Wastewater Practice Test (Florida)
English questions and answers
A chlorine residual of 0.5 mg/L for 15 minutes at peak hourly flow - correct answer
✔✔According to FDEP chapter 62-600.440 (4) (b) FAC, basic level disinfection is described as:
24hrs from discovery - correct answer ✔✔FDEP chapter 62-604.550 (a) FAC, requires a
wastewater spill shall be verbally reported to the state warning point no later than:
Never put rings of new packing over the old packing - correct answer ✔✔What is the 'rule of
thumb' regarding pump packing?
Effluent CBOD - correct answer ✔✔According to FDEP chapter 62-60, FAC, a composite sample
shall be used for which test?
Amperometric Titration - correct answer ✔✔Chlorine residual can be measured in several ways,
including the use of DPD reagent, spectrophotometers and iodometric titration. Which of the
following is also an approved method?
Dissolved Oxygen(DO) - correct answer ✔✔Chapter 62-601, Domestic wastewater treatment
plant monitoring, states that on-site tests for total residual chlorine, pH, and _______ can be
performed under the direction of a certified operator:
Positive displacement pump - correct answer ✔✔Starting this type of pump against a closed
valve can cause major damage to the pump, pump piping, the operator, or all three
Grab samples - correct answer ✔✔These types of samples may be used for CBOD5 and
nutrients at flows less than 100,000 GPD, according to chapter 62-601
,Any major interruption of service - correct answer ✔✔According to FDEP chapter 62-602,
drinking water and wastewater treatment plant operators, duties of operators includes
reporting to the permittee and the department, as soon as possible, but within 24hrs:
Debris caught in the impeller housing - correct answer ✔✔What could cause a centrifugal
above ground pump to be noisy while running
28th day - correct answer ✔✔According to FDEP chapter 62-601 FAC, Domestic wastewater
treatment plant monitoring, discharge monitoring reports (DMRs) for the previous month must
be submitted to the department by the ____________ day of the current month?
Fenced - correct answer ✔✔FDEP chapter 62-600 FC, domestic wastewater facilities, states that
all treatment plants shall be____________
Improper sludge removal - correct answer ✔✔As the operator of a primary clarifier, you notice
a black and odorous septic wastewater leaving the clarifier. What is the probable cause?
Pressurized water - correct answer ✔✔A fire has started in the maintenance shop due to an
ignition of petroleum oil. Which type of fire extinguisher should NOT be used to fight the fire?
2 - correct answer ✔✔Chlorine gas is how many times heavier than air
Oxygen - correct answer ✔✔The combination of methane and ____________ can be very
combustible
Contact time too short - correct answer ✔✔Plant effluent coliform count fails to meet the
required standards for disinfection. Chlorine residual is normal. Disinfectant supplies ARE NOT a
problem. What is the probable cause?
, A sample purposely spiked by the lab technician for QA/QC - correct answer ✔✔A fixed sample
is:
Falsified or misrepresented reports, logs, or lab sheets - correct answer ✔✔According to FDEP
chapter 62-602 FAC, an operator could have his license permanently revoked for:
Absorption and digestion of the waste material they collected - correct answer ✔✔What
process do the bacteria perform in the stabilization(re-aeration) tank in the contact stabilization
process?
533 (6 x 10 x 8 = 480) (480 /27 = 17.7) (17.7 x 30 = 533) - correct answer ✔✔A screenings
dumpster at the head works of the treatment plant is full at the end of the day. The dumpster is
6ft tall, 10ft long, and 8ft wide. How many cubic yards of screenings must be disposed of in a 30
day month?
One drip per second - correct answer ✔✔When properly adjusted, the rope packing on a
centrifugal pump is designed to leak how much?
Not designed for continuous occupancy - correct answer ✔✔A confined space is defined as
having a space large enough to bodily enter and perform work, has limited entry and egress and
is ___________?
Over lubrication - correct answer ✔✔You noticed that your bearings are excessively hot on a
pump, why?
Man hole - correct answer ✔✔Where can you gain access for collection system maintenance?
Filamentous bacteria - correct answer ✔✔Low DO and nutrient deficiency will promote the
growth of _________?
