Wastewater Collections Class D Test |||| |||| |||| |||| ||||
Questions with verified detailed solutions |||| |||| |||| ||||
Why is it dangerous to drive over a rocking or improperly seated manhole lid? -
|||| |||| |||| |||| |||| |||| |||| |||| |||| |||| |||| |||| |||| |||| ||||
correct answer✔✔It can flip over and cause an accident or damage to a vehicle
|||| |||| |||| |||| |||| |||| |||| |||| |||| |||| |||| |||| ||||
What are the safe oxygen levels? - correct answer✔✔19.5-23.5
|||| |||| |||| |||| |||| |||| |||| ||||
What does F.O.G. stand for? - correct answer✔✔Fats, Oils, and Grease
|||| |||| |||| |||| |||| |||| |||| |||| |||| ||||
What is used to clean a force main? - correct answer✔✔Pig
|||| |||| |||| |||| |||| |||| |||| |||| |||| ||||
What does the locate color yellow mean? - correct answer✔✔Gas line
|||| |||| |||| |||| |||| |||| |||| |||| |||| ||||
How far away from an excavation must dirt be kept back? - correct answer✔✔2'
|||| |||| |||| |||| |||| |||| |||| |||| |||| |||| |||| |||| ||||
What does the term inflow refer to? - correct answer✔✔Water 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? - correct answer✔✔Lock out tag out procedures
|||| |||| |||| |||| |||| |||| |||| |||| ||||
How often should you an existing manhole be inspected? - correct
|||| |||| |||| |||| |||| |||| |||| |||| |||| |||| ||||
answer✔✔Every 1-5 years |||| ||||
What can be located using smoke testing? - correct answer✔✔Broken sewers
|||| |||| |||| |||| |||| |||| |||| |||| |||| |||| ||||
due to settling of foundations, manholes, and other structures.
|||| |||| |||| |||| |||| |||| |||| ||||
, What is one way plumbers can create obstructions in systems? - correct
|||| |||| |||| |||| |||| |||| |||| |||| |||| |||| |||| ||||
answer✔✔The 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? - correct answer✔✔Upstream of the operating manhole
|||| |||| |||| |||| |||| |||| |||| ||||
What types of sewer line problems can be located by using the mandrel test? -
|||| |||| |||| |||| |||| |||| |||| |||| |||| |||| |||| |||| |||| |||| ||||
correct answer✔✔Building sewer connections that protrude into the main lines.
|||| |||| |||| |||| |||| |||| |||| |||| ||||
Who should be notified when conducting upstream inspection activities? -
|||| |||| |||| |||| |||| |||| |||| |||| |||| ||||
correct answer✔✔Treatment plant operators and industrial waste inspectors.
|||| |||| |||| |||| |||| |||| ||||
When basements flood what should be shut off? - correct answer✔✔Electrical
|||| |||| |||| |||| |||| |||| |||| |||| |||| |||| ||||
and gas utilities
|||| ||||
Who hires collections system operators? - correct answer✔✔City, county, a
|||| |||| |||| |||| |||| |||| |||| |||| |||| ||||
special purpose district or a sanitation district, or a private utility company.
