WASTEWATER OPERATOR CERTIFICATION STUDY GUIDE GRADE 1 QUESTIONS AND ANSWERS

WASTEWATER OPERATOR
CERTIFICATION STUDY GUIDE
GRADE 1 QUESTIONS AND ANSWERS


WasteWater Sources & Characteristics: sw sw sw




What is the most common reason for a wastewater to contain intermittent large amount
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s of sand, gravel, and grit? - ans-storm events
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WasteWater Sources & Characteristics: sw sw sw




Combined wastewater is defined as - ans-sanitary wastewater and stormwater runoff
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WasteWater Sources & Characteristics: sw sw sw




In general, the solids content in wastewater is about - ans-0.1%
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WasteWater Sources & Characteristics: sw sw sw




In general, what is the % of suspended solids in the total amount of solids - ans-30%
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WasteWater Sources & Characteristics: sw sw sw




Generally, the % of dissolved solids in the amount of total solids is about - ans-70%
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WasteWater Sources & Characteristics: sw sw sw




Which type of organisms would most probably be associated with poor treatment or yo
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ung biomass - ans-amoebas
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WasteWater Sources & Characteristics: sw sw sw




Which type of organisms would most probably be associated with very clear plant efflu
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ent. low BOD and low amounts of suspended solids - ans-stalked cilates
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Basic WasteWater Treatment:
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Aerobic bacteria will reproduce and live in an environment that contains only - ans-
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oxygen

, Basic WasteWater Treatment:
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Anaerobic bacteria will reproduce and live only in an environment that completely lacks
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- ans-free or dissolved oxygen
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Basic WasteWater Treatment:
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The biochemical oxygen demand (BOD) test usually has a specific time of - ans-
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5 days
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Basic WasteWater Treatment:
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An Imhoff cone measures - ans-volume of settleable solids
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Basic WasteWater Treatment:
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Septic conditions are caused by - ans-anaerobic bacteria
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Basic WasteWater Treatment:
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Scum is usually removed in the _____treatment stage - ans-primary
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Basic WasteWater Treatment:
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When domestic wastewater enters natural waters, what species deplete most of the ox
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ygen - ans-aerobic bacteria
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Basic WasteWater Treatment:
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Once the oxygen is depleted in a natural body of water, which organisms take over? -
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ans-anaerobic
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Basic WasteWater Treatment:
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The major gas produces by anaerobic decomposition is - ans-methane
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Wastewater Treatment Facilities: sw sw




Another name for promary treatment is - ans-sedimentation
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Wastewater Treatment Facilities: sw sw




Digester gas is_______when mixed with air the the proper proportions - ans-
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extremely explosive sw




Wastewater Treatment Facilities: sw sw