2025 class a water operator (2025) comprehensive questions and verified detailed
solutions already a+ graded highly recommended|100% correct!!
1 ½ times normal pressure up to 150 pounds, whichever is greater. - -When
pressure testing a new line how much pressure do you add?
--Incomplete form
Not enough sample
Silt or slime in bottle
Positive e-coli - -What would cause a repeat Bac T sample?
--lower area of water - -What area is the Hypolimnion in water
--NSF standard. - -Bleach has to meet what standard
--Lagoons - -What is number one sludge removal process in Texas?
--RO and Nanofiltration - -Which two membranes remove the most NTU?
--Calcium and Magnesium - -Lime and Soda Ash is used for removing?
--Releases CO2 which helps keep hardness in solution. - -What function does
aeration serve in the Lime Soda Ash softening process?
--Cationic polymers. - -What can replace primary coagulation?
--Humic and Fulvic - -Trihalomethanes are formed when chlorine reacts with what
two acids in water?
--Alkalinity - -What chemical analysis deals with changes in color at a pH of either
4.5 or 8.3?
--Alkalinity and pH. - -What laboratory test is the most significant for establishing
chemical dosage for coagulating water?
--Turbidity, pH, and temperature. - -Coagulation is affected by:
--influencing coagulation. - -pH is the single most important factor in
--pH. - -Soda Ash is used in the water treatment process to adjust
--2-4 gpm/ft2. - -The maximum flow rate through a sand filter is
--35 psi - -Minimum pressure in distribution system.
--158-165 degrees Fahrenheit. - -Chlorine cylinders are required to contain fusible
safety device designed to melt at what temperature
--inhalation and explosion. - -What hazards may dust create?
, --400 lbs/day@ 70 degrees F - -Maximum chlorine gas withdrawal rates for ton
container is
--1 and 8 - -The Maximum sustained gas withdrawal rate for vacuum transmission on
150 lb cylinder is__ lb/day/ degree Fahrenheit and __ lbs/day/ Fahrenheit pressure
on Ton containers
--Changes in water source
Change or alteration to the system
Alteration or addition to the treatment facility
A new system of facility is to be built
Changes in water quality
Water supply health hazards - -When must TCEQ be notified? (1-8 BW)
--Prevent work related injuries - -Having a good safety program helps?
--Far reaches of the distribution system. - -Where would you suspect high THM's?
--TTHM .08 mg/L, HAA5 .06 mg/L. - -Disinfection by product MCL's?
--2 NTU settled .1 NTU filtered. - -Settled and filtered water goals.
--evaporation - -Hook gauge evaporimeter is a precision instrument used to measure
changes in water levels due to____.
--2 gpm/ft2 - -Rapid sand filter flow rates? (6-29 SW1)
--Biological Activity Reaction Test - -BART: (5-21 SW2).
--1.0 mg/L, - -MCL for Nitrite
--10 mg/L, - -MCL for Nitrate
--10 mg/L. - -MCL for Nitrite and Nitrate
--would be rescuers. - -60% of confined space fatalities involve
--25 mg/L for 24 hours with a residual of 10 mg/L. 100 mg/L for 3 hours with a
minimum residual of 50 mg/L. - -New main disinfection requires (7-15 Basic Water).
--300 mg/L for 15 minutes with a minimum residual of 100 mg/L (A-11 Water
Distribution). TCEQ allows 500 mg/L for 30 minutes. - -Disinfection of Emergency
mainline repairs (7-15 Basic Water).
--pump impeller - -Water horsepower also called pump output is the horsepower
delivered by the ___.
--Inlet, Settling, Sludge, Outlet. - -What are the 4 zones of a settling basin?
solutions already a+ graded highly recommended|100% correct!!
1 ½ times normal pressure up to 150 pounds, whichever is greater. - -When
pressure testing a new line how much pressure do you add?
--Incomplete form
Not enough sample
Silt or slime in bottle
Positive e-coli - -What would cause a repeat Bac T sample?
--lower area of water - -What area is the Hypolimnion in water
--NSF standard. - -Bleach has to meet what standard
--Lagoons - -What is number one sludge removal process in Texas?
--RO and Nanofiltration - -Which two membranes remove the most NTU?
--Calcium and Magnesium - -Lime and Soda Ash is used for removing?
--Releases CO2 which helps keep hardness in solution. - -What function does
aeration serve in the Lime Soda Ash softening process?
--Cationic polymers. - -What can replace primary coagulation?
--Humic and Fulvic - -Trihalomethanes are formed when chlorine reacts with what
two acids in water?
--Alkalinity - -What chemical analysis deals with changes in color at a pH of either
4.5 or 8.3?
--Alkalinity and pH. - -What laboratory test is the most significant for establishing
chemical dosage for coagulating water?
--Turbidity, pH, and temperature. - -Coagulation is affected by:
--influencing coagulation. - -pH is the single most important factor in
--pH. - -Soda Ash is used in the water treatment process to adjust
--2-4 gpm/ft2. - -The maximum flow rate through a sand filter is
--35 psi - -Minimum pressure in distribution system.
--158-165 degrees Fahrenheit. - -Chlorine cylinders are required to contain fusible
safety device designed to melt at what temperature
--inhalation and explosion. - -What hazards may dust create?
, --400 lbs/day@ 70 degrees F - -Maximum chlorine gas withdrawal rates for ton
container is
--1 and 8 - -The Maximum sustained gas withdrawal rate for vacuum transmission on
150 lb cylinder is__ lb/day/ degree Fahrenheit and __ lbs/day/ Fahrenheit pressure
on Ton containers
--Changes in water source
Change or alteration to the system
Alteration or addition to the treatment facility
A new system of facility is to be built
Changes in water quality
Water supply health hazards - -When must TCEQ be notified? (1-8 BW)
--Prevent work related injuries - -Having a good safety program helps?
--Far reaches of the distribution system. - -Where would you suspect high THM's?
--TTHM .08 mg/L, HAA5 .06 mg/L. - -Disinfection by product MCL's?
--2 NTU settled .1 NTU filtered. - -Settled and filtered water goals.
--evaporation - -Hook gauge evaporimeter is a precision instrument used to measure
changes in water levels due to____.
--2 gpm/ft2 - -Rapid sand filter flow rates? (6-29 SW1)
--Biological Activity Reaction Test - -BART: (5-21 SW2).
--1.0 mg/L, - -MCL for Nitrite
--10 mg/L, - -MCL for Nitrate
--10 mg/L. - -MCL for Nitrite and Nitrate
--would be rescuers. - -60% of confined space fatalities involve
--25 mg/L for 24 hours with a residual of 10 mg/L. 100 mg/L for 3 hours with a
minimum residual of 50 mg/L. - -New main disinfection requires (7-15 Basic Water).
--300 mg/L for 15 minutes with a minimum residual of 100 mg/L (A-11 Water
Distribution). TCEQ allows 500 mg/L for 30 minutes. - -Disinfection of Emergency
mainline repairs (7-15 Basic Water).
--pump impeller - -Water horsepower also called pump output is the horsepower
delivered by the ___.
--Inlet, Settling, Sludge, Outlet. - -What are the 4 zones of a settling basin?