English questions and answers
A chlorine residual of 0.5 mg/L for 15 minutes at peak hourly flow - correct answer
✔✔According to FDEP chapter 62-600.440 (4) (b) FAC, basic level disinfection is described as:
24hrs from discovery - correct answer ✔✔FDEP chapter 62-604.550 (a) FAC, requires a
wastewater spill shall be verbally reported to the state warning point no later than:
Never put rings of new packing over the old packing - correct answer ✔✔What is the 'rule of
thumb' regarding pump packing?
Effluent CBOD - correct answer ✔✔According to FDEP chapter 62-60, FAC, a composite sample
shall be used for which test?
Amperometric Titration - correct answer ✔✔Chlorine residual can be measured in several ways,
including the use of DPD reagent, spectrophotometers and iodometric titration. Which of the
following is also an approved method?
Dissolved Oxygen(DO) - correct answer ✔✔Chapter 62-601, Domestic wastewater treatment
plant monitoring, states that on-site tests for total residual chlorine, pH, and _______ can be
performed under the direction of a certified operator:
Positive displacement pump - correct answer ✔✔Starting this type of pump against a closed
valve can cause major damage to the pump, pump piping, the operator, or all three
Grab samples - correct answer ✔✔These types of samples may be used for CBOD5 and
nutrients at flows less than 100,000 GPD, according to chapter 62-601
,Any major interruption of service - correct answer ✔✔According to FDEP chapter 62-602,
drinking water and wastewater treatment plant operators, duties of operators includes
reporting to the permittee and the department, as soon as possible, but within 24hrs:
Debris caught in the impeller housing - correct answer ✔✔What could cause a centrifugal
above ground pump to be noisy while running
28th day - correct answer ✔✔According to FDEP chapter 62-601 FAC, Domestic wastewater
treatment plant monitoring, discharge monitoring reports (DMRs) for the previous month must
be submitted to the department by the ____________ day of the current month?
Fenced - correct answer ✔✔FDEP chapter 62-600 FC, domestic wastewater facilities, states that
all treatment plants shall be____________
Improper sludge removal - correct answer ✔✔As the operator of a primary clarifier, you notice
a black and odorous septic wastewater leaving the clarifier. What is the probable cause?
Pressurized water - correct answer ✔✔A fire has started in the maintenance shop due to an
ignition of petroleum oil. Which type of fire extinguisher should NOT be used to fight the fire?
2 - correct answer ✔✔Chlorine gas is how many times heavier than air
Oxygen - correct answer ✔✔The combination of methane and ____________ can be very
combustible
Contact time too short - correct answer ✔✔Plant effluent coliform count fails to meet the
required standards for disinfection. Chlorine residual is normal. Disinfectant supplies ARE NOT a
problem. What is the probable cause?
, A sample purposely spiked by the lab technician for QA/QC - correct answer ✔✔A fixed sample
is:
Falsified or misrepresented reports, logs, or lab sheets - correct answer ✔✔According to FDEP
chapter 62-602 FAC, an operator could have his license permanently revoked for:
Absorption and digestion of the waste material they collected - correct answer ✔✔What
process do the bacteria perform in the stabilization(re-aeration) tank in the contact stabilization
process?
533 (6 x 10 x 8 = 480) (480 /27 = 17.7) (17.7 x 30 = 533) - correct answer ✔✔A screenings
dumpster at the head works of the treatment plant is full at the end of the day. The dumpster is
6ft tall, 10ft long, and 8ft wide. How many cubic yards of screenings must be disposed of in a 30
day month?
One drip per second - correct answer ✔✔When properly adjusted, the rope packing on a
centrifugal pump is designed to leak how much?
Not designed for continuous occupancy - correct answer ✔✔A confined space is defined as
having a space large enough to bodily enter and perform work, has limited entry and egress and
is ___________?
Over lubrication - correct answer ✔✔You noticed that your bearings are excessively hot on a
pump, why?
Man hole - correct answer ✔✔Where can you gain access for collection system maintenance?
Filamentous bacteria - correct answer ✔✔Low DO and nutrient deficiency will promote the
growth of _________?
