Class C Water Operator License Exam
Ammonia mixed with chlorine gas creates a
(Ans- white smoke
The most difficult part of a water distribution operator's job.
(Ans- furnish a continuous supply
Physical connection between a safe and potentially unsafe water source.
(Ans- cross connection
A distribution system is a
(Ans- looped system
Dead end mains should be flushed
(Ans- every month
Excess nitrate causes a condition called
(Ans- blue baby syndrome
Water hardness is caused by
(Ans- calcium and magnesium
Sewer mains should be __ft away from water mains.
(Ans- 9
Water with a pH less than 7 is considered to be
(Ans- acidic
Bacti records are kept for ____yrs and chemical records are kept for
___yrs.
(Ans- 5, 10
, Bacti samples have to be returned to the lab within ___hrs of the collection
time.
(Ans- 30
Color in the water supply should be less than _____ units.
(Ans- 15
Chlorine is ______ times heavier than air.
(Ans- 2.5
90% of underground pipe failures are related to improper
(Ans- backfill and bedding
The spoil bank should be located at least ___ft away from the ditch.
(Ans- 2
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.
(Ans- never
A bacti sample should be taken every ____ft of pipe.
(Ans- 1000
The most common collection point for a bacti sample is the water tap
_______. (Ans- outside the house
A standpipe is considered ground storage unless it exceeds _____ft above
the highest ________.
(Ans- 80, service connection
Ammonia mixed with chlorine gas creates a
(Ans- white smoke
The most difficult part of a water distribution operator's job.
(Ans- furnish a continuous supply
Physical connection between a safe and potentially unsafe water source.
(Ans- cross connection
A distribution system is a
(Ans- looped system
Dead end mains should be flushed
(Ans- every month
Excess nitrate causes a condition called
(Ans- blue baby syndrome
Water hardness is caused by
(Ans- calcium and magnesium
Sewer mains should be __ft away from water mains.
(Ans- 9
Water with a pH less than 7 is considered to be
(Ans- acidic
Bacti records are kept for ____yrs and chemical records are kept for
___yrs.
(Ans- 5, 10
, Bacti samples have to be returned to the lab within ___hrs of the collection
time.
(Ans- 30
Color in the water supply should be less than _____ units.
(Ans- 15
Chlorine is ______ times heavier than air.
(Ans- 2.5
90% of underground pipe failures are related to improper
(Ans- backfill and bedding
The spoil bank should be located at least ___ft away from the ditch.
(Ans- 2
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.
(Ans- never
A bacti sample should be taken every ____ft of pipe.
(Ans- 1000
The most common collection point for a bacti sample is the water tap
_______. (Ans- outside the house
A standpipe is considered ground storage unless it exceeds _____ft above
the highest ________.
(Ans- 80, service connection
