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
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
