Class C Water Operator License Exam Questions And Answers Already Graded A+

Ammonia mixed with chlorine gas creates a - Answer-white smoke The most difficult part of a water distribution operator's job. - Answer-furnish a continuous supply Physical connection between a safe and potentially unsafe water source. - Answer-cross connection A distribution system is a - Answer-looped system Dead end mains should be flushed - Answer-every month Excess nitrate causes a condition called - Answer-blue baby syndrome Water hardness is caused by - Answer-calcium and magnesium Sewer mains should be __ft away from water mains. - Answer-9 Water with a pH less than 7 is considered to be - Answer-acidic Bacti records are kept for ____yrs and chemical records are kept for ___yrs. - Answer-5, 10 Bacti samples have to be returned to the lab within ___hrs of the collection time. - Answer-30 Color in the water supply should be less than _____ units. - Answer-15 Chlorine is ______ times heavier than air. - Answer-2.5 90% of underground pipe failures are related to improper - Answer-backfill and bedding The spoil bank should be located at least ___ft away from the ditch. - Answer-2The following minimum residuals is ______mg/L for free chlorine and ____mg/L for total chlorine. - Answer-.2, .5 Public opinion of the water utility is _______ at a standstill. - Answer-never