Class C Water Operator License Exam
Questions & Answers
Ammonia mixed with chlorine gas creates a - ANSWERSwhite smoke
AnswerThe most difficult part of a water distribution operator's job. - ANSWERSfurnish
a continuous supply
AnswerPhysical connection between a safe and potentially unsafe water source. -
ANSWERScross connection
AnswerA distribution system is a - ANSWERSlooped system
AnswerDead end mains should be flushed - ANSWERSevery month
AnswerExcess nitrate causes a condition called - ANSWERSblue baby syndrome
AnswerWater hardness is caused by - ANSWERScalcium and magnesium
AnswerSewer mains should be __ft away from water mains. - ANSWERS9
AnswerWater with a pH less than 7 is considered to be - ANSWERSacidic
AnswerBacti records are kept for ____yrs and chemical records are kept for ___yrs. -
ANSWERS5, 10
AnswerBacti samples have to be returned to the lab within ___hrs of the collection time.
- ANSWERS30
AnswerColor in the water supply should be less than _____ units. - ANSWERS15
AnswerChlorine is ______ times heavier than air. - ANSWERS2.5
Answer90% of underground pipe failures are related to improper - ANSWERSbackfill
and bedding
, AnswerThe spoil bank should be located at least ___ft away from the ditch. -
ANSWERS2
AnswerThe following minimum residuals is ______mg/L for free chlorine and ____mg/L
for total chlorine. - ANSWERS.2, .5
AnswerPublic opinion of the water utility is _______ at a standstill. - ANSWERSnever
AnswerA bacti sample should be taken every ____ft of pipe. - ANSWERS1000
AnswerThe most common collection point for a bacti sample is the water tap _______. -
ANSWERSoutside the house
AnswerA standpipe is considered ground storage unless it exceeds _____ft above the
highest ________. - ANSWERS80, service connection
Answer________ protection is the electrochemical method for preventing ________ of
metal tanks. - ANSWERScathodic, corrosion
AnswerThe _____ is the only cross connection control method approved by _______. -
ANSWERSair gap, tceq
Answer_______ on a pipeline depend on the _____ or coefficient of pipe roughness. -
ANSWERSfriction loss, c factor
Answer__________ occurs whenever there is a ______ in the velocity or direction of
water flow. - ANSWERSwater hammer, sudden change
AnswerThe ______ water pressure required by the rules and regulations is ____psi
under any and all conditions. - ANSWERSminimum, 20
Answer100, 150, 200 and 250 are approved classes of _____ _____. -
ANSWERSworking pressure
Answer______ is used to anchor pipe bends. - ANSWERSconcrete
AnswerA general deposit of mineral particles evenly along the inside of the pipe is
________. - ANSWERStuberculation
AnswerShoring should be used if a ditch is ___ft or deeper. - ANSWERS5
AnswerA written sample writing plan is required for _______ monitoring. -
ANSWERScoliform
AnswerLadders should be placed every ___ft in a ditch. - ANSWERS25
Questions & Answers
Ammonia mixed with chlorine gas creates a - ANSWERSwhite smoke
AnswerThe most difficult part of a water distribution operator's job. - ANSWERSfurnish
a continuous supply
AnswerPhysical connection between a safe and potentially unsafe water source. -
ANSWERScross connection
AnswerA distribution system is a - ANSWERSlooped system
AnswerDead end mains should be flushed - ANSWERSevery month
AnswerExcess nitrate causes a condition called - ANSWERSblue baby syndrome
AnswerWater hardness is caused by - ANSWERScalcium and magnesium
AnswerSewer mains should be __ft away from water mains. - ANSWERS9
AnswerWater with a pH less than 7 is considered to be - ANSWERSacidic
AnswerBacti records are kept for ____yrs and chemical records are kept for ___yrs. -
ANSWERS5, 10
AnswerBacti samples have to be returned to the lab within ___hrs of the collection time.
- ANSWERS30
AnswerColor in the water supply should be less than _____ units. - ANSWERS15
AnswerChlorine is ______ times heavier than air. - ANSWERS2.5
Answer90% of underground pipe failures are related to improper - ANSWERSbackfill
and bedding
, AnswerThe spoil bank should be located at least ___ft away from the ditch. -
ANSWERS2
AnswerThe following minimum residuals is ______mg/L for free chlorine and ____mg/L
for total chlorine. - ANSWERS.2, .5
AnswerPublic opinion of the water utility is _______ at a standstill. - ANSWERSnever
AnswerA bacti sample should be taken every ____ft of pipe. - ANSWERS1000
AnswerThe most common collection point for a bacti sample is the water tap _______. -
ANSWERSoutside the house
AnswerA standpipe is considered ground storage unless it exceeds _____ft above the
highest ________. - ANSWERS80, service connection
Answer________ protection is the electrochemical method for preventing ________ of
metal tanks. - ANSWERScathodic, corrosion
AnswerThe _____ is the only cross connection control method approved by _______. -
ANSWERSair gap, tceq
Answer_______ on a pipeline depend on the _____ or coefficient of pipe roughness. -
ANSWERSfriction loss, c factor
Answer__________ occurs whenever there is a ______ in the velocity or direction of
water flow. - ANSWERSwater hammer, sudden change
AnswerThe ______ water pressure required by the rules and regulations is ____psi
under any and all conditions. - ANSWERSminimum, 20
Answer100, 150, 200 and 250 are approved classes of _____ _____. -
ANSWERSworking pressure
Answer______ is used to anchor pipe bends. - ANSWERSconcrete
AnswerA general deposit of mineral particles evenly along the inside of the pipe is
________. - ANSWERStuberculation
AnswerShoring should be used if a ditch is ___ft or deeper. - ANSWERS5
AnswerA written sample writing plan is required for _______ monitoring. -
ANSWERScoliform
AnswerLadders should be placed every ___ft in a ditch. - ANSWERS25
