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