WasteWater Operator Certification Study Guide Grade 1 Questions 100% Answered

WasteWater Operator Certification Study Guide Grade 1 Questions 100% AnsweredWasteWater Sources & Characteristics: What is the most common reason for a wastewater to contain intermittent large amounts of sand, gravel, and grit? -ANSWER storm events WasteWater Sources & Characteristics: Combined wastewater is defined as -ANSWER sanitary wastewater and stormwater runoff WasteWater Sources & Characteristics: In general, the solids content in wastewater is about -ANSWER 0.1% WasteWater Sources & Characteristics: In general, what is the % of suspended solids in the total amount of solids -ANSWER 30% WasteWater Sources & Characteristics: Generally, the % of dissolved solids in the amount of total solids is about -ANSWER 70% WasteWater Sources & Characteristics: Which type of organisms would most probably be associated with poor treatment or young biomass -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 -ANSWER stalked cilates Basic WasteWater Treatment: Aerobic bacteria will reproduce and live in an environment that contains only -ANSWER oxygen Basic WasteWater Treatment: Anaerobic bacteria will reproduce and live only in an environment that completely lacks -ANSWER free or dissolved oxygen Basic WasteWater Treatment: The biochemical oxygen demand (BOD) test usually has a specific time of -ANSWER 5 days Basic WasteWater Treatment: An Imhoff cone measures -ANSWER volume of settleable solids Basic WasteWater Treatment: Septic conditions are caused by -ANSWER anaerobic bacteria Basic WasteWater Treatment: Scum is usually removed in the _____treatment stage -ANSWER primary Basic WasteWater Treatment: When domestic wastewater enters natural waters, what species deplete most of the oxygen -ANSWER aerobic bacteria Basic WasteWater Treatment: Once the oxygen is depleted in a natural body of water, which organisms take over? -ANSWER anaerobic Basic WasteWater Treatment: The major gas produces by anaerobic decomposition is -ANSWER methane Wastewater Treatment Facilities: Another name for promary treatment is -ANSWER sedimentation Wastewater Treatment Facilities: Digester gas is_______when mixed with air the the proper proportions -ANSWER ex