Download Florida Wastewater Operator Class B Certification Exam 2025 and more Exams Nursing in PDF only on Docsity!
FLORIDA WASTEWATER OPERATOR
CLASS B CERTIFICATION EXAM 2025
A common remedy for activated sludge system problems is to increase the waste activated sludge flow rate, when would an increase of WAS rate not be correct? - Precise Answer ✔✔When straggler Floc is present in clarifier and settleometer The chlorine residual is falling An inspection of the 150lb 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? - Precise Answer ✔✔Put another chlorine cylinder online Caution must be used when adding caustic chemical to a digester. Lime can combine with carbon dioxide in the digester to form what problem? - Precise Answer ✔✔A dangerous vacuum How 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.
- Precise Answer ✔✔134gpm solve MCRT: Flow: 3.6mgd Basin volume: 5.0mg
MLSS:2350mg/l WAS ss:4800mg/l WAS flow: 150000gpd Eff tss: 15mg/l - Precise Answer ✔✔15 days There are high suspended solids in the water applied to the filters due to bulking sludge in the secondary clarifiers. Polymer is used as a filter aid chemical, but the effluent ability is worsening. What is the best method to correct the filter problem? - Precise Answer ✔✔Run jar tests to determine best Polymer dosage An advantage of a continuous backwash, up flow, deep bed sand filters is? - Precise Answer ✔✔Filters do not need to be taken out of service for backwashing The aeration tank dissolved oxygen has been running normal, 1.5 to 2. mg/L the whole month. Today's D.O. reading has spiked to nearly 6.0 mg/L in the aeration tank and the clarifier and plant effluent or cloudy. What is the most likely cause of the rise in D.O.? - Precise Answer ✔✔A toxic shock load of cyanide has entered the plant Plant fecal coliform counts do not meet state standards.
When operating upflow, continuous backwash sand filter that is discharging poor filtrate. What should you check? - Precise Answer ✔✔reject/washwater valves When using lime to precipitate phosphorus from treated effluent, it is important to maintain the pH at or above - Precise Answer ✔✔11. Upward force of groundwater on sedimentation tank? groundwater depth: 6ft above tank bottom Tank width: 80ft wide Tank length: 157ft long - Precise Answer ✔✔4,700,000lbs Luxury uptake phosphorus removal method is failing to remove permitted levels: Influent phosphorus is 8 mg/L. Fermentation basin phosphorus level is 10 mg/L. Aeration basin phosphorus is 8 mg/L. Effluent exceeds 1.0mg/l - Precise Answer ✔✔Poor release of phosphorus in fermentation basin Calculate the SVI for the activated sludge treatment plant: 30min sett: 60min sett:
MLSSmg/l: MLVSSmg/l:74% - Precise Answer ✔✔185ml/g According to chapter 62-600.440(5) FAC regarding high level disinfection: any one sample shall not exceed how many fecal coliform values over a 30 day period? - Precise Answer ✔✔25 fecal coliform values per 100ml sample In the luxury uptake method of phosphorus removal organisms release phosphorus during which phase of treatment? - Precise Answer ✔✔Anaerobic phase Plant effluent coliform count fails to meet required standards for disinfection. chlorine residual is normal. Disinfection supplies are not a problem. What is the most probable cause? - Precise Answer ✔✔Contact time too short Using the breakpoint chlorination method of ammonia removal, approximately how many parts of chlorine are needed to remove one part of ammonia? - Precise Answer ✔✔10 parts Waste 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 70% volatile solids. What is the percent volatile solids reduction? - Precise Answer ✔✔30%
The availability of which element or compound will reduce the efficiency of the denitrification process? - Precise Answer ✔✔Free oxygen (O2) Which of the following suspended growth processes is not recommended for Nitrification? - Precise Answer ✔✔Contact stabilization Excessive dark sudsy foam is building on the surface of the stabilization tank of the contact stabilization process. What is the best method to correct the problem? - Precise Answer ✔✔Increase wasting FDEP chapter 62-610 FAC definition: "water that has received at least secondary treatment in basic disinfection and is reused after flowing out of a domestic wastewater treatment facility" describes what? - Precise Answer ✔✔Reclaimed water FDEP chapter 62-601 FAC: a composite sample shall be used for which test - Precise Answer ✔✔Effluent CBOD An overdose of Alam, when used as a filtration aid can be observed by the operator when? - Precise Answer ✔✔A cloudy appearance is noticed in the effluent of the filter Chlorine residual can be measured several ways, including the use of DPD reagent, spectrophotometers and iodometric titration.
What is another approved method? - Precise Answer ✔✔Amperometric titration Odor 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? - Precise Answer ✔✔Increase the sludge withdrawal from the primary clarifiers As denitrification occurs in the anoxic tank, what is the expected effect on the control parameters? - Precise Answer ✔✔Alk: increase pH: increase NH3: no change NO3: decrease In an activated sludge plant, if the DO in the aeration tank suddenly decreases and the aerators are not the problem, what is the most probable cause? - Precise Answer ✔✔Increased organic load Classic sludge bulking is occurring in the final clarifier of a conventional activated sludge plant. Indicators include solids pouring over the weirs, excessive straggler floc observed at the clarifier surface and a homogenous sludge blanket appearing throughout the clarifier. Sludge in settling test settles slowly leaving a cloudy supernatant.
FDEP chapter 62-6 00.440(4)(B) FAC, high level disinfection is described as: - Precise Answer ✔✔Total chlorine residual of 1.0 mg/L for 15 minutes at peak hourly flow Chapter 62-620, FAC, wastewater permitting: plant records must be maintained on site for how many years? - Precise Answer ✔✔3 years
