Class C Water Operator License Exam 2026/2027
Questions And Correct Answers Graded A+
A standpipe is considered ground storage unless it exceeds _____ft above the
highest ________.
80, service connection
________ protection is the electrochemical method for preventing ________ of
metal tanks.
cathodic, corrosion
The _____ is the only cross connection control method approved by _______.
air gap, tceq
_______ on a pipeline depend on the _____ or coefficient of pipe roughness.
friction loss, c factor
__________ occurs whenever there is a ______ in the velocity or direction of
water flow.
water hammer, sudden change
,The ______ water pressure required by the rules and regulations is ____psi under
any and all conditions.
minimum, 20
100, 150, 200 and 250 are approved classes of _____ _____.
working pressure
______ is used to anchor pipe bends.
concrete
A general deposit of mineral particles evenly along the inside of the pipe is
________.
tuberculation
Shoring should be used if a ditch is ___ft or deeper.
5
A written sample writing plan is required for _______ monitoring.
coliform
, Ladders should be placed every ___ft in a ditch.
25
An oxygen deficient atmosphere is defined as one which contains _____ than
______ % oxygen.
less, 19.5
Characteristics of a Centrifugal Pump:
as the head _____ the discharge ________.
increases, decreases
The operator should leave a ________ of slack in flexible tubing.
gooseneck
The most common type of water meter is the ____ ____ meter.
positive displacement
Safe withdrawal weight from a 150lb cylinder is ___lbs and 400lbs from a ____ton
cylinder.
Questions And Correct Answers Graded A+
A standpipe is considered ground storage unless it exceeds _____ft above the
highest ________.
80, service connection
________ protection is the electrochemical method for preventing ________ of
metal tanks.
cathodic, corrosion
The _____ is the only cross connection control method approved by _______.
air gap, tceq
_______ on a pipeline depend on the _____ or coefficient of pipe roughness.
friction loss, c factor
__________ occurs whenever there is a ______ in the velocity or direction of
water flow.
water hammer, sudden change
,The ______ water pressure required by the rules and regulations is ____psi under
any and all conditions.
minimum, 20
100, 150, 200 and 250 are approved classes of _____ _____.
working pressure
______ is used to anchor pipe bends.
concrete
A general deposit of mineral particles evenly along the inside of the pipe is
________.
tuberculation
Shoring should be used if a ditch is ___ft or deeper.
5
A written sample writing plan is required for _______ monitoring.
coliform
, Ladders should be placed every ___ft in a ditch.
25
An oxygen deficient atmosphere is defined as one which contains _____ than
______ % oxygen.
less, 19.5
Characteristics of a Centrifugal Pump:
as the head _____ the discharge ________.
increases, decreases
The operator should leave a ________ of slack in flexible tubing.
gooseneck
The most common type of water meter is the ____ ____ meter.
positive displacement
Safe withdrawal weight from a 150lb cylinder is ___lbs and 400lbs from a ____ton
cylinder.