|||| |||| |||| |||| |||| |||| |||| |||| |||| |||| ||||
Which O&M programs are similar to those of wastewater collection systems? -
|||| |||| |||| |||| |||| |||| |||| |||| |||| |||| |||| ||||
correct answer✔✔Other utilities |||| ||||
What type of pipe joints are available for nearly all types of pipe used in collection
|||| |||| |||| |||| |||| |||| |||| |||| |||| |||| |||| |||| |||| |||| ||||
systems today? - correct answer✔✔Push-on
|||| |||| |||| |||| ||||
What is the purpose of interconnector sewers? - correct answer✔✔To allow the
|||| |||| |||| |||| |||| |||| |||| |||| |||| |||| |||| ||||
regulation of wastewater flows in parallel sewers or the automatic diversion of |||| |||| |||| |||| |||| |||| |||| |||| |||| |||| |||| ||||
wastewater to an alternate sewer if the primary sewer becomes blocked. |||| |||| |||| |||| |||| |||| |||| |||| |||| ||||
Questions with verified detailed solutions |||| |||| |||| ||||
Why is it dangerous to drive over a rocking or improperly seated manhole lid? -
|||| |||| |||| |||| |||| |||| |||| |||| |||| |||| |||| |||| |||| |||| ||||
correct answer✔✔It can flip over and cause an accident or damage to a vehicle
|||| |||| |||| |||| |||| |||| |||| |||| |||| |||| |||| |||| ||||
What are the safe oxygen levels? - correct answer✔✔19.5-23.5
|||| |||| |||| |||| |||| |||| |||| ||||
What does F.O.G. stand for? - correct answer✔✔Fats, Oils, and Grease
|||| |||| |||| |||| |||| |||| |||| |||| |||| ||||
What is used to clean a force main? - correct answer✔✔Pig
|||| |||| |||| |||| |||| |||| |||| |||| |||| ||||
What does the locate color yellow mean? - correct answer✔✔Gas line
|||| |||| |||| |||| |||| |||| |||| |||| |||| ||||
How far away from an excavation must dirt be kept back? - correct answer✔✔2'
|||| |||| |||| |||| |||| |||| |||| |||| |||| |||| |||| |||| ||||
What does the term inflow refer to? - correct answer✔✔Water 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? - correct answer✔✔Lock out tag out procedures
|||| |||| |||| |||| |||| |||| |||| |||| ||||
How often should you an existing manhole be inspected? - correct
|||| |||| |||| |||| |||| |||| |||| |||| |||| |||| ||||
answer✔✔Every 1-5 years |||| ||||
What can be located using smoke testing? - correct answer✔✔Broken sewers
|||| |||| |||| |||| |||| |||| |||| |||| |||| |||| ||||
due to settling of foundations, manholes, and other structures.
|||| |||| |||| |||| |||| |||| |||| ||||
, What is one way plumbers can create obstructions in systems? - correct
|||| |||| |||| |||| |||| |||| |||| |||| |||| |||| |||| ||||
answer✔✔The 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? - correct answer✔✔Upstream of the operating manhole
|||| |||| |||| |||| |||| |||| |||| ||||
What types of sewer line problems can be located by using the mandrel test? -
|||| |||| |||| |||| |||| |||| |||| |||| |||| |||| |||| |||| |||| |||| ||||
correct answer✔✔Building sewer connections that protrude into the main lines.
|||| |||| |||| |||| |||| |||| |||| |||| ||||
Who should be notified when conducting upstream inspection activities? -
|||| |||| |||| |||| |||| |||| |||| |||| |||| ||||
correct answer✔✔Treatment plant operators and industrial waste inspectors.
|||| |||| |||| |||| |||| |||| ||||
When basements flood what should be shut off? - correct answer✔✔Electrical
|||| |||| |||| |||| |||| |||| |||| |||| |||| |||| ||||
and gas utilities
|||| ||||
Who hires collections system operators? - correct answer✔✔City, county, a
|||| |||| |||| |||| |||| |||| |||| |||| |||| ||||
special purpose district or a sanitation district, or a private utility company.
|||| |||| |||| |||| |||| |||| |||| |||| |||| |||| ||||
Which O&M programs are similar to those of wastewater collection systems? -
|||| |||| |||| |||| |||| |||| |||| |||| |||| |||| |||| ||||
correct answer✔✔Other utilities |||| ||||
What type of pipe joints are available for nearly all types of pipe used in collection
|||| |||| |||| |||| |||| |||| |||| |||| |||| |||| |||| |||| |||| |||| ||||
systems today? - correct answer✔✔Push-on
|||| |||| |||| |||| ||||
What is the purpose of interconnector sewers? - correct answer✔✔To allow the
|||| |||| |||| |||| |||| |||| |||| |||| |||| |||| |||| ||||
regulation of wastewater flows in parallel sewers or the automatic diversion of |||| |||| |||| |||| |||| |||| |||| |||| |||| |||| |||| ||||
wastewater to an alternate sewer if the primary sewer becomes blocked. |||| |||| |||| |||| |||| |||| |||| |||| |||| ||||
