WASTEWATER COLLECTIONS CLASS
D TEST QUESTIONS EXAM WITH
COMPLETE SOLUTIONS
Why is it dangerous to drive over a rocking or improperly seated manhole lid? -ANSIt
can flip over and cause an accident or damage to a vehicle
What are the safe oxygen levels? -ANS19.5-23.5
What does F.O.G. stand for? -ANSFats, Oils, and Grease
What is used to clean a force main? -ANSPig
What does the locate color yellow mean? -ANSGas line
How far away from an excavation must dirt be kept back? -ANS2'
What does the term inflow refer to? -ANSWater discharge into a collection system from
an outside source
What should be done before working on any equipment that could start up or release
stored energy? -ANSLock out tag out procedures
How often should you an existing manhole be inspected? -ANSEvery 1-5 years
What can be located using smoke testing? -ANSBroken sewers due to settling of
foundations, manholes, and other structures.
What is one way plumbers can create obstructions in systems? -ANSThe placement of
building sewer taps protruding into the main sewer.
What directions should the cleaning nozzle of a high-velocity cleaner be pointed during
cleaning? -ANSUpstream of the operating manhole
What types of sewer line problems can be located by using the mandrel test? -
ANSBuilding sewer connections that protrude into the main lines.
Who should be notified when conducting upstream inspection activities? -
ANSTreatment plant operators and industrial waste inspectors.
When basements flood what should be shut off? -ANSElectrical and gas utilities
D TEST QUESTIONS EXAM WITH
COMPLETE SOLUTIONS
Why is it dangerous to drive over a rocking or improperly seated manhole lid? -ANSIt
can flip over and cause an accident or damage to a vehicle
What are the safe oxygen levels? -ANS19.5-23.5
What does F.O.G. stand for? -ANSFats, Oils, and Grease
What is used to clean a force main? -ANSPig
What does the locate color yellow mean? -ANSGas line
How far away from an excavation must dirt be kept back? -ANS2'
What does the term inflow refer to? -ANSWater discharge into a collection system from
an outside source
What should be done before working on any equipment that could start up or release
stored energy? -ANSLock out tag out procedures
How often should you an existing manhole be inspected? -ANSEvery 1-5 years
What can be located using smoke testing? -ANSBroken sewers due to settling of
foundations, manholes, and other structures.
What is one way plumbers can create obstructions in systems? -ANSThe placement of
building sewer taps protruding into the main sewer.
What directions should the cleaning nozzle of a high-velocity cleaner be pointed during
cleaning? -ANSUpstream of the operating manhole
What types of sewer line problems can be located by using the mandrel test? -
ANSBuilding sewer connections that protrude into the main lines.
Who should be notified when conducting upstream inspection activities? -
ANSTreatment plant operators and industrial waste inspectors.
When basements flood what should be shut off? -ANSElectrical and gas utilities
