WasteWater Operator Certification Study
Guide Grade 1 Questions and Correct Answers
WasteWater Sources & Characteristics:
What is the most common reason for a wastewater to contain intermittent large amounts of sand,
gravel, and grit? - CORRECT ANSWER storm events
WasteWater Sources & Characteristics:
Combined wastewater is defined as - CORRECT ANSWER sanitary wastewater and stormwater runoff
WasteWater Sources & Characteristics:
In general, the solids content in wastewater is about - CORRECT ANSWER 0.1%
WasteWater Sources & Characteristics:
, In general, what is the % of suspended solids in the total amount of solids - CORRECT ANSWER 30%
WasteWater Sources & Characteristics:
Generally, the % of dissolved solids in the amount of total solids is about - CORRECT ANSWER 70%
WasteWater Sources & Characteristics:
Which type of organisms would most probably be associated with poor treatment or young biomass -
CORRECT ANSWER 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 - CORRECT ANSWER stalked cilates
Basic WasteWater Treatment:
Aerobic bacteria will reproduce and live in an environment that contains only - CORRECT ANSWER
oxygen
Basic WasteWater Treatment:
Anaerobic bacteria will reproduce and live only in an environment that completely lacks - CORRECT
ANSWER free or dissolved oxygen
Basic WasteWater Treatment:
The biochemical oxygen demand (BOD) test usually has a specific time of - CORRECT ANSWER 5 days
Basic WasteWater Treatment:
An Imhoff cone measures - CORRECT ANSWER volume of settleable solids
Basic WasteWater Treatment:
Septic conditions are caused by - CORRECT ANSWER anaerobic bacteria
Basic WasteWater Treatment:
Guide Grade 1 Questions and Correct Answers
WasteWater Sources & Characteristics:
What is the most common reason for a wastewater to contain intermittent large amounts of sand,
gravel, and grit? - CORRECT ANSWER storm events
WasteWater Sources & Characteristics:
Combined wastewater is defined as - CORRECT ANSWER sanitary wastewater and stormwater runoff
WasteWater Sources & Characteristics:
In general, the solids content in wastewater is about - CORRECT ANSWER 0.1%
WasteWater Sources & Characteristics:
, In general, what is the % of suspended solids in the total amount of solids - CORRECT ANSWER 30%
WasteWater Sources & Characteristics:
Generally, the % of dissolved solids in the amount of total solids is about - CORRECT ANSWER 70%
WasteWater Sources & Characteristics:
Which type of organisms would most probably be associated with poor treatment or young biomass -
CORRECT ANSWER 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 - CORRECT ANSWER stalked cilates
Basic WasteWater Treatment:
Aerobic bacteria will reproduce and live in an environment that contains only - CORRECT ANSWER
oxygen
Basic WasteWater Treatment:
Anaerobic bacteria will reproduce and live only in an environment that completely lacks - CORRECT
ANSWER free or dissolved oxygen
Basic WasteWater Treatment:
The biochemical oxygen demand (BOD) test usually has a specific time of - CORRECT ANSWER 5 days
Basic WasteWater Treatment:
An Imhoff cone measures - CORRECT ANSWER volume of settleable solids
Basic WasteWater Treatment:
Septic conditions are caused by - CORRECT ANSWER anaerobic bacteria
Basic WasteWater Treatment:
