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(Wastewater) Collection System Questions with Correct Answers 2026

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(Wastewater) Collection System Questions with Correct Answers 2026

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(Wastewater) Collection System Questions
with Correct Answers 2026
Name the four types of lines in a community wastewater system. - CORRECT ANSWER --
Lateral lines

- Sub-main "branches"

- Main Line

- Trunk



Minimum velocity of wastewater in collection system? - CORRECT ANSWER -2ſt per second



Maximum velocity? - CORRECT ANSWER -10ſt per second



Wherec shouldc manholesc bec installed?c -c CORRECTc ANSWERc --c Endc ofc eachc line

- Changesc inc grade,c size,c orc alignment



Wastewaterc linesc needc toc bec howc farc fromc lateralc waterc lines?c -c CORRECTc ANSWERc -10c feet



Wastewaterc linesc needc toc bec howc farc fromc proposedc petroleumc storagec tanksc orc waterc well
s?c -c CORRECTc ANSWERc -50c feet



Waterc thatc flowsc intoc ac wastewaterc collectionc system.c -c CORRECTc ANSWERc -Inflow



Groundc waterc thatc hasc enteredc ac wastewaterc collectionc systemc throughc defectivec pipes,c pip
ec joints,c connectionsc orc manholec walls.c -c CORRECTc ANSWERc -Infiltration



Wastewaterc thatc isc similarlyc leakingc outc ofc ac collectionc systemc andc intoc thec environment.c -
CORRECTc ANSWERc -Exfiltration

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