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Class C Water Operator License Exam Complete Study Guide

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Class C Water Operator License Exam Complete Study Guide 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. -...

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  • November 10, 2024
  • 9
  • 2024/2025
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Class C Water Operator License Exam

Complete Study Guide


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


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The spoil bank should be located at least ___ft away from the ditch. - ANSWER✔✔-2


The 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


A bacti sample should be taken every ____ft of pipe. - ANSWER✔✔-1000


The most common collection point for a bacti sample is the water tap _______. - ANSWER✔✔-outside

the house


A standpipe is considered ground storage unless it exceeds _____ft above the highest ________. -

ANSWER✔✔-80, service connection


________ protection is the electrochemical method for preventing ________ of metal tanks. -

ANSWER✔✔-cathodic, corrosion


The _____ is the only cross connection control method approved by _______. - ANSWER✔✔-air gap,

tceq


_______ on a pipeline depend on the _____ or coefficient of pipe roughness. - ANSWER✔✔-friction loss,

c factor


__________ occurs whenever there is a ______ in the velocity or direction of water flow. - ANSWER✔✔-

water hammer, sudden change


The ______ water pressure required by the rules and regulations is ____psi under any and all conditions.

- ANSWER✔✔-minimum, 20


100, 150, 200 and 250 are approved classes of _____ _____. - ANSWER✔✔-working pressure

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