Florida "C" Water Operator/Treatment EXAM - aq aq aq aq aq
600 Study Questions and Answers Latest 2025
aq aq aq aq aq aq aq
what do we call a detailed description of all underground features discovered during well drilling? -
aq aq aq aq aq aq aq aq aq aq aq aq aq aq aq aq
✔️geological log
aq aq
what information is need to calculate the PHs for the langlier index? -
aq aq aq aq aq aq aq aq aq aq aq aq aq
✔️temp, TDS, Alkalinity, Calcium hardness
aq aq aq aq aq
what process is commonly used to remove volatile organics from water? -
aq aq aq aq aq aq aq aq aq aq aq aq
✔️polyphosphates
aq
how often must a water system test for radionuclides? -
aq aq aq aq aq aq aq aq aq aq
✔️3 yrs
aq aq
calculate the amount of water needed to backwash a 360 sq ft dilter at 9000 gpm. the backwash durati
aq aq aq aq aq aq aq aq aq aq aq aq aq aq aq aq aq aq
on is 8 minutes. -
aq aq aq aq aq
✔️72,000 gal
aq aq
in January a 6 ppm Cl2 dosage produced a 2.0 ppm residual. In July an 8 ppm dosage produced a 1.5 pp
aq aq aq aq aq aq aq aq aq aq aq aq aq aq aq aq aq aq aq aq aq
m residual. what is most likely the cause for the lower chlorine residual? -
aq aq aq aq aq aq aq aq aq aq aq aq aq aq
✔️increase in water temperature
aq aq aq aq
why is recarbonation necessary when lime softening is used to reduce excessive hydroxide hardness? -
aq
aq aq aq aq aq aq aq aq aq aq aq aq aq aq
✔️reduce the scale forming tendencies of the supersaturated H2O
aq aq aq aq aq aq aq aq aq
In hot water systems, scaling is a problem because _________ is less soluble in hot H2O than it is in col
aq aq aq aq aq aq aq aq aq aq aq aq aq aq aq aq aq aq aq aq
d H2O. -
aq aq aq
✔️calcium carbonate
aq aq
what is the primary purpose of filters in a WTP? -
aq aq aq aq aq aq aq aq aq aq aq
✔️lower turbidity
aq aq
,a WTP meets or exceeds all treatment parameters. It has started to receive customer complaints conc
aq aq aq aq aq aq aq aq aq aq aq aq aq aq aq
erning red water in the distribution system. Polyphosphate is being used in the treatment process. wh
aq aq aq aq aq aq aq aq aq aq aq aq aq aq aq
at is most likely causing the red water? -
aq aq aq aq aq aq aq aq aq
✔️polyphosphate reverted to orthophosphate
aq aq aq aq
a well pump is rated at 6000 gpm at 85% efficiency. the well is 15' long, 12' wide, and 10' deep. if the p
aq aq aq aq aq aq aq aq aq aq aq aq aq aq aq aq aq aq aq aq aq aq aq
ump takes 10 minutes to lower the well 5 feet, does it pump higher or lower than rated? -
aq aq aq aq aq aq aq aq aq aq aq aq aq aq aq aq aq aq aq
✔️73 gpm, higher
aq aq aq
what will happen if the recirculation rate for a solid contact unit is too high? -
aq aq aq aq aq aq aq aq aq aq aq aq aq aq aq aq
✔️overflow of slurry to filter
aq aq aq aq aq
if a water sample tests positive for coliform, what action must be taken by the water system? -
aq aq aq aq aq aq aq aq aq aq aq aq aq aq aq aq aq aq
✔️repeat sample 24 hours after notification
