Wastewater Collections Questions with Correct Answers

What is another term for wastewater collections system? Correct Answer Sewerage System What is the term used to describe the seepage of ground water into a sewer system including service connections? Correct Answer Infiltration What is SSO stand for? Correct Answer Sanitary sewer overflow What is the minimum scouring velocity in a sewer system? Correct Answer 2 feet per second no more than 10 feet per second Smoke testing of wastewater collections system is used to determine what? Correct Answer The location of illegal connections to a collection system High velocity cleaners, kites, bags, poly pigs and sewer scooters are what type of cleaning method? Correct Answer Hydraulic cleaning What is the most widely used chemical to treat hydrogen sulfide? Correct Answer Chlorine How many colors of markings are there for OUPS utility markings? Correct Answer 8 What is installed in to give access to a portion of the service line leading to the main lines? Correct Answer A Wye Sewer pipes are usually tested at what air pressure above any outside water pressure on the pipe? Correct Answer 3 to 5 psi What should be used to test for deflection and offset joints when repairing or installing new sewer lines? Correct Answer A Mandrel What occurs in pumps when the absolute pressure at the pump inlet drops below the vapor pressure of the water being pumped? Correct Answer Cavitation What is the heart of a centrifugal pump? Correct Answer Impeller What is used to provide a seal where the shaft passes through the pump casing in order to keep air from being drawn or sucked into the pump or the water pump from coming out? Correct Answer Packing What is a pump fitted with that must never run dry or the faces will be burned and ruined? Correct Answer Mechanical seals What is the property of a fluid that resists efforts to change its shape or flow? Correct Answer Viscosity