the spoil bank should be located at least 2 feet from the edge of the trench 90 % of of underground pipe failures are related to improper backfill and lack of proper bedding find the surface area of the pipe 3.14 x 1x1 x250=785 then devide it by 27 to get the cubic yards =29.07 Neglecting friction, how many 6 inch water lines would be required to carry the same amount of water as one 12 inch water line N=(diam of larger pipe / diam of smaller pipe) squired (12/6) ^2 = 4 so 4 6inch water lines will equal 1 12 inch line with out friction loss Considering friction , how many 6 inch water lines would be required to carry the same amount of water as one 12 inch water line ? N=diam of larger pipe/ doam of smaller pipe )^5/2 (12/6)^(5/2)=5.65 The requirement to preform Customer Service Inspections based in law in the Texas Health and Safety Code A Customer Service Inspection must be performed When the water purveyor has reason to believed that cross-connections' exist, after any material improvements, corrections, or additions. Prior to providing continuing water service to new construction. Which individual can Not perform a Customer Service Inspection? Licensed Plumbers To qualify for a Customer Service Inspection an individual must have Worked one year in an approved area and have an additional 20 hours of training. one year of college (32 semester hours) and worked one year in approved area. Worked at least two years in an approved area. Containment is described as : Protection of the public water supply at the service connection and premises location Isolation is described as : Protection at each fixture ,outlet, appliance appurtenance Internal protection Which 2 codes are the approved plumbing codes for the state of Texas as of 2001? Uniform Plumbing Code and International Plumbing Code Which one is Not a minimum requirement for a Water Supply Protection Program? Certificate if Insurance from Texas Department of Insurance All backflow Prevention Assemblies are required to be tested Upon installation A Customer Service Inspection is An examination of the private water distribution facilities Potable water connected to water unknow quality would be Cross-connection Proper installation for an Air Gap is two times the pipe diameter but not less than 1" A PVB must be installed above all downstream piping and openings a minimum of ? 12 inches An assembly containing two check valves, two shutoff valves and four test cocks is a Double Check valve Assembly Which of these would create a closed system? Backflow Prevention Assemblies What item is not usually needed to perform a Customer Service Inspection? Backflow test Repair form A structure 100 feet tall. Assuming the building has water lines all the way to the top , the pressure at ground level would apprxomatley what? 100 feet/ 2.31 to get psi per foot , it would be 43.3 Ground water occurs in porous, water baring formations called? aquifers The law which gives the landowner the right to the ground water under that land is ? the doctrine of riparian rights The term for the percentage of a formation that is occupies by pores of spaces is Porosity- think sponge Discharge from an aquifer includes Wells Seepage Springs Taste and odors in ground water are commonly caused by? Disinfectant residuals Hydrogen sulfide Hardness in water is caused by calcium and magnesium Because it is filtered through earth material, ground water is usually free of ? Turbidity The presence of iron in ground water is most often treated by? aeration and filtration The best level of fluoride for preventing cavities is approximately 1.0 mg/L The amount of chlorine used by reducing agents and organic matter is called ? Demand Self contained air supplies should be available where? Outside the chlorinator room, and within reach of anyone who is train to use it To be effective, chlorination should operate Continuously- any time water is being made The purpose of the well casing and pressure cementing To protect the well from collapse and surface contamination The length of an air line in a well is 150 feet. With the pump running , the gauge reads 10 psi , the pumping level is? find the feet from the 10 psi so 10x2.31 = 23.1 subtracted that from the full footage so 150-23.1=126.9 A record of the different layers of rock found in drilling well is a ? Drilling log A field using wastewater effluent for irrigation should be separated from a well by at least 500 feet Developing a well refers to Removing fine sand and drilling mud