Class C Water Operator License Exam
questions and answers passed
white smoke - correct answer ✔✔Ammonia mixed with chlorine gas creates a
furnish a continuous supply - correct answer ✔✔The most difficult part of a water distribution
operator's job.
cross connection - correct answer ✔✔Physical connection between a safe and potentially
unsafe water source.
looped system - correct answer ✔✔A distribution system is a
every month - correct answer ✔✔Dead end mains should be flushed
blue baby syndrome - correct answer ✔✔Excess nitrate causes a condition called
calcium and magnesium - correct answer ✔✔Water hardness is caused by
9 - correct answer ✔✔Sewer mains should be __ft away from water mains.
acidic - correct answer ✔✔Water with a pH less than 7 is considered to be
5, 10 - correct answer ✔✔Bacti records are kept for ____yrs and chemical records are kept for
___yrs.
, 30 - correct answer ✔✔Bacti samples have to be returned to the lab within ___hrs of the
collection time.
15 - correct answer ✔✔Color in the water supply should be less than _____ units.
2 - correct answer ✔✔Chlorine is ______ times heavier than air.
backfill and bedding - correct answer ✔✔90% of underground pipe failures are related to
improper
2 - correct answer ✔✔The spoil bank should be located at least ___ft away from the ditch.
.2, .5 - correct answer ✔✔The following minimum residuals is ______mg/L for free chlorine and
____mg/L for total chlorine.
never - correct answer ✔✔Public opinion of the water utility is _______ at a standstill.
1000 - correct answer ✔✔A bacti sample should be taken every ____ft of pipe.
outside the house - correct answer ✔✔The most common collection point for a bacti sample is
the water tap _______.
80, service connection - correct answer ✔✔A standpipe is considered ground storage unless it
exceeds _____ft above the highest ________.
cathodic, corrosion - correct answer ✔✔________ protection is the electrochemical method for
preventing ________ of metal tanks.
questions and answers passed
white smoke - correct answer ✔✔Ammonia mixed with chlorine gas creates a
furnish a continuous supply - correct answer ✔✔The most difficult part of a water distribution
operator's job.
cross connection - correct answer ✔✔Physical connection between a safe and potentially
unsafe water source.
looped system - correct answer ✔✔A distribution system is a
every month - correct answer ✔✔Dead end mains should be flushed
blue baby syndrome - correct answer ✔✔Excess nitrate causes a condition called
calcium and magnesium - correct answer ✔✔Water hardness is caused by
9 - correct answer ✔✔Sewer mains should be __ft away from water mains.
acidic - correct answer ✔✔Water with a pH less than 7 is considered to be
5, 10 - correct answer ✔✔Bacti records are kept for ____yrs and chemical records are kept for
___yrs.
, 30 - correct answer ✔✔Bacti samples have to be returned to the lab within ___hrs of the
collection time.
15 - correct answer ✔✔Color in the water supply should be less than _____ units.
2 - correct answer ✔✔Chlorine is ______ times heavier than air.
backfill and bedding - correct answer ✔✔90% of underground pipe failures are related to
improper
2 - correct answer ✔✔The spoil bank should be located at least ___ft away from the ditch.
.2, .5 - correct answer ✔✔The following minimum residuals is ______mg/L for free chlorine and
____mg/L for total chlorine.
never - correct answer ✔✔Public opinion of the water utility is _______ at a standstill.
1000 - correct answer ✔✔A bacti sample should be taken every ____ft of pipe.
outside the house - correct answer ✔✔The most common collection point for a bacti sample is
the water tap _______.
80, service connection - correct answer ✔✔A standpipe is considered ground storage unless it
exceeds _____ft above the highest ________.
cathodic, corrosion - correct answer ✔✔________ protection is the electrochemical method for
preventing ________ of metal tanks.
