Level 1 Water Distribution Practice Test Questions and Answers 100% Correct
Question : The minimum and maximum chloride residual in a
water distribution system is ?
Correct answer: 0.2 mg/l and 4mg/L of free chlorine
Question : Nitrate may not exceed what concentration when
tested yearly for a groundwater treatment plant ?
Correct answer: 10 mg/L
Question : The minimum number of total coliform samples
that must be collected per month is based on Wich of the
following ?
Correct answer: The population served by the system
Question : When a distribution bacteriological sample is
positive for a total coliform the procedure is ?
Correct answer: Repeat the sample and take a sample 5
connections upstream and downstream to confirm total
coliform
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