Class C Water Operator License
EXAM QUESTIONS WITH CORRECT
SOLUTIONS||100% GUARANTEED
PASS||UPDATED 2026/2027
SYLLABUS||ALREADY GRADED
A+||<<NEWEST VERSION>>
The most common valve is the _______. - ANSWER ✓ gate valve
The most commonly used fire hydrants used in distribution systems are the
_________. - ANSWER ✓ dry barrel
Hydrants have a _____ point in case the hydrant is struck by a vehicle. -
ANSWER ✓ breakaway
Controlling valves regulate pressure flow ____ and flow _______. - ANSWER ✓
rates, direction
Electricity is the preferred power source for most distribution systems because of
______, reliability and relatively low _______. - ANSWER ✓ availability, cost
5/8 meters need to be tested at least every _____ to _______ yrs. - ANSWER ✓ 5,
10
When disinfecting a water line, use ____mg/L of chlorine in the main and let
stand for ____hrs. - ANSWER ✓ 50, 24
When pressure testing the water main, the test pressure should be ___times as
great as the ________ operating pressure. - ANSWER ✓ 1.5, normal
Distribution systems are usually laid out in ____ and/or circular designs. -
ANSWER ✓ loops
, Dead ends in a system are usually located on ____ shaped or ____ designs. -
ANSWER ✓ tree, grid
An operator may refer to Piezometric elevation, static head, or pressure head as
____ height - ANSWER ✓ vertical water column
The main purpose of the water storage facility is to provide ____ amount of water
to average or equalize the ______ demands plus provide ______ pressures to fight
fires. - ANSWER ✓ sufficient, daily, minimum
Electrical demand in a wiring system is determined by the amount of ____
consumed. - ANSWER ✓ watts
Baffling inside a storage facility may be needed to prevent "hot spots" and ____
flows. - ANSWER ✓ straight through
A mass of concrete placed at bends and valve structures to prevent pipeline
movement is commonly called a _____. - ANSWER ✓ thrust block
What is the main difference between surface water and groundwater
contamination? - ANSWER ✓ groundwater takes longer to recover after
contamination
A cross-connection is a connection between an _____ and an _______ water
supply. - ANSWER ✓ approved, unapproved
According to the CDC, which mechanism or problem has caused more waterborne
disease outbreaks in the US than any other reported factor? - ANSWER ✓ leaking
backflows
What type of water meter is used when the water flow widely fluctuates? -
ANSWER ✓ compound
How can mechanical damage to water meters be avoided? - ANSWER ✓ place it
behind the curb and in a meter box
A piston meter is a _____ meter. - ANSWER ✓ displacement
EXAM QUESTIONS WITH CORRECT
SOLUTIONS||100% GUARANTEED
PASS||UPDATED 2026/2027
SYLLABUS||ALREADY GRADED
A+||<<NEWEST VERSION>>
The most common valve is the _______. - ANSWER ✓ gate valve
The most commonly used fire hydrants used in distribution systems are the
_________. - ANSWER ✓ dry barrel
Hydrants have a _____ point in case the hydrant is struck by a vehicle. -
ANSWER ✓ breakaway
Controlling valves regulate pressure flow ____ and flow _______. - ANSWER ✓
rates, direction
Electricity is the preferred power source for most distribution systems because of
______, reliability and relatively low _______. - ANSWER ✓ availability, cost
5/8 meters need to be tested at least every _____ to _______ yrs. - ANSWER ✓ 5,
10
When disinfecting a water line, use ____mg/L of chlorine in the main and let
stand for ____hrs. - ANSWER ✓ 50, 24
When pressure testing the water main, the test pressure should be ___times as
great as the ________ operating pressure. - ANSWER ✓ 1.5, normal
Distribution systems are usually laid out in ____ and/or circular designs. -
ANSWER ✓ loops
, Dead ends in a system are usually located on ____ shaped or ____ designs. -
ANSWER ✓ tree, grid
An operator may refer to Piezometric elevation, static head, or pressure head as
____ height - ANSWER ✓ vertical water column
The main purpose of the water storage facility is to provide ____ amount of water
to average or equalize the ______ demands plus provide ______ pressures to fight
fires. - ANSWER ✓ sufficient, daily, minimum
Electrical demand in a wiring system is determined by the amount of ____
consumed. - ANSWER ✓ watts
Baffling inside a storage facility may be needed to prevent "hot spots" and ____
flows. - ANSWER ✓ straight through
A mass of concrete placed at bends and valve structures to prevent pipeline
movement is commonly called a _____. - ANSWER ✓ thrust block
What is the main difference between surface water and groundwater
contamination? - ANSWER ✓ groundwater takes longer to recover after
contamination
A cross-connection is a connection between an _____ and an _______ water
supply. - ANSWER ✓ approved, unapproved
According to the CDC, which mechanism or problem has caused more waterborne
disease outbreaks in the US than any other reported factor? - ANSWER ✓ leaking
backflows
What type of water meter is used when the water flow widely fluctuates? -
ANSWER ✓ compound
How can mechanical damage to water meters be avoided? - ANSWER ✓ place it
behind the curb and in a meter box
A piston meter is a _____ meter. - ANSWER ✓ displacement
