1|Page
WASTEWATER TEST (FLORIDA) NEWEST 2025
COMPLETE EXAM| 200 REAL EXAM QUESTIONS
AND VERIFIED ANSWERS (100% CORRECT)
ALREADY GRADED A+| NEW!!
When charging a lead-acid type battery for a composite sampler, what
dangerous gas could be produced? - ANSWER - Hydrogen
What is the best method in dealing with a chemical spill? - ANSWER -
Contain and clean up
There is septic wastewater entering your primary clarifier. What is the
problem? - ANSWER - Anaerobic conditions in the collection systems
Which of the following substances is highly viscous and very slippery? -
ANSWER - Polymer
If you pump green sludge to a drying bed what chemical should be
applied? - ANSWER - Lime
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: -
ANSWER - Add the acid slowly to the dilution water
pg. 1
,2|Page
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? - ANSWER -
4.2 mg/L
Solids are washing out of the secondary clarifier of the activated sludge
plant. Plant personnel increase the Return Activated Sludge flow rate,
which slows the problem temporarily, but gets worse after 30 minutes.
What is the cause of the plant problem? - ANSWER - Increasing the
RAS decreased the detention time in the clarifier
The chlorine residual is falling, and 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
to: - ANSWER - Place a second chlorine cylinder online
The ash content in lab procedures is the same as? - ANSWER -
Inorganic solids
Denitrification will cause what? - ANSWER - Rising sludge
If a 220 volt, 3 phase motor is running backwards, what should you do?
- ANSWER - Switch the two leads
Coliform count fails to meet standards. Your chlorine supply is not the
problem. What is? - ANSWER - Short circuiting and low contact time
pg. 2
, 3|Page
What type of material should be used for transporting samples? -
ANSWER - Polyethylene
How does temperature effect disinfection? - ANSWER - Higher the
temp, the better the disinfection
The advantage of an anaerobic digester over an aerobic digester is? -
ANSWER - Decreased power consumption
How long should you wait after you make a process change before
making another change? - ANSWER - 1 week
The settleometer settles fairly slowly. You have shiny dark foam of the
surface of the aerator. What is the problem? - ANSWER - MCRT too
high
The removal of nitrogen and phosphorus are? - ANSWER - Advanced
secondary treatment
What would cause a pump to fail to discharge? - ANSWER - Suction lift
too high
Chlorine is not coming out. Another cylinder is hooked up with the same
problem. What is the problem? - ANSWER - Manifold line is clogged
pg. 3
WASTEWATER TEST (FLORIDA) NEWEST 2025
COMPLETE EXAM| 200 REAL EXAM QUESTIONS
AND VERIFIED ANSWERS (100% CORRECT)
ALREADY GRADED A+| NEW!!
When charging a lead-acid type battery for a composite sampler, what
dangerous gas could be produced? - ANSWER - Hydrogen
What is the best method in dealing with a chemical spill? - ANSWER -
Contain and clean up
There is septic wastewater entering your primary clarifier. What is the
problem? - ANSWER - Anaerobic conditions in the collection systems
Which of the following substances is highly viscous and very slippery? -
ANSWER - Polymer
If you pump green sludge to a drying bed what chemical should be
applied? - ANSWER - Lime
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: -
ANSWER - Add the acid slowly to the dilution water
pg. 1
,2|Page
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? - ANSWER -
4.2 mg/L
Solids are washing out of the secondary clarifier of the activated sludge
plant. Plant personnel increase the Return Activated Sludge flow rate,
which slows the problem temporarily, but gets worse after 30 minutes.
What is the cause of the plant problem? - ANSWER - Increasing the
RAS decreased the detention time in the clarifier
The chlorine residual is falling, and 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
to: - ANSWER - Place a second chlorine cylinder online
The ash content in lab procedures is the same as? - ANSWER -
Inorganic solids
Denitrification will cause what? - ANSWER - Rising sludge
If a 220 volt, 3 phase motor is running backwards, what should you do?
- ANSWER - Switch the two leads
Coliform count fails to meet standards. Your chlorine supply is not the
problem. What is? - ANSWER - Short circuiting and low contact time
pg. 2
, 3|Page
What type of material should be used for transporting samples? -
ANSWER - Polyethylene
How does temperature effect disinfection? - ANSWER - Higher the
temp, the better the disinfection
The advantage of an anaerobic digester over an aerobic digester is? -
ANSWER - Decreased power consumption
How long should you wait after you make a process change before
making another change? - ANSWER - 1 week
The settleometer settles fairly slowly. You have shiny dark foam of the
surface of the aerator. What is the problem? - ANSWER - MCRT too
high
The removal of nitrogen and phosphorus are? - ANSWER - Advanced
secondary treatment
What would cause a pump to fail to discharge? - ANSWER - Suction lift
too high
Chlorine is not coming out. Another cylinder is hooked up with the same
problem. What is the problem? - ANSWER - Manifold line is clogged
pg. 3
