Water operator “D”water Questions &
Answers
What is the name of the State Agency responsible for enforcing the Safe Drinking Water
Program in Texas? - ANSWERSTexas Commission on Environmental Quality (formally
known as TNRCC)
What minerals are associated with water hardness? - ANSWERScalcium and
magnesium
A public water system MUST at all times provide - - ANSWERSAdequate quantity of
water
Adequate water pressure
Adequate Disinfection
All of the Above
A source of Groundwater would be - - ANSWERSAquifer
Fecal cooliform organisms sometimes found in water supplies are an indication -
ANSWERSThe Water supply is contaminated
Harmful bacteria may be present
Possible pathogenic organisms are in the water
The water is unsuitable for drinking
All the above
, A disease that May be spread by inadequately disinfected water is - -
ANSWERSdysentery
One method to determine the drawdown of a water well is - - ANSWERSAn air line
The pH of water indicates - - ANSWERSIf it is more acid or base
Assuming you collect more than one bacteriological sample monthly and your system
receives notification from the lab that one of the samples taken in the distribution
system comes back positive - your repeat sample(s) must be taken
within________________________
hours (excluding weekends) and a total of_______________________repeat
samples must be collected for each positive? - ANSWERS24 hours & 3 repeat samples
for each positive
Water that is considered neutral is expressed on the pH scale at - - ANSWERS7.0
Which of the following is a required step in collecting a routine distribution sample for
bacteriological testing? - ANSWERSUse of an approved, sterile sample container
Potable water means the water is - - ANSWERSMaintained at adequate pressure
Pathogen free
Contains a chlorine residual
All the above
Which of the following is an acceptable disinfection residual at the far reaches of the
distribution system - - ANSWERS0.2 mg/L free chlorine residual
0.5 mg/L chloramine residual for a surface water supply.
0.8 mg/L chloramine residual when using chloramine treatment
0.5 mg/L free chlorine residual for a groundwater supply
All the above
One gallon of water weighs - ANSWERS8.34 pounds
One foot of water inside a storage vessel will raise a pressure gauge at the bottom of
the vessel by - - ANSWERS.433 lbs
Common type(s) of pump(s) for use in water wells are - - ANSWERSVertical Turbine
Submersible and submersible
_____________________________is the natural exchange of water between the earth
and air - ANSWERSHydrological Cycle
Answers
What is the name of the State Agency responsible for enforcing the Safe Drinking Water
Program in Texas? - ANSWERSTexas Commission on Environmental Quality (formally
known as TNRCC)
What minerals are associated with water hardness? - ANSWERScalcium and
magnesium
A public water system MUST at all times provide - - ANSWERSAdequate quantity of
water
Adequate water pressure
Adequate Disinfection
All of the Above
A source of Groundwater would be - - ANSWERSAquifer
Fecal cooliform organisms sometimes found in water supplies are an indication -
ANSWERSThe Water supply is contaminated
Harmful bacteria may be present
Possible pathogenic organisms are in the water
The water is unsuitable for drinking
All the above
, A disease that May be spread by inadequately disinfected water is - -
ANSWERSdysentery
One method to determine the drawdown of a water well is - - ANSWERSAn air line
The pH of water indicates - - ANSWERSIf it is more acid or base
Assuming you collect more than one bacteriological sample monthly and your system
receives notification from the lab that one of the samples taken in the distribution
system comes back positive - your repeat sample(s) must be taken
within________________________
hours (excluding weekends) and a total of_______________________repeat
samples must be collected for each positive? - ANSWERS24 hours & 3 repeat samples
for each positive
Water that is considered neutral is expressed on the pH scale at - - ANSWERS7.0
Which of the following is a required step in collecting a routine distribution sample for
bacteriological testing? - ANSWERSUse of an approved, sterile sample container
Potable water means the water is - - ANSWERSMaintained at adequate pressure
Pathogen free
Contains a chlorine residual
All the above
Which of the following is an acceptable disinfection residual at the far reaches of the
distribution system - - ANSWERS0.2 mg/L free chlorine residual
0.5 mg/L chloramine residual for a surface water supply.
0.8 mg/L chloramine residual when using chloramine treatment
0.5 mg/L free chlorine residual for a groundwater supply
All the above
One gallon of water weighs - ANSWERS8.34 pounds
One foot of water inside a storage vessel will raise a pressure gauge at the bottom of
the vessel by - - ANSWERS.433 lbs
Common type(s) of pump(s) for use in water wells are - - ANSWERSVertical Turbine
Submersible and submersible
_____________________________is the natural exchange of water between the earth
and air - ANSWERSHydrological Cycle
