WasteWater Operator Certification Study
Guide Grade 1
WasteWater Sources & Characteristics:
What is the most common reason for a wastewater to contain intermittent large amounts of sand,
gravel, and grit? Ans- storm events
WasteWater Sources & Characteristics:
Combined wastewater is defined as Ans- sanitary wastewater and stormwater runoff
WasteWater Sources & Characteristics:
In general, the solids content in wastewater is about Ans- 0.1%
WasteWater Sources & Characteristics:
In general, what is the % of suspended solids in the total amount of solids Ans- 30%
WasteWater Sources & Characteristics:
Generally, the % of dissolved solids in the amount of total solids is about Ans- 70%
WasteWater Sources & Characteristics:
Which type of organisms would most probably be associated with poor treatment or young biomass
Ans- amoebas
,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 Ans- stalked cilates
Basic WasteWater Treatment:
Aerobic bacteria will reproduce and live in an environment that contains only Ans- oxygen
Basic WasteWater Treatment:
Anaerobic bacteria will reproduce and live only in an environment that completely lacks Ans- free or
dissolved oxygen
Basic WasteWater Treatment:
The biochemical oxygen demand (BOD) test usually has a specific time of Ans- 5 days
Basic WasteWater Treatment:
An Imhoff cone measures Ans- volume of settleable solids
Basic WasteWater Treatment:
Septic conditions are caused by Ans- anaerobic bacteria
Basic WasteWater Treatment:
Scum is usually removed in the _____treatment stage Ans- primary
, Basic WasteWater Treatment:
When domestic wastewater enters natural waters, what species deplete most of the oxygen Ans-
aerobic bacteria
Basic WasteWater Treatment:
Once the oxygen is depleted in a natural body of water, which organisms take over? Ans- anaerobic
Basic WasteWater Treatment:
The major gas produces by anaerobic decomposition is Ans- methane
Wastewater Treatment Facilities:
Another name for promary treatment is Ans- sedimentation
Wastewater Treatment Facilities:
Digester gas is_______when mixed with air the the proper proportions Ans- extremely explosive
Wastewater Treatment Facilities:
A pond that is used to treat raw wastewater is called Ans- a waste stabilization pond
Wastewater Treatment Facilities:
A pond that has an aerobic top layer and an anaerobic bottom layer is called Ans- a facultative pond
Guide Grade 1
WasteWater Sources & Characteristics:
What is the most common reason for a wastewater to contain intermittent large amounts of sand,
gravel, and grit? Ans- storm events
WasteWater Sources & Characteristics:
Combined wastewater is defined as Ans- sanitary wastewater and stormwater runoff
WasteWater Sources & Characteristics:
In general, the solids content in wastewater is about Ans- 0.1%
WasteWater Sources & Characteristics:
In general, what is the % of suspended solids in the total amount of solids Ans- 30%
WasteWater Sources & Characteristics:
Generally, the % of dissolved solids in the amount of total solids is about Ans- 70%
WasteWater Sources & Characteristics:
Which type of organisms would most probably be associated with poor treatment or young biomass
Ans- amoebas
,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 Ans- stalked cilates
Basic WasteWater Treatment:
Aerobic bacteria will reproduce and live in an environment that contains only Ans- oxygen
Basic WasteWater Treatment:
Anaerobic bacteria will reproduce and live only in an environment that completely lacks Ans- free or
dissolved oxygen
Basic WasteWater Treatment:
The biochemical oxygen demand (BOD) test usually has a specific time of Ans- 5 days
Basic WasteWater Treatment:
An Imhoff cone measures Ans- volume of settleable solids
Basic WasteWater Treatment:
Septic conditions are caused by Ans- anaerobic bacteria
Basic WasteWater Treatment:
Scum is usually removed in the _____treatment stage Ans- primary
, Basic WasteWater Treatment:
When domestic wastewater enters natural waters, what species deplete most of the oxygen Ans-
aerobic bacteria
Basic WasteWater Treatment:
Once the oxygen is depleted in a natural body of water, which organisms take over? Ans- anaerobic
Basic WasteWater Treatment:
The major gas produces by anaerobic decomposition is Ans- methane
Wastewater Treatment Facilities:
Another name for promary treatment is Ans- sedimentation
Wastewater Treatment Facilities:
Digester gas is_______when mixed with air the the proper proportions Ans- extremely explosive
Wastewater Treatment Facilities:
A pond that is used to treat raw wastewater is called Ans- a waste stabilization pond
Wastewater Treatment Facilities:
A pond that has an aerobic top layer and an anaerobic bottom layer is called Ans- a facultative pond