aq aq aq aq aq aq
Many samples for MCL compliance are taken in the distribution system. what sample is taken where t
aq aq aq aq aq aq aq aq aq aq aq aq aq aq aq aq
he water enters the distribution system? -
aq aq aq aq aq aq aq
✔️turbidity
aq
What is an Ampere? - aq aq aq aq aq
✔️a unit of measurement for current
aq aq aq aq aq aq
Which of the following is a type of pump that is commonly used in a water treatment plant? -
aq aq aq aq aq aq aq aq aq aq aq aq aq aq aq aq aq aq aq
✔️Centrifugal
aq
What is a multi-staged pump? - aq aq aq aq aq aq
✔️has more than one impeller
aq aq aq aq aq
if the pump impeller is running backwards, what action must be taken to correct the rotation? -
aq aq aq aq aq aq aq aq aq aq aq aq aq aq aq aq aq
✔️switch any two electrical leads
aq aq aq aq aq
When should the packing of a pump be adjusted? -
aq aq aq aq aq aq aq aq aq aq
, ✔️when the pump is running
aq aq aq aq aq
when a pump fails to deliver at its rated capacity, what is most likely the cause? -
aq aq aq aq aq aq aq aq aq aq aq aq aq aq aq aq aq
✔️air leak
aq aq
what is a common cause for vibrations in a motor? -
aq aq aq aq aq aq aq aq aq aq aq
✔️misalignment of the couplings
aq aq aq aq
What is the purpose of the wear rings in a pump? -
aq aq aq aq aq aq aq aq aq aq aq aq
✔️Plug internal leakage
aq aq aq
what should the seal water pressure be for a pump? -
aq aq aq aq aq aq aq aq aq aq aq
✔️5 psi higher than the pumps discharge pressure
aq aq aq aq aq aq aq aq
what is the purpose of the seal water? -
aq aq aq aq aq aq aq aq aq
✔️block out air intake and lubricate the packing
aq aq aq aq aq aq aq aq
what is the recommended maximum suction lift? -
aq aq aq aq aq aq aq aq
✔️15 ft.
aq aq
In a water treatment plant, what type of pump is commonly used to deliver chemical solutions? -
aq aq aq aq aq aq aq aq aq aq aq aq aq aq aq aq aq
✔️Positive displacement
aq aq
when should you lubricate your equipment? -
aq aq aq aq aq aq aq
✔️follow the manufacturer's recommendations
aq aq aq aq
In what manner is packing installed? -
aq aq aq aq aq aq aq
✔️a strip at a time and staggered
aq aq aq aq aq aq aq
a positive displacement pump should never be operated________? -
aq aq aq aq aq aq aq aq aq
✔️against a closed discharge valve
aq aq aq aq aq
, if two of more pumps of the same size and purpose are online, what method of operation is recomme
aq aq aq aq aq aq aq aq aq aq aq aq aq aq aq aq aq aq
nded for them? - aq aq aq aq
✔️alternate to equalize wear
aq aq aq aq
If half of the mechanical seal fails, what corrective action should be taken? -
aq aq aq aq aq aq aq aq aq aq aq aq aq aq
✔️change both halves of the seal
aq aq aq aq aq aq
what is the purpose of a lantern ring? -
aq aq aq aq aq aq aq aq aq
✔️water seal
aq aq
The packing of a pump should be adjusted to _________? -
aq aq aq aq aq aq aq aq aq aq aq
✔️allow a slight operating leakage and allow approximately a drip per second.
