1
WasteWater Operator Certification Study
Guide Grade 1 Questions and Answers (100%
Correct Answers) Already Graded A+
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:
,2
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:
, 3
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 Operator Certification Study
Guide Grade 1 Questions and Answers (100%
Correct Answers) Already Graded A+
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:
,2
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:
, 3
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
