WATER OPERATOR “D”WATER
QUESTIONS AND CORRECT
ANSWERS
What is the name of the State Agency responsible for enforcing the Safe Drinking Wate
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r Program in Texas? - ans-
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Texas Commission on Environmental Quality (formally known as TNRCC)
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What minerals are associated with water hardness? - ans-calcium and magnesium
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A public water system MUST at all times provide - - ans-Adequate quantity of water
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Adequate water pressure ws ws
Adequate Disinfection ws
All of the Above
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A source of Groundwater would be - - ans-Aquifer
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Fecal cooliform organisms sometimes found in water supplies are an indication - ans-
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The Water supply is contaminated
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Harmful bacteria may be present ws ws ws ws
Possible pathogenic organisms are in the water
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The water is unsuitable for drinking
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All the above
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A disease that May be spread by inadequately disinfected water is - - ans-dysentery
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One method to determine the drawdown of a water well is - - ans-An air line
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The pH of water indicates - - ans-If it is more acid or base
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Assuming you collect more than one bacteriological sample monthly and your system r
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eceives notification from the lab that one of the samples taken in the distribution syste
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, m comes back positive -
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your repeat sample(s) must be taken within________________________
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hours (excluding weekends) and a total of_______________________repeat
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samples must be collected for each positive? - ans-
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24 hours & 3 repeat samples for each positive
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Water that is considered neutral is expressed on the pH scale at - - ans-7.0
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Which of the following is a required step in collecting a routine distribution sample for b
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acteriological testing? - ans-Use of an approved, sterile sample container
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Potable water means the water is - - ans-Maintained at adequate pressure
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Pathogen free ws
Contains a chlorine residual ws ws ws
All the above
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Which of the following is an acceptable disinfection residual at the far reaches of the di
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stribution system - - ans-0.2 mg/L free chlorine residual
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0.5 mg/L chloramine residual for a surface water supply.
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0.8 mg/L chloramine residual when using chloramine treatment
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0.5 mg/L free chlorine residual for a groundwater supply
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All the above
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One gallon of water weighs - ans-8.34 pounds
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One foot of water inside a storage vessel will raise a pressure gauge at the bottom of t
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he vessel by - - ans-.433 lbs
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Common type(s) of pump(s) for use in water wells are - - ans-Vertical Turbine
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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
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If and when a health hazard contamination event occurs in a public water System, the
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operator must contact the state regulatory authority within______________hours by tel
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ephone. - ans-24 hours ws ws ws
According to the lead and copper rule, pipe and fittings may not contain more than _ le
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ad or solder and flux may not contain more than 0.2 % lead. - ans-0.8
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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
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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
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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 -
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your repeat sample(s) must be taken within________________________
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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
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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
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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
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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
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If and when a health hazard contamination event occurs in a public water System, the
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operator must contact the state regulatory authority within______________hours by tel
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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
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