Exam (elaborations)
2024 OIT TRAINING MANUAL WASTEWATER COLLECTION MODULE 10 EXAM WITH CORRECT ANSWERS
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2024 OIT TRAINING MANUAL WASTEWATER COLLECTION MODULE 10 EXAM WITH CORRECT ANSWERS
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2024 OIT TRAINING MANUALWASTEWATER COLLECTION
MODULE 10 EXAM WITH CORRECT
ANSWERS
Wastewater - CORRECT-ANSWERSmay include domestic sewage, industrial,
commercial effluent
wastewater is removed - CORRECT-ANSWERSthrough sanitary sewers
three key problems with wastewater collection systems - CORRECT-
ANSWERSsewer surcharge, infiltraion of groundwater, exfiltration of
groundwater
buildup of organic/inorganic matter
Main sewers - CORRECT-ANSWERStransport waste from branch sewers to
larger trunk sewers.
lift stations - CORRECT-ANSWERSnecessary to raise wastewater to a higher
elevation
sewer surcharging - CORRECT-ANSWERSoccurs when a sewer is hydraulically
overloaded - too much wastewater trying to flow through a sewer.
sewer surcharging can - CORRECT-ANSWERSresult in flooding of basements
or be released onto roads
Contributing factors of sewer surcharging - CORRECT-ANSWERSinflow of
surface water into sewers + infilitration of groundwater into cracks in sewer
walls.
hydrogen sulphide buildup - CORRECT-ANSWERScan occur because of a
buildup of organic materials;
can cause unpleasant odours, corrosion of sewer lines and can also be
explosive
septic tank effluent gravity systems - CORRECT-ANSWERSsewage flows by
gravity; well suited for areas with low to moderate relief
, septic tank effluent pumping systems - CORRECT-ANSWERSpressurized
system using pumps to pump effluent
grinder pump systems - CORRECT-ANSWERSsewage is ground by a grinder
pump and is discharged to a low-pressure sewer system
Vacuum pump system - CORRECT-ANSWERSuses the suction of a vacuum to
draw and transport wastewater
alternative sewer collection systems - CORRECT-ANSWERSsuitable for
communities with shallow bedrock, high groundwater tables or topography
not conducive to conventional gravity sewers
gravity sewers - CORRECT-ANSWERSwastewater is transported with the use
of gravity
gravity collection system - CORRECT-ANSWERSindividual service lines -->
small lateral or branch sewer---> Main sewers--->Trunk sewers
branch sewers - CORRECT-ANSWERSsmall sewer (250-300mm); run under
streets and receive laterals from buildings along that street
Trunk sewers - CORRECT-ANSWERSlargest of the sewers, and the main
arteries of the wastewater collection system
wastewater lift stations - CORRECT-ANSWERSdesigned to move wastewater
from lower to higher elevation, especially when elevation of the source is not
sufficient for gravity flow.
Wet well - CORRECT-ANSWERSsealed undergound pit where sewage is fed
into and stored
Manholes - CORRECT-ANSWERSaccess to sewers
Sewers - CORRECT-ANSWERSpose health risks, are smelly and physically
dangerous;
accumulation of toxic or explosive gases is a problem
storm sewers - CORRECT-ANSWERSlarge pipes that carry strom water runoff
from yards and streets directly (without treatment) into a river, lake, or
ocean
combined sewer - CORRECT-ANSWERSA sewer designed to carry both
sanitary wastewater and storm-water or surface water runoff.
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