WasteWater Operator Certification Study Guide Grade 1 Test
Questions with Verified Answers
WasteWater Sources & Characteristics:
What is the most common reason for a
wastewater to contain intermittent large amounts WasteWater Sources & Characteristics:
of sand, gravel, and grit? - ANSWER -
storm events Which type of organisms would most probably be
associated with very clear plant effluent. low BOD
and low amounts of suspended solids -
ANSWER -stalked cilates
WasteWater Sources & Characteristics:
Combined wastewater is defined as -
ANSWER -sanitary wastewater and Basic WasteWater Treatment:
stormwater runoff
Aerobic bacteria will reproduce and live in an
environment that contains only - ANSWER -
oxygen
WasteWater Sources & Characteristics:
In general, the solids content in wastewater is
about - ANSWER -0.1% Basic WasteWater Treatment:
Anaerobic bacteria will reproduce and live only in
an environment that completely lacks -
WasteWater Sources & Characteristics: ANSWER -free or dissolved oxygen
In general, what is the % of suspended solids in
the total amount of solids - ANSWER -30%
Basic WasteWater Treatment:
The biochemical oxygen demand (BOD) test
WasteWater Sources & Characteristics: usually has a specific time of - ANSWER -5
days
Generally, the % of dissolved solids in the
amount of total solids is about - ANSWER -
70%
Basic WasteWater Treatment:
An Imhoff cone measures - ANSWER -
WasteWater Sources & Characteristics: volume of settleable solids
Which type of organisms would most probably be
associated with poor treatment or young biomass
- ANSWER -amoebas Basic WasteWater Treatment:
, WasteWater Operator Certification Study Guide Grade 1 Test
Questions with Verified Answers
Septic conditions are caused by - Digester gas is_______when mixed with air the
ANSWER -anaerobic bacteria the proper proportions - ANSWER -
extremely explosive
Basic WasteWater Treatment:
Wastewater Treatment Facilities:
Scum is usually removed in the _____treatment
stage - ANSWER -primary A pond that is used to treat raw wastewater is
called - ANSWER -a waste stabilization
pond
Basic WasteWater Treatment:
When domestic wastewater enters natural Wastewater Treatment Facilities:
waters, what species deplete most of the oxygen
- ANSWER -aerobic bacteria A pond that has an aerobic top layer and an
anaerobic bottom layer is called -
ANSWER -a facultative pond
Basic WasteWater Treatment:
Once the oxygen is depleted in a natural body of Preliminary Treatment:
water, which organisms take over? -
ANSWER -anaerobic What is the angle of the bars on a manually
cleaned bar screen? - ANSWER -30
degrees
Basic WasteWater Treatment:
The major gas produces by anaerobic Preliminary Treatment:
decomposition is - ANSWER -methane
What is the angle of the bards on a mechanically
cleaned bar screen - ANSWER -45-60
degrees
Wastewater Treatment Facilities:
Another name for promary treatment is -
ANSWER -sedimentation Preliminary Treatment:
What is the ideal wastewater velocity in FPS
through a screen channel? - ANSWER -
Wastewater Treatment Facilities: 1.5ft/s
Questions with Verified Answers
WasteWater Sources & Characteristics:
What is the most common reason for a
wastewater to contain intermittent large amounts WasteWater Sources & Characteristics:
of sand, gravel, and grit? - ANSWER -
storm events Which type of organisms would most probably be
associated with very clear plant effluent. low BOD
and low amounts of suspended solids -
ANSWER -stalked cilates
WasteWater Sources & Characteristics:
Combined wastewater is defined as -
ANSWER -sanitary wastewater and Basic WasteWater Treatment:
stormwater runoff
Aerobic bacteria will reproduce and live in an
environment that contains only - ANSWER -
oxygen
WasteWater Sources & Characteristics:
In general, the solids content in wastewater is
about - ANSWER -0.1% Basic WasteWater Treatment:
Anaerobic bacteria will reproduce and live only in
an environment that completely lacks -
WasteWater Sources & Characteristics: ANSWER -free or dissolved oxygen
In general, what is the % of suspended solids in
the total amount of solids - ANSWER -30%
Basic WasteWater Treatment:
The biochemical oxygen demand (BOD) test
WasteWater Sources & Characteristics: usually has a specific time of - ANSWER -5
days
Generally, the % of dissolved solids in the
amount of total solids is about - ANSWER -
70%
Basic WasteWater Treatment:
An Imhoff cone measures - ANSWER -
WasteWater Sources & Characteristics: volume of settleable solids
Which type of organisms would most probably be
associated with poor treatment or young biomass
- ANSWER -amoebas Basic WasteWater Treatment:
, WasteWater Operator Certification Study Guide Grade 1 Test
Questions with Verified Answers
Septic conditions are caused by - Digester gas is_______when mixed with air the
ANSWER -anaerobic bacteria the proper proportions - ANSWER -
extremely explosive
Basic WasteWater Treatment:
Wastewater Treatment Facilities:
Scum is usually removed in the _____treatment
stage - ANSWER -primary A pond that is used to treat raw wastewater is
called - ANSWER -a waste stabilization
pond
Basic WasteWater Treatment:
When domestic wastewater enters natural Wastewater Treatment Facilities:
waters, what species deplete most of the oxygen
- ANSWER -aerobic bacteria A pond that has an aerobic top layer and an
anaerobic bottom layer is called -
ANSWER -a facultative pond
Basic WasteWater Treatment:
Once the oxygen is depleted in a natural body of Preliminary Treatment:
water, which organisms take over? -
ANSWER -anaerobic What is the angle of the bars on a manually
cleaned bar screen? - ANSWER -30
degrees
Basic WasteWater Treatment:
The major gas produces by anaerobic Preliminary Treatment:
decomposition is - ANSWER -methane
What is the angle of the bards on a mechanically
cleaned bar screen - ANSWER -45-60
degrees
Wastewater Treatment Facilities:
Another name for promary treatment is -
ANSWER -sedimentation Preliminary Treatment:
What is the ideal wastewater velocity in FPS
through a screen channel? - ANSWER -
Wastewater Treatment Facilities: 1.5ft/s
