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Wastewater Collections 3 Study Guide 2026–2027 | Questions & Answers | A+ Grade

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This study guide provides practice questions and answers for Wastewater Collections 3 for 2026–2027. It covers advanced topics in wastewater collection systems, including system design, operations, maintenance, troubleshooting, safety procedures, and regulatory compliance. Designed for wastewater operators seeking to advance their skills, this guide helps reinforce technical knowledge, improve problem-solving abilities, and prepare effectively for exams or certification assessments to achieve top scores.

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Wastewater Collections 3 Study Guide
questions and answers 2026\2027 A+
Grade

What is SDR # on pipes
- correct answer wall thickness ratio of diameter of pipe to wall thickness



What chemical do you use to reduce H2S?
- correct answer Sodium chlorite (NaClO2),

chlorine, Sodium chlorite selectively oxidizes sulfide and related organic

odors. (oxidation)



What are iron salts used for?
- correct answer Depending on the wastewater plant unit process

configuration, iron salts may also provide improvements in clarification,

phosphate removal, struvite control, solids dewatering and anaerobic

digester performance.



How to install pipe under highway?
- correct answer small excavation on the sides of the

road and boring underneath the road



Pipes most susceptible to H2S
- correct answer concrete, steel, cast iron



what is a Lantern ring
- correct answer A lantern ring is a perforated hollow ring located near the

center of the stuffing box of a pump. They help protect the stuffing box

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