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
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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
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