WASTEWATER OPERATOR
CERTIFICATION STUDY GUIDE GRADE 1
EXAM QUESTIONS WITH COMPLETE
SULUTIONS
WasteWater Sources & Characteristics:
What is the most common reason for a wastewater to contain intermittent large amounts
of sand, gravel, and grit? - ANSWERSstorm events
WasteWater Sources & Characteristics:
Combined wastewater is defined as - ANSWERSsanitary wastewater and stormwater
runoff
WasteWater Sources & Characteristics:
In general, the solids content in wastewater is about - ANSWERS0.1%
WasteWater Sources & Characteristics:
In general, what is the % of suspended solids in the total amount of solids -
ANSWERS30%
WasteWater Sources & Characteristics:
Generally, the % of dissolved solids in the amount of total solids is about -
ANSWERS70%
WasteWater Sources & Characteristics:
Which type of organisms would most probably be associated with poor treatment or
young biomass - ANSWERSamoebas
WasteWater Sources & Characteristics:
Which type of organisms would most probably be associated with very clear plant
effluent. low BOD and low amounts of suspended solids - ANSWERSstalked cilates
Basic WasteWater Treatment:
, Aerobic bacteria will reproduce and live in an environment that contains only -
ANSWERSoxygen
Basic WasteWater Treatment:
Anaerobic bacteria will reproduce and live only in an environment that completely lacks
- ANSWERSfree or dissolved oxygen
Basic WasteWater Treatment:
The biochemical oxygen demand (BOD) test usually has a specific time of -
ANSWERS5 days
Basic WasteWater Treatment:
An Imhoff cone measures - ANSWERSvolume of settleable solids
Basic WasteWater Treatment:
Septic conditions are caused by - ANSWERSanaerobic bacteria
Basic WasteWater Treatment:
Scum is usually removed in the _____treatment stage - ANSWERSprimary
Basic WasteWater Treatment:
When domestic wastewater enters natural waters, what species deplete most of the
oxygen - ANSWERSaerobic bacteria
Basic WasteWater Treatment:
Once the oxygen is depleted in a natural body of water, which organisms take over? -
ANSWERSanaerobic
Basic WasteWater Treatment:
The major gas produces by anaerobic decomposition is - ANSWERSmethane
Wastewater Treatment Facilities:
Another name for promary treatment is - ANSWERSsedimentation
Wastewater Treatment Facilities:
CERTIFICATION STUDY GUIDE GRADE 1
EXAM QUESTIONS WITH COMPLETE
SULUTIONS
WasteWater Sources & Characteristics:
What is the most common reason for a wastewater to contain intermittent large amounts
of sand, gravel, and grit? - ANSWERSstorm events
WasteWater Sources & Characteristics:
Combined wastewater is defined as - ANSWERSsanitary wastewater and stormwater
runoff
WasteWater Sources & Characteristics:
In general, the solids content in wastewater is about - ANSWERS0.1%
WasteWater Sources & Characteristics:
In general, what is the % of suspended solids in the total amount of solids -
ANSWERS30%
WasteWater Sources & Characteristics:
Generally, the % of dissolved solids in the amount of total solids is about -
ANSWERS70%
WasteWater Sources & Characteristics:
Which type of organisms would most probably be associated with poor treatment or
young biomass - ANSWERSamoebas
WasteWater Sources & Characteristics:
Which type of organisms would most probably be associated with very clear plant
effluent. low BOD and low amounts of suspended solids - ANSWERSstalked cilates
Basic WasteWater Treatment:
, Aerobic bacteria will reproduce and live in an environment that contains only -
ANSWERSoxygen
Basic WasteWater Treatment:
Anaerobic bacteria will reproduce and live only in an environment that completely lacks
- ANSWERSfree or dissolved oxygen
Basic WasteWater Treatment:
The biochemical oxygen demand (BOD) test usually has a specific time of -
ANSWERS5 days
Basic WasteWater Treatment:
An Imhoff cone measures - ANSWERSvolume of settleable solids
Basic WasteWater Treatment:
Septic conditions are caused by - ANSWERSanaerobic bacteria
Basic WasteWater Treatment:
Scum is usually removed in the _____treatment stage - ANSWERSprimary
Basic WasteWater Treatment:
When domestic wastewater enters natural waters, what species deplete most of the
oxygen - ANSWERSaerobic bacteria
Basic WasteWater Treatment:
Once the oxygen is depleted in a natural body of water, which organisms take over? -
ANSWERSanaerobic
Basic WasteWater Treatment:
The major gas produces by anaerobic decomposition is - ANSWERSmethane
Wastewater Treatment Facilities:
Another name for promary treatment is - ANSWERSsedimentation
Wastewater Treatment Facilities:
