Page 1 of 50
08 June 2026
Florida Class C Water Treatment Operator Exam 2026/2027
Prep Test Bank with 600 Most Recent Questions and
Correct Verified Answers/ FL Class C Water Operator Test
Latest (Brand New!)
What is an Ampere? - correct answer-a unit of measurement for current
Which of the following is a type of pump that is commonly used in a water treatment plant? -
correct answer-Centrifugal
What is a multi-staged pump? - correct answer-has more than one impeller
if the pump impeller is running backwards, what action must be taken to correct the rotation? -
correct answer-switch any two electrical leads
When should the packing of a pump be adjusted? - correct answer-when the pump is running
when a pump fails to deliver at its rated capacity, what is most likely the cause? - correct answerair
leak
what is a common cause for vibrations in a motor? - correct answer-misalignment of the couplings
What is the purpose of the wear rings in a pump? - correct answer-Plug internal leakage
what should the seal water pressure be for a pump? - correct answer-5 psi higher than the pumps
discharge pressure
what is the purpose of the seal water? - correct answer-block out air intake and lubricate the
packing
what is the recommended maximum suction lift? - correct answer-15 ft.
, Page 2 of 50
08 June 2026
In a water treatment plant, what type of pump is commonly used to deliver chemical solutions? -
correct answer-Positive displacement
when should you lubricate your equipment? - correct answer-follow the manufacturer's
recommendations
In what manner is packing installed? - correct answer-a strip at a time and staggered
a positive displacement pump should never be operated________? - correct answer-against a
closed discharge valve
if two of more pumps of the same size and purpose are online, what method of operation is
recommended for them? - correct answer-alternate to equalize wear
If half of the mechanical seal fails, what corrective action should be taken? - correct answer-change
both halves of the seal
what is the purpose of a lantern ring? - correct answer-water seal
The packing of a pump should be adjusted to _________? - correct answer-allow a slight operating
leakage and allow approximately a drip per second.
On a multiple drive motor, when a belt fails, what corrective action should be taken? - correct
answer-Replace all the belts on the drive
To keep a centrifugal pump primed, install a _______ valve at the end of the suction line. - correct
answer-foot valve
If a motor fails to start, what should be checked first? - correct answer-Power supply
Opening or closing a valve rapidly will cause? - correct answer-water hammer
, Page 3 of 50
08 June 2026
The formation and collapse of a gas pocket or bubble on the blade of an impeller is called? - correct
answer-cavitaion
Changing the packing on a pump is called ________ maintenance - correct answer-corrective
what is an example of a daily maintenance task for a compressor? - correct answer-drain the air
receiver
what type of valve is usually used to control the rate of flow? - correct answer-globe valve
what type of valve is buried? - correct answer-non-rising stem
what is the most common valve type used in a water treatment plant? - correct answer-gate valve
what will happen if the gate valve is left half open to control flow? - correct answer-Undue seat
wear
In what manner should carbon be stored? - correct answer-on concrete floor in single rows
what is brinelling? - correct answer-a type of bearing wear
what is the recommended manner for storing potassium permanganate? - correct answer-on a
concrete floor away from heat or heated pipes
what causes more damage to a pump's impeller? - correct answer-Air
What is the unit of electrical resistance? - correct answer-Ohm
What is an ammeter - correct answer-measures amps and current
, Page 4 of 50
08 June 2026
what type of electrical service is usually found in water plants? - correct answer-three phase
Generally, all motors over over two HP require what type of electrical service? - correct answer-3
phase
Before starting work on any electrical equipment, you must first ____? - correct answer-Lock out
tag out
What unit is used to measure the rate of power Consumption? - correct answer-Kilowatts
What is the function of a shear pin? - correct answer-to prevent damage to equipment when there
is an overload
The measurement of how close an instrument determines the true of actual reading of an
instrument is called? - correct answer-Accuracy
The readout of an instrument by the use of a pointer against a scale is an _____ reading? - correct
answer-analog
The device that controls the operation of equipment is called? - correct answer-controller
The readout of an instrument by a direct numerical reading of the measured value id called a
________ reading? - correct answer-digital
what is an instrument's ability to measure a process value and repeatedly obtain the result called? -
correct answer-precision
what is the difference between the actual value and desired value? - correct answer-drift
what is software? - correct answer-computer programs
A device that measures the accumulative amount of a process over a 24 hour period is called? -
correct answer-Totalizer
08 June 2026
Florida Class C Water Treatment Operator Exam 2026/2027
Prep Test Bank with 600 Most Recent Questions and
Correct Verified Answers/ FL Class C Water Operator Test
Latest (Brand New!)
