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1PROBLEM: The chlorine residual is falling, and inspection of the 150-lb. cylinder and chlorine feed equipment shows ice forming on the chlorine regulator and feed lines. The BEST method to fix the falling chlorine residual is?switch over to sodium hypochlorite solutionplace a second chlorine cylinder on-lineroll the cylinder so liquid is feeding instead of gasplace a 1500W space heater next to the cylinder to thaw the ice2Managers are judged by:What they get others to doTheir personalityWhat they doHow fast they work3How many gallons will the single-piston, reciprocating sludge pump discharge per minute if the piston bore (diameter) is 6 inches and the stroke length is 11 inches? The pump runs at 99 revolutions per minute. Select the closest answer.a.17 gpmb.23 gpmc.75 gpmd.134 gpm4 Which style of management would be most effective in an emergency situation?AutocraticConsultativeDelegatingParticipative 5A common remedy for activated sludge system problems is to increase the waste activated sludge (WAS) flow rate. When would an increase of WAS rate NOT be correct? When pin-point floc is observed on the clarifier surface When thick, scummy foam is seen on the aeration tank surface When the aeration system is critically under-loadedWhen straggler floc is present in clarifier and settleometer6Problem: There are high solids in the applied water to the multimedia filters due to bulking sludge in the secondary clarifiers. Polymer is used as a filter aid chemical. What is the BEST method to correct the plant problem?Add chlorine to the WAS to control the bulking sludge conditionPlace additional chlorine contact tanks on lineRun jar tests then adjust the chemical dosage as determinedReduce the filter backwash frequency, increase the effluent chlorine feed7 When solving a group conflict, you should:Establish a winner and loser groupResolve it in such a way that there is no apparent winner or loserSmooth over the problem and hope it will go away with timeSupport the position with the most people involved 8 Supervisors have the tendency to spend most of their time on this function:DirectingControllingPlanningStaffing 9 In the Modified Ludzack-Ettinger (MLE) process, denitrification occurs in which tank?anoxic tankanaerobic tankpost-anaerobic tanknitrification filters10 Which theory of management describes the boss who believes people are lazy, and need constant supervision?Theory XTheory YTheory ZDemocratic theory 11The point, location or structure where wastewater discharges from a sewer, drain, or other conduit is called what?a.Wetlandb.Outfallc.Swamp-landd.Force-main12When taking disciplinary action, you shouldArgue with the employeeAllow an employee to speak for the others involvedMake the disciplinary process as formal and uncomfortable as possibleEnforce policies and rules with consistency 13 The volatile acid to alkalinity ratio of a properly operating anaerobic digester is0.1 parts acid to one part alkalinity0.4 parts acid to one part alkalinity0.8 parts acid to one part alkalinity1.0 parts acid to one part alkalinity14The freedom to act, make decisions, and challenge one’s self to be more creative fits which of Maslow’s hierarchy of needs?Social needsSecurity needsBasic needsSelf-fulfillment needs 15Which condition of a receiving water will allow more DO saturation?Warm temperaturesCold temperaturesHigh pHLow pH16PROBLEM:Solids are washing out of the secondary clarifier of the activated sludge plant. Plant personnel increase the return activated sludge (RAS) flow rate, which slows the problem temporarily, but then it worsens after 30 minutes. What is the cause of the plant problem?increasing the RAS increased the detention time in the clarifierincreasing the RAS decreased the detention time in the clarifierincreasing the RAS increased the detention time in the aeration tankincreasing the RAS caused the DO in the aeration tank to increase17Given the following data, what is the most likely cause of the upflow, continuous backwash tertiary filter problem?Data: All filters operatingReject valves open 50%Effluent valves open 100%Influent valve open 100%Filter level is normalPoor filtrate quality Effluent valve open too