pg. 1 Florida Wastewater License Test 2025 Prep Test Bank with 200 Questions and Correct Verified Answers| FL Wastewater Exam 2025 Prep | Florida Wastewater Operator Test 2025 (Brand New!)
What happens to the chlorine residual when the organic content in the effluent goes up?The residual goes down What are the principal nutrients that must be removed from effluent before it is safe for discharge to Florida water?Nitrogen and Phosphorus What is the dosage of chlorine, in mg/L, if the flow being treated is 85,000 GPD and 3 pounds of chlorine are used per day?
4.2 mg/L Upon arriving at the package treatment plant serving a small community, you find a uniform sludge blanket rising throughout the clarifier. A settleability test reveals a very slow-settling sludge, leaving a clear supernatant. MLSS test results are normal, but a calculation of the SVI shows high sludge volume index. What is the most likely cause of the high sludge blanket?Filamentous bacteria are causing the slow settling There is septic wastewater entering your primary clarifier. What is the problem?
- Aerobic conditions in the collections system
- Lift station pumps operating on short cycles
- Anaerobic conditions in the collections systems
- High flows due to a low MCRT
- Anaerobic condition in the collections system
Which of the following substances is highly viscous and very slippery?
- Calcium hypochlorite 1 / 4
pg. 2
- Calcium oxide
- Potassium permanganate
- Polymer
- Polymer
If you pump green sludge to a drying bed what chemical should be applied?
- Polymer
- Lime
- Cl2
- Alum
- Lime
The advantage of an anaerobic digester over an aerobic digester is?
- Less solids
- Increased power consumption
- Decrease power consumption
- Easier to operate
- Decrease power consumption
How long should you wait after you make a process change before making another change?
- 7 hours
- 10 days
- When the operator thinks it's necessary
- 1 week
- 1 week
When Chlorine is combined with water what type of pipe should be used?
- Ductile iron
- Asbestos concrete
C. PVC
- Carbon Steel
C. PVC 2 / 4
pg. 3 In 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 acid slowly to the dilution water A good settling sludge would consist of what type of protozoa?
- Rotifers and nematodes
- Amoebas and Flagellates
- Stalked ciliates and mastagoria
- Free swimmers and stalk ciliates
- Free swimmers and stalk ciliates
What is Phenolphylein used for in titration
- Oxidizer
- Indicator
- Acid reducer to lower pH
- Applicator
- Indicator
Your plant has an influent of 220 BOD and 163 TSS, and an effluent of 10 BOD, and 6 TSS. What is the BOD removal efficiency in your plant?
A. 92%
B. 94%
C. 95%
D. 96%
C. 95%
You suspect your anaerobic digester is going sour. What is the best way to verify its condition?
- pH
- Foam type
- VA/ALK ratio
- DO
- VA/ALK ratio 3 / 4
pg. 4 Before operating any piece of equipment what should be done?
- Lock out Tag out (remember, safety first!)
- Read O & M manual
- Read manufacturers manual
- Notify supervisor
- Read manufacturers manual
Detritus is noticed in your grit channel. What is the problem?
- Velocity too fast with short D/T
- Velocity too low with long D/T
- Short circuiting
- Density currents
- Velocity too low with long D/T
What is considered normal operation of an aerobic digester?
- Fill react
- Skim off foam when needed
- Settle and Decant as needed
- Feed only during low flow or constant when the sun is out
- Settle and Decant as needed
A plant with a flow of 1 MGD should be monitored
- Continuously
- Intermittently
- Daily
- Every four hours depending on surface load
- Continuously
What do total solids consist of?
- Dissolved and settleable
- Floatable and settlable
- / 4