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Examen
NC Water Operator B Certification Exam 2023 with 100% correct answers
Presedimentation 
Reduce silt in water 
 
 
 
Settling zone 
Calm area in settling basin where suspended materials settle 
 
 
 
Coagulation 
Occurs in Seconds 
 
 
 
Flocculation 
Occurs in Minutes (optimum velocity 0.5 fps) 
Floc should be popcorn sized 
 
 
 
Sedimentation 
Occurs in Hours (4 hour detention time) 
 
 
 
Typical Coagulants 
Aluminum Sulfate Al2(SO4)3 
Ferrix Fe2(SO4)3 
 
 
 
pH Increasing Chemicals 
Lime (Ca(OH)2), Caustic soda, Soda ash, Bicarbonate 
 
 
 
pH Lowering 
Carbon...
Examen
Nc Water Operator B Certification Exam Questions And Answers. Verified 2026.
PopularNc Water Operator B 
Certification Exam Questions 
And Answers. Verified 2026.