WATER OPERATOR “D”WATER QUESTIONS AND CORRECT ANSWERS

WATER OPERATOR “D”WATER
QUESTIONS AND CORRECT
ANSWERS

What is the name of the State Agency responsible for enforcing the Safe Drinking Wate
ws ws ws ws ws ws ws ws ws ws ws ws ws ws



r Program in Texas? - ans-
ws ws ws ws ws



Texas Commission on Environmental Quality (formally known as TNRCC)
ws ws ws ws ws ws ws ws




What minerals are associated with water hardness? - ans-calcium and magnesium
ws ws ws ws ws ws ws ws ws ws




A public water system MUST at all times provide - - ans-Adequate quantity of water
ws ws ws ws ws ws ws ws ws ws ws ws ws ws



Adequate water pressure ws ws



Adequate Disinfection ws



All of the Above
ws ws ws




A source of Groundwater would be - - ans-Aquifer
ws ws ws ws ws ws ws ws




Fecal cooliform organisms sometimes found in water supplies are an indication - ans-
ws ws ws ws ws ws ws ws ws ws ws ws



The Water supply is contaminated
ws ws ws ws




Harmful bacteria may be present ws ws ws ws




Possible pathogenic organisms are in the water
ws ws ws ws ws ws




The water is unsuitable for drinking
ws ws ws ws ws




All the above
ws ws




A disease that May be spread by inadequately disinfected water is - - ans-dysentery
ws ws ws ws ws ws ws ws ws ws ws ws ws




One method to determine the drawdown of a water well is - - ans-An air line
ws ws ws ws ws ws ws ws ws ws ws ws ws ws ws




The pH of water indicates - - ans-If it is more acid or base
ws ws ws ws ws ws ws ws ws ws ws ws ws




Assuming you collect more than one bacteriological sample monthly and your system r
ws ws ws ws ws ws ws ws ws ws ws ws



eceives notification from the lab that one of the samples taken in the distribution syste
ws ws ws ws ws ws ws ws ws ws ws ws ws ws

, m comes back positive -
ws ws ws ws



your repeat sample(s) must be taken within________________________
ws ws ws ws ws ws ws



hours (excluding weekends) and a total of_______________________repeat
ws ws ws ws ws ws



samples must be collected for each positive? - ans-
ws ws ws ws ws ws ws ws



24 hours & 3 repeat samples for each positive
ws ws ws ws ws ws ws ws




Water that is considered neutral is expressed on the pH scale at - - ans-7.0
ws ws ws ws ws ws ws ws ws ws ws ws ws ws




Which of the following is a required step in collecting a routine distribution sample for b
ws ws ws ws ws ws ws ws ws ws ws ws ws ws ws



acteriological testing? - ans-Use of an approved, sterile sample container
ws ws ws ws ws ws ws ws ws




Potable water means the water is - - ans-Maintained at adequate pressure
ws ws ws ws ws ws ws ws ws ws ws



Pathogen free ws



Contains a chlorine residual ws ws ws



All the above
ws ws




Which of the following is an acceptable disinfection residual at the far reaches of the di
ws ws ws ws ws ws ws ws ws ws ws ws ws ws ws



stribution system - - ans-0.2 mg/L free chlorine residual
ws ws ws ws ws ws ws ws




0.5 mg/L chloramine residual for a surface water supply.
ws ws ws ws ws ws ws ws




0.8 mg/L chloramine residual when using chloramine treatment
ws ws ws ws ws ws ws




0.5 mg/L free chlorine residual for a groundwater supply
ws ws ws ws ws ws ws ws




All the above
ws ws




One gallon of water weighs - ans-8.34 pounds
ws ws ws ws ws ws ws




One foot of water inside a storage vessel will raise a pressure gauge at the bottom of t
ws ws ws ws ws ws ws ws ws ws ws ws ws ws ws ws ws



he vessel by - - ans-.433 lbs
ws ws ws ws ws ws




Common type(s) of pump(s) for use in water wells are - - ans-Vertical Turbine
ws ws ws ws ws ws ws ws ws ws ws ws ws



Submersible and submersible ws ws




_____________________________is the natural exchange of water between the earth ws ws ws ws ws ws ws ws w



and air - ans-Hydrological Cycle
s ws ws ws ws




If and when a health hazard contamination event occurs in a public water System, the
ws ws ws ws ws ws ws ws ws ws ws ws ws ws ws



operator must contact the state regulatory authority within______________hours by tel
ws ws ws ws ws ws ws ws ws



ephone. - ans-24 hours ws ws ws




According to the lead and copper rule, pipe and fittings may not contain more than _ le
ws ws ws ws ws ws ws ws ws ws ws ws ws ws ws ws



ad or solder and flux may not contain more than 0.2 % lead. - ans-0.8
ws ws ws ws ws ws ws ws ws ws ws ws ws ws