WASTEWATER COLLECTIONS LEVEL II &
GRADE 2 PRACTICE EXAM 2026 FULL
QUESTIONS AND DETAILED SOLUTIONS
●● Below what maximum percentage is an atmosphere considered
oxygen deficient? Answer: 19.5%
●● Which type of pipe is recommended when crossing another
underground utility? Answer: Ductile Iron pipe
●● Which chemical may be used to remove sulfides by precipitation?
Answer: Ferric Chloride (FeCl3)
●● What is a Hydro-brake? Answer: A vortex flow regulator
●● What is the purpose of LAMPING a new collection system? Answer:
Test for obstructions and straightness
●● How can most failures of a lift station be prevented? Answer: Proper
preventative maintenance
●● What info does a station book provide? Answer: ID Numbers and
maps of stations
, ●● Which pieces of equipment would be expected in a DRY WELL?
Answer: 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? Answer: Swing check valve
●● Which piece of equipment is used to aid he testing for insulation
resistance in a submersible pump motor? Answer: Megger
●● What are the major reasons for a motor failure? Answer:
Overloading, voltage imbalance, short cycling
●● What is OLFACTORY FATIGUE? Answer: Loss of smell
●● What instrument do you use to measure the pressure head in a pipe,
tank, or soil? Answer: Piezometer
●● What items should be listed on a Service Line Location Card?
Answer: Location of a tap. Pipe size. Type of pipe. Cleanout location.
GRADE 2 PRACTICE EXAM 2026 FULL
QUESTIONS AND DETAILED SOLUTIONS
●● Below what maximum percentage is an atmosphere considered
oxygen deficient? Answer: 19.5%
●● Which type of pipe is recommended when crossing another
underground utility? Answer: Ductile Iron pipe
●● Which chemical may be used to remove sulfides by precipitation?
Answer: Ferric Chloride (FeCl3)
●● What is a Hydro-brake? Answer: A vortex flow regulator
●● What is the purpose of LAMPING a new collection system? Answer:
Test for obstructions and straightness
●● How can most failures of a lift station be prevented? Answer: Proper
preventative maintenance
●● What info does a station book provide? Answer: ID Numbers and
maps of stations
, ●● Which pieces of equipment would be expected in a DRY WELL?
Answer: 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? Answer: Swing check valve
●● Which piece of equipment is used to aid he testing for insulation
resistance in a submersible pump motor? Answer: Megger
●● What are the major reasons for a motor failure? Answer:
Overloading, voltage imbalance, short cycling
●● What is OLFACTORY FATIGUE? Answer: Loss of smell
●● What instrument do you use to measure the pressure head in a pipe,
tank, or soil? Answer: Piezometer
●● What items should be listed on a Service Line Location Card?
Answer: Location of a tap. Pipe size. Type of pipe. Cleanout location.
