Class C Water Operator License Exam Questions And Answers

Class C Water Operator License Exam Questions And Answers 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 ________ protection is the electrochemical method for preventing ________ of metal tanks. - ANS cathodic, corrosion The _____ is the only cross connection control method approved by _______. - ANS air gap, tceq _______ on a pipeline depend on the _____ or coefficient of pipe roughness. - ANS friction loss, c factor