Class C Water Operator License Exam: Questions & Answers: Latest Updated A+ Guide

Ammonia mixed with chlorine gas creates a - answhite smoke The most difficult part of a water distribution operator's job. - ansfurnish a continuous supply Physical connection between a safe and potentially unsafe water source. - anscross connection A distribution system is a - anslooped system Dead end mains should be flushed - ansevery month Excess nitrate causes a condition called - ansblue baby syndrome Water hardness is caused by - anscalcium and magnesium Sewer mains should be __ft away from water mains. - ans9 Water with a pH less than 7 is considered to be - ansacidic Bacti records are kept for ____yrs and chemical records are kept for ___yrs. - ans5, 10 Bacti samples have to be returned to the lab within ___hrs of the collection time. - ans30 Color in the water supply should be less than _____ units. - ans15 Chlorine is ______ times heavier than air. - ans2.5