Email: bbcnoun@gmail.com Whatsapp: 08131667008 EHS409 Question: Advanced waste water treatement processes can produce potable water from waste water. Which is not an advanced waste water treatment process. Answer: Primary cholimation Question: What will not be part of the result if combined sewerage system is adopted for a city with frequent heavy rains. Answer: Back-flow of sewage will be rampant due to low pressure and poor gradient. Question: Which of the following factors will impart the least influence on waste water sedimentation in a sedimentation tank? Answer: Particle shape Question: What is not a reason for monitoring fats, oils and greese (FOG) in waste-water. Answer: FOG can be recovered and recycled for re-use in the kitchen. Question: Which is not true of comminutor and grinder processes in waste water treatment. Answer: To improve efficiency, comminuting and grinding devices should treat waste water before the sceening process. Question: What set of components detracts from the list of components of sewage as described by WAHEB (1991) Answer: Lundry waste water; condensed waste water from evaporator units. Question: Which of the following types of Biochemical Oxygen Demand (BOD) is the most popular. Answer: BOD5 Question: Which is not characteristic of simplified sewage system? Answer: Cost of installation and maintenance will be higher. Question: Which of the following sludge treatmjent has the greatest impact of BOD reduction? Answer: Stabilization Question: There are some waste waters that are not sewage, and need not be dischage into the sewerage system. They include the following except: Answer: Effluenct from laundaries Email: bbcnoun@gmail.com Whatsapp: 08131667008