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Author Question: Crown corrosion in sanitary sewers is caused by a. bacteria that produce hydrogen sulfide gas and ... (Read 61 times)

wenmo

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on: Jul 26, 2018
Crown corrosion in sanitary sewers is caused by
 
  a. bacteria that produce hydrogen sulfide gas and sulfuric acid
  b. abrasion of the pipe wall by suspended solids in the sewage
  c. normal wear and tear of the pipeline
  d. excessively high wastewater flow velocities
  e. acidic industrial wastewater

Question 2

Exfiltration testing is used to
 
  a. ensure noxious gases do not leak OUT of a sewer line
  b. determine the pumping capacity of water supply wells
  c. check the structural integrity of underground pipelines
  d. test sanitary sewers for watertightness or leaks
  e. determine the fire flow capacity of a water main


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lou

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Reply #1 on: Jul 26, 2018
Answer to Question 1

a

Answer to Question 2

d


wenmo

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Reply 2 on: Jul 26, 2018
:D TYSM

duy1981999

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Reply 3 on: Yesterday
Thanks for the timely response, appreciate it

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