aq aq aq aq aq aq aq aq aq aq aq aq
On a multiple drive motor, when a belt fails, what corrective action should be taken? -
aq aq aq aq aq aq aq aq aq aq aq aq aq aq aq aq
✔️Replace all the belts on the drive
aq aq aq aq aq aq aq
To keep a centrifugal pump primed, install a _______ valve at the end of the suction line. -
aq aq aq aq aq aq aq aq aq aq aq aq aq aq aq aq aq aq
✔️foot valve
aq aq
If a motor fails to start, what should be checked first? -
aq aq aq aq aq aq aq aq aq aq aq aq
✔️Power supply
aq aq
Opening or closing a valve rapidly will cause? - aq aq aq aq aq aq aq aq aq
✔️water hammer
aq aq
The formation and collapse of a gas pocket or bubble on the blade of an impeller is called? -
aq aq aq aq aq aq aq aq aq aq aq aq aq aq aq aq aq aq aq
✔️cavitaion
aq
Changing the packing on a pump is called ________ maintenance -
aq aq aq aq aq aq aq aq aq aq aq
✔️corrective
aq
600 Study Questions and Answers Latest 2025
aq aq aq aq aq aq aq
what do we call a detailed description of all underground features discovered during well drilling? -
aq aq aq aq aq aq aq aq aq aq aq aq aq aq aq aq
✔️geological log
aq aq
what information is need to calculate the PHs for the langlier index? -
aq aq aq aq aq aq aq aq aq aq aq aq aq
✔️temp, TDS, Alkalinity, Calcium hardness
aq aq aq aq aq
what process is commonly used to remove volatile organics from water? -
aq aq aq aq aq aq aq aq aq aq aq aq
✔️polyphosphates
aq
how often must a water system test for radionuclides? -
aq aq aq aq aq aq aq aq aq aq
✔️3 yrs
aq aq
calculate the amount of water needed to backwash a 360 sq ft dilter at 9000 gpm. the backwash durati
aq aq aq aq aq aq aq aq aq aq aq aq aq aq aq aq aq aq
on is 8 minutes. -
aq aq aq aq aq
✔️72,000 gal
aq aq
in January a 6 ppm Cl2 dosage produced a 2.0 ppm residual. In July an 8 ppm dosage produced a 1.5 pp
aq aq aq aq aq aq aq aq aq aq aq aq aq aq aq aq aq aq aq aq aq
m residual. what is most likely the cause for the lower chlorine residual? -
aq aq aq aq aq aq aq aq aq aq aq aq aq aq
✔️increase in water temperature
aq aq aq aq
why is recarbonation necessary when lime softening is used to reduce excessive hydroxide hardness? -
aq
aq aq aq aq aq aq aq aq aq aq aq aq aq aq
✔️reduce the scale forming tendencies of the supersaturated H2O
aq aq aq aq aq aq aq aq aq
In hot water systems, scaling is a problem because _________ is less soluble in hot H2O than it is in col
aq aq aq aq aq aq aq aq aq aq aq aq aq aq aq aq aq aq aq aq
d H2O. -
aq aq aq
✔️calcium carbonate
aq aq
what is the primary purpose of filters in a WTP? -
aq aq aq aq aq aq aq aq aq aq aq
✔️lower turbidity
aq aq
,a WTP meets or exceeds all treatment parameters. It has started to receive customer complaints conc
aq aq aq aq aq aq aq aq aq aq aq aq aq aq aq
erning red water in the distribution system. Polyphosphate is being used in the treatment process. wh
aq aq aq aq aq aq aq aq aq aq aq aq aq aq aq
at is most likely causing the red water? -
aq aq aq aq aq aq aq aq aq
✔️polyphosphate reverted to orthophosphate
aq aq aq aq
a well pump is rated at 6000 gpm at 85% efficiency. the well is 15' long, 12' wide, and 10' deep. if the p
aq aq aq aq aq aq aq aq aq aq aq aq aq aq aq aq aq aq aq aq aq aq aq
ump takes 10 minutes to lower the well 5 feet, does it pump higher or lower than rated? -
aq aq aq aq aq aq aq aq aq aq aq aq aq aq aq aq aq aq aq
✔️73 gpm, higher
aq aq aq
what will happen if the recirculation rate for a solid contact unit is too high? -
aq aq aq aq aq aq aq aq aq aq aq aq aq aq aq aq
✔️overflow of slurry to filter
aq aq aq aq aq
if a water sample tests positive for coliform, what action must be taken by the water system? -
aq aq aq aq aq aq aq aq aq aq aq aq aq aq aq aq aq aq
✔️repeat sample 24 hours after notification
aq aq aq aq aq aq
