Wastewater collections GRADE 1 Quizzes & 100%
Correct Answers
When should atmospheric monitoring in a confined space be performed?
Continuously from pre-entry to exit
Below what maximum percentage is an atmosphere considered oxygen deficient?
19.5%
Which type of pipe is recommended when crossing another underground utility?
Ductile Iron pipe
Which chemical may be used to remove sulfides by precipitation?
Ferric Chloride (FeCl3)
What is a Hydro-brake?
A vortex flow regulator
What is the purpose of LAMPING a new collection system?
Test for obstructions and straightness
How can most failures of a lift station be prevented?
Proper preventative maintenance
What info does a station book provide?
ID Numbers and maps of stations
Which pieces of equipment would be expected in a DRY WELL?
, Electric controls, motors, pumps (NOT FLOATS)
What piece of equipment is used to prevent the discharged wastewater from flowing back
into the wet well when the pump shuts off?
Swing check valve
Which piece of equipment is used to aid he testing for insulation resistance in a submersible
pump motor?
Megger
What are the major reasons for a motor failure?
Overloading, voltage imbalance, short cycling
What is OLFACTORY FATIGUE?
Loss of smell
What instrument do you use to measure the pressure head in a pipe, tank, or soil?
Piezometer
What items should be listed on a Service Line Location Card?
Location of a tap. Pipe size. Type of pipe. Cleanout location.
What are indicators of a blockage in a sewer system?
Overflowing manholes. septic wastewater. Flooded basements and buildings.
What does SCOURING VELOCITY refer to?
the flow required to prevent the deposition and buildup of solids
Correct Answers
When should atmospheric monitoring in a confined space be performed?
Continuously from pre-entry to exit
Below what maximum percentage is an atmosphere considered oxygen deficient?
19.5%
Which type of pipe is recommended when crossing another underground utility?
Ductile Iron pipe
Which chemical may be used to remove sulfides by precipitation?
Ferric Chloride (FeCl3)
What is a Hydro-brake?
A vortex flow regulator
What is the purpose of LAMPING a new collection system?
Test for obstructions and straightness
How can most failures of a lift station be prevented?
Proper preventative maintenance
What info does a station book provide?
ID Numbers and maps of stations
Which pieces of equipment would be expected in a DRY WELL?
, Electric controls, motors, pumps (NOT FLOATS)
What piece of equipment is used to prevent the discharged wastewater from flowing back
into the wet well when the pump shuts off?
Swing check valve
Which piece of equipment is used to aid he testing for insulation resistance in a submersible
pump motor?
Megger
What are the major reasons for a motor failure?
Overloading, voltage imbalance, short cycling
What is OLFACTORY FATIGUE?
Loss of smell
What instrument do you use to measure the pressure head in a pipe, tank, or soil?
Piezometer
What items should be listed on a Service Line Location Card?
Location of a tap. Pipe size. Type of pipe. Cleanout location.
What are indicators of a blockage in a sewer system?
Overflowing manholes. septic wastewater. Flooded basements and buildings.
What does SCOURING VELOCITY refer to?
the flow required to prevent the deposition and buildup of solids