muchReject water flow rate too lowToo many filters on-lineInfluent valve open too much18When resolving problems between two employees, the manager should:Base all decisions on the employees’ attitudesRemember that differences exist between employees’ personalitiesMake your decision based on the employees’ behaviorStall for time because time fixes everything 19Waste activated sludge is pumped into the aerobic digester at 77% volatile solids. After one week of digestion, sludge is applied to the drying beds at 69% volatile solids. In relation to EPA 40 CFR part 503 regulations on vector attraction reduction, criteria #1: 38% volatile solids reduction, how many percent over OR under the requirement is the sludge?4.5 % over3% under4.5% under28% over20Which managerial function clarifies the boundaries of authority and responsibility within a department?PlanningOrganizingDirectingControlling 21PROBLEM: The belt press has large volumes of water carrying into the dewatering zone and overrunning the sides of the belt. The polymer feed system is NOT the problem. What is the MOST likely cause?a.Belt speed too lowb.Belt speed too highc.Belt tension too lowd.Doctor blades need adjustment22 A common problem associated with ammonia stripping isSodium aluminate scaleCalcium carbonate scaleHydrogen sulfide oxidationHigh energy costs to operate pumping equipment23 The process or activity of optimally utilizing human resources to achieve predetermined goals and objectives in the most efficient and effective way possible is:DirectingControllingPlanningOrganizing 24 In the luxury-uptake method of phosphorus removal, organisms release phosphorus during which phase of treatment?Aerobic phaseAnoxic phaseAnaerobic phaseBardenpho phase25PROBLEM: Plant effluent coliform count fails to meet required standards for disinfection. Chlorine residual is normal. Disinfectant supplies are not a problem. What is the most probable cause?Capacity of chlorinator too lowToo little solids in effluentContact time too shortChlorine demand too high26Using the breakpoint chlorination method of ammonia removal, approximately how many parts of chlorine are needed to remove one part of ammonia?2 parts5 parts10 parts25 parts27The operator starts a digested sludge pump to transfer sludge from a primary digester to a secondary digester at a treatment plant. Using the data below, calculate how long, in hours, it will take to pump the target transfer amount of 3.5 feet.Digested sludge pump flow rate = 85 gpmDigester surface area = 3,000 sq. ft.Digester depth = 30 feet1.5 hours4.7 hours7.8 hours15.4 hours28When nitrification occurs in an aeration tank, the expected conditions at the end of the aerated zone would be:A decrease in ammonium, nitrate and alkalinity, an increase in pHAn increase in nitrate and nitrite, a decrease in alkalinity and pHA reduction of alkalinity and nitrate, an increase in ammonium and pHAn increase in pH, alkalinity, nitrate and ammonium29The right or privilege to direct or request a behavior or action, along with the right to discipline is:Control PowerAuthorityLeadership 30Measuring the water pressure above and below filter media is a way of determiningUnit Filter Run Volume (UFRV)Filtration rates (GPD/sq. ft.)Mud ball production rateHead loss31The availability of which element or compound will reduce the efficiency of the denitrification process?Free Oxygen (O2)Methanol (CH3OH)Acetic Acid (CH3COOH)Nitrate (NO3)32The preservative used for transport of the fecal coliform sample is:0.2% sulfuric acid0.5% nitric acidIce to 4°CIce the sample for no less than 6 hours minimum33The upper limit of employees or subordinates a supervisor can effectively manage is called:Span of manpowerSpan of controlSpan of organizationSpan of functions 34The theory of Unity of Command is:Where each working unit has one person in charge with authority to make decisions up to a certain levelWhere each working unit has multiple people in charge and a vote is taken when decisions must be madeWhere each working unit has many departments, and no one person is in chargeNone of the above 35What is the required brake horsepower (BHP) of the pump to move the water described below?Feet of head: 200 feetPump efficiency: 88%Flow rate