Many samples for MCL compliance are taken in the distribution system. what sample is taken where t
aq aq aq aq aq aq aq aq aq aq aq aq aq aq aq aq
he water enters the distribution system? -
aq aq aq aq aq aq aq
✔️turbidity
aq
What is an Ampere? - aq aq aq aq aq
✔️a unit of measurement for current
aq aq aq aq aq aq
Which of the following is a type of pump that is commonly used in a water treatment plant? -
aq aq aq aq aq aq aq aq aq aq aq aq aq aq aq aq aq aq aq
✔️Centrifugal
aq
What is a multi-staged pump? - aq aq aq aq aq aq
✔️has more than one impeller
aq aq aq aq aq
if the pump impeller is running backwards, what action must be taken to correct the rotation? -
aq aq aq aq aq aq aq aq aq aq aq aq aq aq aq aq aq
✔️switch any two electrical leads
aq aq aq aq aq
When should the packing of a pump be adjusted? -
aq aq aq aq aq aq aq aq aq aq
, ✔️when the pump is running
aq aq aq aq aq
when a pump fails to deliver at its rated capacity, what is most likely the cause? -
aq aq aq aq aq aq aq aq aq aq aq aq aq aq aq aq aq
✔️air leak
aq aq
what is a common cause for vibrations in a motor? -
aq aq aq aq aq aq aq aq aq aq aq
✔️misalignment of the couplings
aq aq aq aq
What is the purpose of the wear rings in a pump? -
aq aq aq aq aq aq aq aq aq aq aq aq
✔️Plug internal leakage
aq aq aq
what should the seal water pressure be for a pump? -
aq aq aq aq aq aq aq aq aq aq aq
✔️5 psi higher than the pumps discharge pressure
aq aq aq aq aq aq aq aq
what is the purpose of the seal water? -
aq aq aq aq aq aq aq aq aq
✔️block out air intake and lubricate the packing
aq aq aq aq aq aq aq aq
what is the recommended maximum suction lift? -
aq aq aq aq aq aq aq aq
✔️15 ft.
aq aq
In a water treatment plant, what type of pump is commonly used to deliver chemical solutions? -
aq aq aq aq aq aq aq aq aq aq aq aq aq aq aq aq aq
✔️Positive displacement
aq aq
when should you lubricate your equipment? -
aq aq aq aq aq aq aq
✔️follow the manufacturer's recommendations
aq aq aq aq
In what manner is packing installed? -
aq aq aq aq aq aq aq
✔️a strip at a time and staggered
aq aq aq aq aq aq aq
a positive displacement pump should never be operated________? -
aq aq aq aq aq aq aq aq aq
✔️against a closed discharge valve
aq aq aq aq aq
, if two of more pumps of the same size and purpose are online, what method of operation is recomme
aq aq aq aq aq aq aq aq aq aq aq aq aq aq aq aq aq aq
nded for them? - aq aq aq aq
✔️alternate to equalize wear
aq aq aq aq
If half of the mechanical seal fails, what corrective action should be taken? -
aq aq aq aq aq aq aq aq aq aq aq aq aq aq
✔️change both halves of the seal
aq aq aq aq aq aq
what is the purpose of a lantern ring? -
aq aq aq aq aq aq aq aq aq
✔️water seal
aq aq
The packing of a pump should be adjusted to _________? -
aq aq aq aq aq aq aq aq aq aq aq
✔️allow a slight operating leakage and allow approximately a drip per second.
aq aq aq aq aq aq aq aq aq aq aq aq
On a multiple drive motor, when a belt fails, what corrective action should be taken? -
aq aq aq aq aq aq aq aq aq aq aq aq aq aq aq aq
✔️Replace all the belts on the drive
aq aq aq aq aq aq aq
To keep a centrifugal pump primed, install a _______ valve at the end of the suction line. -
aq aq aq aq aq aq aq aq aq aq aq aq aq aq aq aq aq aq
✔️foot valve
aq aq
If a motor fails to start, what should be checked first? -
aq aq aq aq aq aq aq aq aq aq aq aq
✔️Power supply
aq aq
Opening or closing a valve rapidly will cause? - aq aq aq aq aq aq aq aq aq
✔️water hammer
aq aq
The formation and collapse of a gas pocket or bubble on the blade of an impeller is called? -
aq aq aq aq aq aq aq aq aq aq aq aq aq aq aq aq aq aq aq
✔️cavitaion
aq
Changing the packing on a pump is called ________ maintenance -
aq aq aq aq aq aq aq aq aq aq aq
✔️corrective
aq
