Advanced Treatment Review Exam Questions with Correct Answers

True/False. Odor Control in wastewater collection systems and at wastewater treatment plants is very important. - Answer-True True/False. Each person has a different tolerance level for various odors. - Answer-True True/False. Odors are always removed by chlorine. - Answer-False. Not always True/False. Sampling is the only time operators should not handle liquid oxygen. - Answer-False. Sampling is the only time operators need to handle liquid oxygen. True/False. In the sludge reaeration (contact stabilization) variation of the activated sludge process, the return sludge rate is very significant. - Answer-True True/False. The character of any industrial wastewater depends on the particular production process and the way it is operated. - Answer-True True/False. Excessive use of defoamers in pulp mill wastewater may also add an undesirable oxygen demand on the system. - Answer-True True/False. The solids removed from the wastewater may either be disposed of or reused. - Answer-True True/False. Centrifuges are commonly used to thicken primary sludges. - Answer-False. Inlet assemblies on centrifuges clog easily. True/False. A seasonal fluctuation has been noted in chemical conditioning requirements so that many plants can successfully condition using cationic polymers during the summer and anionic polymers during the winter. - Answer-True True/False. Chemically stabilized and wet-oxidized sludges are suited for compost operations. - Answer-False True/False. The plate and frame filter press operates in a continuous mode. - Answer-False. It operates in batch mode True/False. Proper coagulation produces agglomerated solids particle units that tend to hold together and do not easily redisperse. - Answer-True True/False. Polymers carrying free electrical charges are (nonionic poly-electrolytes". - Answer-False. Polymers carry no free electrical charges are.