WASTEWATER COLLECTIONS III
CERTIFICATION TEST PAPER 2026 COMPLETE
SOLUTIONS GRADED A PLUS
◉ frequest starts and stops on a large electric motor will most likely
cause.
Answer: the motor windings to heat up
◉ during a routine visit to a lift station, the operator finds that while
pump a is running, there is a recirculation of liquid through pump b.
the most likely problem is that the check valve on pump b is.
Answer: stuck open
◉ which of the following is most likely to cause pipe friction losses
to increse.
Answer: increasign the velocity
◉ the mandrel test should be conducted to test new sewer lines that
are constructed of which material.
Answer: polyvinyl chloride pipe
◉ hydrogen peroxide solution eliminates/removes sulfides from
wastewater by.
,Answer: oxidation
◉ a rehabilitation program must begin with.
Answer: a inventory of the system
◉ why is replacing the wastewater collection system in some
downtown streets difficult.
Answer: there is crowding of other underground utilities
◉ sewer rate surcharges for commercial users are usually based on
flow.
Answer: BOD and suspended solids
◉ the lead ump has been running for several hours, and a sucking
noise is coming from the wet well. the wet well is almost empty.
what is the first action to take.
Answer: ensure the manhole will not infiltrate
◉ for aerobic organisms to live and multiply they must have the.
Answer: presence of oxygen
◉ an excavated pipe trench should be only as wied as necessary to
permit the proper installation and backfill of the pipe to ensure.
, Answer: proper loading conditions on the pipe
◉ when making changes to the tractor of a closed circuit tv unit to
acommodate the size of the pipe, its important to keep the camera
lens as close as possible to the.
Answer: centerline of the pipe
◉ the motor is stopping and starting more frequesntly than is
recommended by the manufacturer. what an an operator do to help
the situation.
Answer: adjust the variable frequency drive
◉ a pump curve is used to.
Answer: indicate how the motor and pump will perform
◉ vacuum sewer systems are installed when.
Answer: the topography is such that a gravity system would be
expensive to install
◉ which of the following is part of wastewater collection systems
safety plan.
Answer: lockout/tagout
CERTIFICATION TEST PAPER 2026 COMPLETE
SOLUTIONS GRADED A PLUS
◉ frequest starts and stops on a large electric motor will most likely
cause.
Answer: the motor windings to heat up
◉ during a routine visit to a lift station, the operator finds that while
pump a is running, there is a recirculation of liquid through pump b.
the most likely problem is that the check valve on pump b is.
Answer: stuck open
◉ which of the following is most likely to cause pipe friction losses
to increse.
Answer: increasign the velocity
◉ the mandrel test should be conducted to test new sewer lines that
are constructed of which material.
Answer: polyvinyl chloride pipe
◉ hydrogen peroxide solution eliminates/removes sulfides from
wastewater by.
,Answer: oxidation
◉ a rehabilitation program must begin with.
Answer: a inventory of the system
◉ why is replacing the wastewater collection system in some
downtown streets difficult.
Answer: there is crowding of other underground utilities
◉ sewer rate surcharges for commercial users are usually based on
flow.
Answer: BOD and suspended solids
◉ the lead ump has been running for several hours, and a sucking
noise is coming from the wet well. the wet well is almost empty.
what is the first action to take.
Answer: ensure the manhole will not infiltrate
◉ for aerobic organisms to live and multiply they must have the.
Answer: presence of oxygen
◉ an excavated pipe trench should be only as wied as necessary to
permit the proper installation and backfill of the pipe to ensure.
, Answer: proper loading conditions on the pipe
◉ when making changes to the tractor of a closed circuit tv unit to
acommodate the size of the pipe, its important to keep the camera
lens as close as possible to the.
Answer: centerline of the pipe
◉ the motor is stopping and starting more frequesntly than is
recommended by the manufacturer. what an an operator do to help
the situation.
Answer: adjust the variable frequency drive
◉ a pump curve is used to.
Answer: indicate how the motor and pump will perform
◉ vacuum sewer systems are installed when.
Answer: the topography is such that a gravity system would be
expensive to install
◉ which of the following is part of wastewater collection systems
safety plan.
Answer: lockout/tagout
