Water operator “D”water
What is the name of the State Agency responsible for enforcing the Safe Drinking Water
Program in Texas? - ANS- Texas Commission on Environmental Quality (formally known
as TNRCC)
What minerals are associated with water hardness? - ANS- calcium and magnesium
A public water system MUST at all times provide - - ANS- Adequate quantity of water
Adequate water pressure
Adequate Disinfection
All of the Above
A source of Groundwater would be - - ANS- Aquifer
Fecal cooliform organisms sometimes found in water supplies are an indication - ANS-
The 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 - - ANS- dysentery
One method to determine the drawdown of a water well is - - ANS- An air line
The pH of water indicates - - ANS- If 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? - ANS- 24 hours & 3 repeat samples for
each positive
Water that is considered neutral is expressed on the pH scale at - - ANS- 7.0
, Which of the following is a required step in collecting a routine distribution sample for
bacteriological testing? - ANS- Use of an approved, sterile sample container
Potable water means the water is - - ANS- Maintained 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 - - ANS- 0.2 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 - ANS- 8.34 pounds
One foot of water inside a storage vessel will raise a pressure gauge at the bottom of the
vessel by - - ANS- .433 lbs
Common type(s) of pump(s) for use in water wells are - - ANS- Vertical Turbine
Submersible and submersible
_____________________________is the natural exchange of water between the earth and
air - ANS- Hydrological Cycle
If and when a health hazard contamination event occurs in a public water System, the
operator must contact the state regulatory authority within______________hours by
telephone. - ANS- 24 hours
According to the lead and copper rule, pipe and fittings may not contain more than _ lead
or solder and flux may not contain more than 0.2 % lead. - ANS- 0.8
When testing for chlorine residual DPD is used as an indicator, when DPD is added to
water containing chlorine what color does the sample turn? - ANS- red
The most common valve used for isolating a water leak is the___________
valve. - ANS- Gate valve
What is the name of the State Agency responsible for enforcing the Safe Drinking Water
Program in Texas? - ANS- Texas Commission on Environmental Quality (formally known
as TNRCC)
What minerals are associated with water hardness? - ANS- calcium and magnesium
A public water system MUST at all times provide - - ANS- Adequate quantity of water
Adequate water pressure
Adequate Disinfection
All of the Above
A source of Groundwater would be - - ANS- Aquifer
Fecal cooliform organisms sometimes found in water supplies are an indication - ANS-
The 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 - - ANS- dysentery
One method to determine the drawdown of a water well is - - ANS- An air line
The pH of water indicates - - ANS- If 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? - ANS- 24 hours & 3 repeat samples for
each positive
Water that is considered neutral is expressed on the pH scale at - - ANS- 7.0
, Which of the following is a required step in collecting a routine distribution sample for
bacteriological testing? - ANS- Use of an approved, sterile sample container
Potable water means the water is - - ANS- Maintained 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 - - ANS- 0.2 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 - ANS- 8.34 pounds
One foot of water inside a storage vessel will raise a pressure gauge at the bottom of the
vessel by - - ANS- .433 lbs
Common type(s) of pump(s) for use in water wells are - - ANS- Vertical Turbine
Submersible and submersible
_____________________________is the natural exchange of water between the earth and
air - ANS- Hydrological Cycle
If and when a health hazard contamination event occurs in a public water System, the
operator must contact the state regulatory authority within______________hours by
telephone. - ANS- 24 hours
According to the lead and copper rule, pipe and fittings may not contain more than _ lead
or solder and flux may not contain more than 0.2 % lead. - ANS- 0.8
When testing for chlorine residual DPD is used as an indicator, when DPD is added to
water containing chlorine what color does the sample turn? - ANS- red
The most common valve used for isolating a water leak is the___________
valve. - ANS- Gate valve
