Class C Water Operator License Exam
With 100% Correct Answers 2022\2023
Ammonia mixed with chlorine gas creates a - ANSWER-white smoke
The most difficult part of a water distribution operator's job. - ANSWER-furnish a
continuous supply
Physical connection between a safe and potentially unsafe water source. - ANSWER-
cross connection
A distribution system is a - ANSWER-looped system
Dead end mains should be flushed - ANSWER-every month
Excess nitrate causes a condition called - ANSWER-blue baby syndrome
Water hardness is caused by - ANSWER-calcium and magnesium
Sewer mains should be __ft away from water mains. - ANSWER-9
Water with a pH less than 7 is considered to be - ANSWER-acidic
Bacti records are kept for ____yrs and chemical records are kept for ___yrs. -
ANSWER-5, 10
Bacti samples have to be returned to the lab within ___hrs of the collection time. -
ANSWER-30
Color in the water supply should be less than _____ units. - ANSWER-15
Chlorine is ______ times heavier than air. - ANSWER-2.5
90% of underground pipe failures are related to improper - ANSWER-backfill and
bedding
The spoil bank should be located at least ___ft away from the ditch. - ANSWER-2
The following minimum residuals is ______mg/L for free chlorine and ____mg/L for total
chlorine. - ANSWER-.2, .5
Public opinion of the water utility is _______ at a standstill. - ANSWER-never
A bacti sample should be taken every ____ft of pipe. - ANSWER-1000
, The most common collection point for a bacti sample is the water tap _______. -
ANSWER-outside the house
A standpipe is considered ground storage unless it exceeds _____ft above the highest
________. - ANSWER-80, service connection
________ protection is the electrochemical method for preventing ________ of metal
tanks. - ANSWER-cathodic, corrosion
The _____ is the only cross connection control method approved by _______. -
ANSWER-air gap, tceq
_______ on a pipeline depend on the _____ or coefficient of pipe roughness. -
ANSWER-friction loss, c factor
__________ occurs whenever there is a ______ in the velocity or direction of water
flow. - ANSWER-water hammer, sudden change
The ______ water pressure required by the rules and regulations is ____psi under any
and all conditions. - ANSWER-minimum, 20
100, 150, 200 and 250 are approved classes of _____ _____. - ANSWER-working
pressure
______ is used to anchor pipe bends. - ANSWER-concrete
A general deposit of mineral particles evenly along the inside of the pipe is ________. -
ANSWER-tuberculation
Shoring should be used if a ditch is ___ft or deeper. - ANSWER-5
A written sample writing plan is required for _______ monitoring. - ANSWER-coliform
Ladders should be placed every ___ft in a ditch. - ANSWER-25
An oxygen deficient atmosphere is defined as one which contains _____ than ______
% oxygen. - ANSWER-less, 19.5
Characteristics of a Centrifugal Pump:
as the head _____ the discharge ________. - ANSWER-increases, decreases
The operator should leave a ________ of slack in flexible tubing. - ANSWER-
gooseneck
With 100% Correct Answers 2022\2023
Ammonia mixed with chlorine gas creates a - ANSWER-white smoke
The most difficult part of a water distribution operator's job. - ANSWER-furnish a
continuous supply
Physical connection between a safe and potentially unsafe water source. - ANSWER-
cross connection
A distribution system is a - ANSWER-looped system
Dead end mains should be flushed - ANSWER-every month
Excess nitrate causes a condition called - ANSWER-blue baby syndrome
Water hardness is caused by - ANSWER-calcium and magnesium
Sewer mains should be __ft away from water mains. - ANSWER-9
Water with a pH less than 7 is considered to be - ANSWER-acidic
Bacti records are kept for ____yrs and chemical records are kept for ___yrs. -
ANSWER-5, 10
Bacti samples have to be returned to the lab within ___hrs of the collection time. -
ANSWER-30
Color in the water supply should be less than _____ units. - ANSWER-15
Chlorine is ______ times heavier than air. - ANSWER-2.5
90% of underground pipe failures are related to improper - ANSWER-backfill and
bedding
The spoil bank should be located at least ___ft away from the ditch. - ANSWER-2
The following minimum residuals is ______mg/L for free chlorine and ____mg/L for total
chlorine. - ANSWER-.2, .5
Public opinion of the water utility is _______ at a standstill. - ANSWER-never
A bacti sample should be taken every ____ft of pipe. - ANSWER-1000
, The most common collection point for a bacti sample is the water tap _______. -
ANSWER-outside the house
A standpipe is considered ground storage unless it exceeds _____ft above the highest
________. - ANSWER-80, service connection
________ protection is the electrochemical method for preventing ________ of metal
tanks. - ANSWER-cathodic, corrosion
The _____ is the only cross connection control method approved by _______. -
ANSWER-air gap, tceq
_______ on a pipeline depend on the _____ or coefficient of pipe roughness. -
ANSWER-friction loss, c factor
__________ occurs whenever there is a ______ in the velocity or direction of water
flow. - ANSWER-water hammer, sudden change
The ______ water pressure required by the rules and regulations is ____psi under any
and all conditions. - ANSWER-minimum, 20
100, 150, 200 and 250 are approved classes of _____ _____. - ANSWER-working
pressure
______ is used to anchor pipe bends. - ANSWER-concrete
A general deposit of mineral particles evenly along the inside of the pipe is ________. -
ANSWER-tuberculation
Shoring should be used if a ditch is ___ft or deeper. - ANSWER-5
A written sample writing plan is required for _______ monitoring. - ANSWER-coliform
Ladders should be placed every ___ft in a ditch. - ANSWER-25
An oxygen deficient atmosphere is defined as one which contains _____ than ______
% oxygen. - ANSWER-less, 19.5
Characteristics of a Centrifugal Pump:
as the head _____ the discharge ________. - ANSWER-increases, decreases
The operator should leave a ________ of slack in flexible tubing. - ANSWER-
gooseneck