needed: 900 GPMPump impeller diameter: 11.5 inchesDischarge pipe diameter: 16 inches 5.1 BHP8.5 BHP15.1 BHP52.0 BHP36According to Chapter 62-640, Domestic Wastewater Residuals, the definition of a pathogen includes viruses, bacteria, protozoa or what other indicator organism?Rat eggsViable helminth ovaLiving amoeba eggsLive embryonic stem cells37Which of the following three factors affects an employee's motivation?Attitude, interests, and needsAttitude, interests, and salaryAttitude, interests, and working conditionsAttitude, needs, and salary 38According to FDEP chapter 62-601, FAC, a composite sample shall be used for which test?Total chlorine residualEffluent CBODEffluent pHEffluent fecal coliform39An overdose of alum when used as a filtration aid can be observed by the operator when:The backwash water contains metallic flakesA cloudy appearance is noticed in the effluent of the filterMud ball formation is noticeably decreasedThe unit filter run volume (UFRV) has increased40Quality circles and quality of life management styles are often referred to as:Japanese styleGerman styleAutocratic styleTheory X style 41Using the data given below, calculate the new waste sludge flow rate to achieve the target MCRT.Aeration tank capacity: 3.8 MGPlant flow: 5.6 MGDAeration tank MLSS: 3,400 mg/LRAS ss: 8,000 mg/LCurrent waste flow rate: 130,000 GPDEffluent TSS: 5.0 mg/LTarget MCRT: 9 days 0.084 MGD0.130 MGD0.176 MGD0.234 MGD42Dark brown, almost gray/black sudsy foam on the aeration tank surface. Mixed liquor color is very dark brown, to almost black. There is the detection of a septic or sour odor in the area of the aeration tank. What is the BEST method to correct the problem?Decrease the RAS rate to decrease the clarifier detention timeIncrease the WAS rate to wash the septic sludge from the systemIncrease the air SCFM to maintain proper DODecrease the air SCFM to conserve 43Odor complaints are increasing at the wwtp. The operator finds most odors seem to be coming from the primary clarifiers where bubbles and chunks of solids are found on the tank surface. What should be done to correct the problem?Cover the secondary clarifiersIncrease the pretreatment chlorine dosageIncrease the sludge withdrawal from the primary clarifiersadd potassium permanganate or hydrogen peroxide to the upstream lift stations44As the pH values rise, the expected effect on the available ammonium ion and dissolved ammonia gas would beall the ammonia is converted to ammoniumthe ammonium is converted to organic nitrogenthe ammonium is converted to dissolved ammonia gasthe dissolved ammonia gas is converted to nitrate45Ammonification occurs where?chlorine contact tanksewage collection systemclarifierlaboratory46A microscopic exam shows a predominance of amoebae, flagellates with a few free swimming ciliates. The floc appears large and irregularly shaped and not very dense. What is the condition of the MLSS?Over-oxidizedUnder-oxidizedOld sludgeLow in volatile suspended solids47Chapter 62-601 FAC, Domestic Wastewater Treatment Plant Monitoring, states: “For systems involving high-level disinfection, compliance with the TSS limitation shall be achieved, and sampled for” where?After clarification, but before final filtrationAfter the filter, but before application of the disinfectantAfter chlorination, and before de-chlorinationAfter the disinfectant, and before the filter48Normal domestic wastewater has an alkalinity ofless than 50 mg/L CaCO3100 mg/L CaCO310,000 mg/L CaCO3Characteristics of the raw water supply influence alkalinity49A reduction of alkalinity across the secondary treatment process likely indicates what?Anaerobic conditionsAnoxic conditionsNitrification is occurringDenitrification is occurring50In a lab, a dilute acid solution must be prepared for titration in the alkalinity test. The proper procedure for making the weak acid is to:Add the water slowly to the concentrated acid to begin dilutionAdd the water quickly to the acid to begin dilutionAdd the acid directly to the sample without dilutionAdd the acid slowly to the dilution water16225280Answer Key4000020000Answer KeyBADADCBAAABDADBBBBCBABDCCCDBCDACBADBABBACCCCBBBDCD ................
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