Wastewater Collections 3 2026 Question and
Answer | Newest Previously Tested Scripts |
Verified Solutions | A+ Verified
• frequest starts and stops on a large electric motor will most likely cause. CORRECT
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. CORRECT ANSWER: stuck open
• which of the following is most likely to cause pipe friction losses to increse. CORRECT
ANSWER: increasign the velocity
• the mandrel test should be conducted to test new sewer lines that are constructed of
which material. CORRECT ANSWER: polyvinyl chloride pipe
• hydrogen peroxide solution eliminates/removes sulfides from wastewater by.
CORRECT ANSWER: oxidation
• a rehabilitation program must begin with. CORRECT ANSWER: a inventory of the
system
• why is replacing the wastewater collection system in some downtown streets difficult.
CORRECT ANSWER: there is crowding of other underground utilities
• sewer rate surcharges for commercial users are usually based on flow. CORRECT
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. CORRECT
ANSWER: ensure the manhole will not infiltrate
• for aerobic organisms to live and multiply they must have the. CORRECT 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. CORRECT 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.
CORRECT 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. CORRECT ANSWER:
adjust the variable frequency drive
• a pump curve is used to. CORRECT ANSWER: indicate how the motor and pump will
perform
• vacuum sewer systems are installed when. CORRECT 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. CORRECT
ANSWER: lockout/tagout
• what is the first consideration during the design of a sanitary collection system.
CORRECT ANSWER: size of the drainage area
• to help control hydrogen sulfide generation, which of the following types of chemicals
can be added to a wet well. CORRECT ANSWER: iron salts
• to correct a 3-phase electric motor that is running in the wrong direction after it has
been reinstalled an operator should. CORRECT ANSWER: switch any two motor leads
• a discharge line from a lift station constructed of rough pipe and many bends will
experience a higher. CORRECT ANSWER: total dynamic head
• high morale is generally associated with. CORRECT ANSWER: increased productivity
• the best advantage to using variable speed pumps is that they. CORRECT ANSWER:
produce a flow without rapid fluctuation
• why do electric motors draw more power when being started than while being
operated under normal conditions. CORRECT ANSWER: the motor has to start moving
the associated load
• the most effective method of confirming active lateral connections is. CORRECT
ANSWER: dye testing the service line
• the steel coupling half on a steel shaft of a pump motor is press fit. to remove the
coupling half an operator should. CORRECT ANSWER: heat the coupling and cool the
shaft
• the metal strip in an electrical fuse will melt from the heat caused by. CORRECT
ANSWER: excessive current
• a characteristic of an epoxy is that it. CORRECT ANSWER: is resistant to mild acids
Answer | Newest Previously Tested Scripts |
Verified Solutions | A+ Verified
• frequest starts and stops on a large electric motor will most likely cause. CORRECT
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. CORRECT ANSWER: stuck open
• which of the following is most likely to cause pipe friction losses to increse. CORRECT
ANSWER: increasign the velocity
• the mandrel test should be conducted to test new sewer lines that are constructed of
which material. CORRECT ANSWER: polyvinyl chloride pipe
• hydrogen peroxide solution eliminates/removes sulfides from wastewater by.
CORRECT ANSWER: oxidation
• a rehabilitation program must begin with. CORRECT ANSWER: a inventory of the
system
• why is replacing the wastewater collection system in some downtown streets difficult.
CORRECT ANSWER: there is crowding of other underground utilities
• sewer rate surcharges for commercial users are usually based on flow. CORRECT
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. CORRECT
ANSWER: ensure the manhole will not infiltrate
• for aerobic organisms to live and multiply they must have the. CORRECT 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. CORRECT 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.
CORRECT 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. CORRECT ANSWER:
adjust the variable frequency drive
• a pump curve is used to. CORRECT ANSWER: indicate how the motor and pump will
perform
• vacuum sewer systems are installed when. CORRECT 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. CORRECT
ANSWER: lockout/tagout
• what is the first consideration during the design of a sanitary collection system.
CORRECT ANSWER: size of the drainage area
• to help control hydrogen sulfide generation, which of the following types of chemicals
can be added to a wet well. CORRECT ANSWER: iron salts
• to correct a 3-phase electric motor that is running in the wrong direction after it has
been reinstalled an operator should. CORRECT ANSWER: switch any two motor leads
• a discharge line from a lift station constructed of rough pipe and many bends will
experience a higher. CORRECT ANSWER: total dynamic head
• high morale is generally associated with. CORRECT ANSWER: increased productivity
• the best advantage to using variable speed pumps is that they. CORRECT ANSWER:
produce a flow without rapid fluctuation
• why do electric motors draw more power when being started than while being
operated under normal conditions. CORRECT ANSWER: the motor has to start moving
the associated load
• the most effective method of confirming active lateral connections is. CORRECT
ANSWER: dye testing the service line
• the steel coupling half on a steel shaft of a pump motor is press fit. to remove the
coupling half an operator should. CORRECT ANSWER: heat the coupling and cool the
shaft
• the metal strip in an electrical fuse will melt from the heat caused by. CORRECT
ANSWER: excessive current
• a characteristic of an epoxy is that it. CORRECT ANSWER: is resistant to mild acids