What is an Ampere? - correct answer-a unit of measurement for current
Which of the following is a type of pump that is commonly used in a water treatment plant? -
correct answer-Centrifugal
What is a multi-staged pump? - correct answer-has more than one impeller
if the pump impeller is running backwards, what action must be taken to correct the rotation? -
correct answer-switch any two electrical leads
When should the packing of a pump be adjusted? - correct answer-when the pump is running
when a pump fails to deliver at its rated capacity, what is most likely the cause? - correct answerair
leak
what is a common cause for vibrations in a motor? - correct answer-misalignment of the couplings
What is the purpose of the wear rings in a pump? - correct answer-Plug internal leakage
what should the seal water pressure be for a pump? - correct answer-5 psi higher than the pumps
discharge pressure
what is the purpose of the seal water? - correct answer-block out air intake and lubricate the
packing
what is the recommended maximum suction lift? - correct answer-15 ft.
, Page 2 of 50
08 June 2026
In a water treatment plant, what type of pump is commonly used to deliver chemical solutions? -
correct answer-Positive displacement
when should you lubricate your equipment? - correct answer-follow the manufacturer's
recommendations
In what manner is packing installed? - correct answer-a strip at a time and staggered
a positive displacement pump should never be operated________? - correct answer-against a
closed discharge valve
if two of more pumps of the same size and purpose are online, what method of operation is
recommended for them? - correct answer-alternate to equalize wear
If half of the mechanical seal fails, what corrective action should be taken? - correct answer-change
both halves of the seal
what is the purpose of a lantern ring? - correct answer-water seal
The packing of a pump should be adjusted to _________? - correct answer-allow a slight operating
leakage and allow approximately a drip per second.
On a multiple drive motor, when a belt fails, what corrective action should be taken? - correct
answer-Replace all the belts on the drive
To keep a centrifugal pump primed, install a _______ valve at the end of the suction line. - correct
answer-foot valve
If a motor fails to start, what should be checked first? - correct answer-Power supply
Opening or closing a valve rapidly will cause? - correct answer-water hammer
, Page 3 of 50
08 June 2026
The formation and collapse of a gas pocket or bubble on the blade of an impeller is called? - correct
answer-cavitaion
Changing the packing on a pump is called ________ maintenance - correct answer-corrective
what is an example of a daily maintenance task for a compressor? - correct answer-drain the air
receiver
what type of valve is usually used to control the rate of flow? - correct answer-globe valve
what type of valve is buried? - correct answer-non-rising stem
what is the most common valve type used in a water treatment plant? - correct answer-gate valve
what will happen if the gate valve is left half open to control flow? - correct answer-Undue seat
wear
In what manner should carbon be stored? - correct answer-on concrete floor in single rows
what is brinelling? - correct answer-a type of bearing wear
what is the recommended manner for storing potassium permanganate? - correct answer-on a
concrete floor away from heat or heated pipes
what causes more damage to a pump's impeller? - correct answer-Air
What is the unit of electrical resistance? - correct answer-Ohm
What is an ammeter - correct answer-measures amps and current
, Page 4 of 50
08 June 2026
what type of electrical service is usually found in water plants? - correct answer-three phase
Generally, all motors over over two HP require what type of electrical service? - correct answer-3
phase
Before starting work on any electrical equipment, you must first ____? - correct answer-Lock out
tag out
What unit is used to measure the rate of power Consumption? - correct answer-Kilowatts
What is the function of a shear pin? - correct answer-to prevent damage to equipment when there
is an overload
The measurement of how close an instrument determines the true of actual reading of an
instrument is called? - correct answer-Accuracy
The readout of an instrument by the use of a pointer against a scale is an _____ reading? - correct
answer-analog
The device that controls the operation of equipment is called? - correct answer-controller
The readout of an instrument by a direct numerical reading of the measured value id called a
________ reading? - correct answer-digital
what is an instrument's ability to measure a process value and repeatedly obtain the result called? -
correct answer-precision
what is the difference between the actual value and desired value? - correct answer-drift
what is software? - correct answer-computer programs
A device that measures the accumulative amount of a process over a 24 hour period is called? -
correct answer-Totalizer
