EXAM 2 - INTERMEDIATE WASTEWATER COLLECTION
QUESTIONS WITH CORRECT ANSWERS 2025
What tools would you use to remove or dislodge a stoppage? - CORRECT ANSWER -
Hand rodders
Vac-con
What would cause overload conditions on an electric motor? - CORRECT ANSWER -
Thermal overload
contaminants
bearing failure
old age
single phasing
What should crews do when not dealing with emergency situations? - CORRECT ANSWER -
Mapping
flush hydrants
complete schedule maintenance
inspect for infiltration and exfiltration
, What needs to be done to reduce hydraulic loads on a sewer system and wastewater treat
ment plant? - CORRECT ANSWER -Repair infiltration and exfiltration problems
There are three flows in a sanitary sewer, name them - CORRECT ANSWER -
BASE FLOW = Use water consumption records
INFILTRATION = total metered flow -
base flow during DRY weather and perform isolation flow measurements
INFLOW = total metered flow - (base flow + infiltration) during WET weather
What are the methods (devices) that may be used to measure groundwater levels? Name t
hem and where and how are they used. - CORRECT ANSWER -
Piezometer : Permanent installation like a well casing
Manhole gauge: Installed in M.H clear plastic tubing
Name the conditions where a smoke test is ineffective. - CORRECT ANSWER -
Windy conditions
ground is saturated
frozen
covered with snow
Name the two factors that govern the height of a platform in the inversion process. -
CORRECT ANSWER -Depth of sewer
QUESTIONS WITH CORRECT ANSWERS 2025
What tools would you use to remove or dislodge a stoppage? - CORRECT ANSWER -
Hand rodders
Vac-con
What would cause overload conditions on an electric motor? - CORRECT ANSWER -
Thermal overload
contaminants
bearing failure
old age
single phasing
What should crews do when not dealing with emergency situations? - CORRECT ANSWER -
Mapping
flush hydrants
complete schedule maintenance
inspect for infiltration and exfiltration
, What needs to be done to reduce hydraulic loads on a sewer system and wastewater treat
ment plant? - CORRECT ANSWER -Repair infiltration and exfiltration problems
There are three flows in a sanitary sewer, name them - CORRECT ANSWER -
BASE FLOW = Use water consumption records
INFILTRATION = total metered flow -
base flow during DRY weather and perform isolation flow measurements
INFLOW = total metered flow - (base flow + infiltration) during WET weather
What are the methods (devices) that may be used to measure groundwater levels? Name t
hem and where and how are they used. - CORRECT ANSWER -
Piezometer : Permanent installation like a well casing
Manhole gauge: Installed in M.H clear plastic tubing
Name the conditions where a smoke test is ineffective. - CORRECT ANSWER -
Windy conditions
ground is saturated
frozen
covered with snow
Name the two factors that govern the height of a platform in the inversion process. -
CORRECT ANSWER -Depth of sewer
