CLASS C WATER OPERATOR LICENSE EXAM
QUESTIONS AND ANSWERS
Ammonia mixed with chlorine gas creates a -ANSwhite smoke
The most difficult part of a water distribution operator's job. -ANSfurnish a continuous
supply
Physical connection between a safe and potentially unsafe water source. -ANScross
connection
A distribution system is a -ANSlooped system
Dead end mains should be flushed -ANSevery month
Excess nitrate causes a condition called -ANSblue baby syndrome
Water hardness is caused by -ANScalcium and magnesium
Sewer mains should be __ft away from water mains. -ANS9
Water with a pH less than 7 is considered to be -ANSacidic
Bacti records are kept for ____yrs and chemical records are kept for ___yrs. -ANS5, 10
Bacti samples have to be returned to the lab within ___hrs of the collection time. -
ANS30
Color in the water supply should be less than _____ units. -ANS15
Chlorine is ______ times heavier than air. -ANS2.5
90% of underground pipe failures are related to improper -ANSbackfill and bedding
The spoil bank should be located at least ___ft away from the ditch. -ANS2
The following minimum residuals is ______mg/L for free chlorine and ____mg/L for total
chlorine. -ANS.2, .5
Public opinion of the water utility is _______ at a standstill. -ANSnever
A bacti sample should be taken every ____ft of pipe. -ANS1000
, The most common collection point for a bacti sample is the water tap _______. -
ANSoutside the house
A standpipe is considered ground storage unless it exceeds _____ft above the highest
________. -ANS80, service connection
________ protection is the electrochemical method for preventing ________ of metal
tanks. -ANScathodic, corrosion
The _____ is the only cross connection control method approved by _______. -ANSair
gap, tceq
_______ on a pipeline depend on the _____ or coefficient of pipe roughness. -
ANSfriction loss, c factor
__________ occurs whenever there is a ______ in the velocity or direction of water
flow. -ANSwater hammer, sudden change
The ______ water pressure required by the rules and regulations is ____psi under any
and all conditions. -ANSminimum, 20
100, 150, 200 and 250 are approved classes of _____ _____. -ANSworking pressure
______ is used to anchor pipe bends. -ANSconcrete
A general deposit of mineral particles evenly along the inside of the pipe is ________. -
ANStuberculation
Shoring should be used if a ditch is ___ft or deeper. -ANS5
A written sample writing plan is required for _______ monitoring. -ANScoliform
Ladders should be placed every ___ft in a ditch. -ANS25
An oxygen deficient atmosphere is defined as one which contains _____ than ______
% oxygen. -ANSless, 19.5
Characteristics of a Centrifugal Pump:
as the head _____ the discharge ________. -ANSincreases, decreases
The operator should leave a ________ of slack in flexible tubing. -ANSgooseneck
The most common type of water meter is the ____ ____ meter. -ANSpositive
displacement
QUESTIONS AND ANSWERS
Ammonia mixed with chlorine gas creates a -ANSwhite smoke
The most difficult part of a water distribution operator's job. -ANSfurnish a continuous
supply
Physical connection between a safe and potentially unsafe water source. -ANScross
connection
A distribution system is a -ANSlooped system
Dead end mains should be flushed -ANSevery month
Excess nitrate causes a condition called -ANSblue baby syndrome
Water hardness is caused by -ANScalcium and magnesium
Sewer mains should be __ft away from water mains. -ANS9
Water with a pH less than 7 is considered to be -ANSacidic
Bacti records are kept for ____yrs and chemical records are kept for ___yrs. -ANS5, 10
Bacti samples have to be returned to the lab within ___hrs of the collection time. -
ANS30
Color in the water supply should be less than _____ units. -ANS15
Chlorine is ______ times heavier than air. -ANS2.5
90% of underground pipe failures are related to improper -ANSbackfill and bedding
The spoil bank should be located at least ___ft away from the ditch. -ANS2
The following minimum residuals is ______mg/L for free chlorine and ____mg/L for total
chlorine. -ANS.2, .5
Public opinion of the water utility is _______ at a standstill. -ANSnever
A bacti sample should be taken every ____ft of pipe. -ANS1000
, The most common collection point for a bacti sample is the water tap _______. -
ANSoutside the house
A standpipe is considered ground storage unless it exceeds _____ft above the highest
________. -ANS80, service connection
________ protection is the electrochemical method for preventing ________ of metal
tanks. -ANScathodic, corrosion
The _____ is the only cross connection control method approved by _______. -ANSair
gap, tceq
_______ on a pipeline depend on the _____ or coefficient of pipe roughness. -
ANSfriction loss, c factor
__________ occurs whenever there is a ______ in the velocity or direction of water
flow. -ANSwater hammer, sudden change
The ______ water pressure required by the rules and regulations is ____psi under any
and all conditions. -ANSminimum, 20
100, 150, 200 and 250 are approved classes of _____ _____. -ANSworking pressure
______ is used to anchor pipe bends. -ANSconcrete
A general deposit of mineral particles evenly along the inside of the pipe is ________. -
ANStuberculation
Shoring should be used if a ditch is ___ft or deeper. -ANS5
A written sample writing plan is required for _______ monitoring. -ANScoliform
Ladders should be placed every ___ft in a ditch. -ANS25
An oxygen deficient atmosphere is defined as one which contains _____ than ______
% oxygen. -ANSless, 19.5
Characteristics of a Centrifugal Pump:
as the head _____ the discharge ________. -ANSincreases, decreases
The operator should leave a ________ of slack in flexible tubing. -ANSgooseneck
The most common type of water meter is the ____ ____ meter. -ANSpositive
displacement
