WASTEWATER PRACTICE EXAM 4 HIGH-YIELD
SLUDGE TREATMENT, FILTRATION, AND WATER
QUALITY CONTROL SUMMARY 2026
◉ FDEP chapter 62-600 FC, domestic wastewater facilities, states
that all treatment plants shall be____________
Answer: Fenced
◉ As the operator of a primary clarifier, you notice a black and
odorous septic wastewater leaving the clarifier. What is the probable
cause?
Answer: Improper sludge removal
◉ 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?
Answer: Pressurized water
◉ Chlorine gas is how many times heavier than air
Answer: 2.5
◉ The combination of methane and ____________ can be very
combustible
,Answer: Oxygen
◉ 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?
Answer: Contact time too short
◉ A fixed sample is:
Answer: A sample purposely spiked by the lab technician for QA/QC
◉ According to FDEP chapter 62-602 FAC, an operator could have
his license permanently revoked for:
Answer: Falsified or misrepresented reports, logs, or lab sheets
◉ What process do the bacteria perform in the stabilization(re-
aeration) tank in the contact stabilization process?
Answer: Absorption and digestion of the waste material they
collected
◉ 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?
Answer: 533 (6 x 10 x 8 = 480) (480 /27 = 17.7) (17.7 x 30 = 533)
, ◉ When properly adjusted, the rope packing on a centrifugal pump
is designed to leak how much?
Answer: One drip per second
◉ A confined space is defined as having a space large enough to
bodily enter and perform work, has limited entry and egress and is
___________?
Answer: Not designed for continuous occupancy
◉ You noticed that your bearings are excessively hot on a pump,
why?
Answer: Over lubrication
◉ Where can you gain access for collection system maintenance?
Answer: Man hole
◉ Low DO and nutrient deficiency will promote the growth of
_________?
Answer: Filamentous bacteria
◉ When charging a lead-acid type battery for a composite sampler,
what dangerous gas could be produced?
SLUDGE TREATMENT, FILTRATION, AND WATER
QUALITY CONTROL SUMMARY 2026
◉ FDEP chapter 62-600 FC, domestic wastewater facilities, states
that all treatment plants shall be____________
Answer: Fenced
◉ As the operator of a primary clarifier, you notice a black and
odorous septic wastewater leaving the clarifier. What is the probable
cause?
Answer: Improper sludge removal
◉ 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?
Answer: Pressurized water
◉ Chlorine gas is how many times heavier than air
Answer: 2.5
◉ The combination of methane and ____________ can be very
combustible
,Answer: Oxygen
◉ 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?
Answer: Contact time too short
◉ A fixed sample is:
Answer: A sample purposely spiked by the lab technician for QA/QC
◉ According to FDEP chapter 62-602 FAC, an operator could have
his license permanently revoked for:
Answer: Falsified or misrepresented reports, logs, or lab sheets
◉ What process do the bacteria perform in the stabilization(re-
aeration) tank in the contact stabilization process?
Answer: Absorption and digestion of the waste material they
collected
◉ 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?
Answer: 533 (6 x 10 x 8 = 480) (480 /27 = 17.7) (17.7 x 30 = 533)
, ◉ When properly adjusted, the rope packing on a centrifugal pump
is designed to leak how much?
Answer: One drip per second
◉ A confined space is defined as having a space large enough to
bodily enter and perform work, has limited entry and egress and is
___________?
Answer: Not designed for continuous occupancy
◉ You noticed that your bearings are excessively hot on a pump,
why?
Answer: Over lubrication
◉ Where can you gain access for collection system maintenance?
Answer: Man hole
◉ Low DO and nutrient deficiency will promote the growth of
_________?
Answer: Filamentous bacteria
◉ When charging a lead-acid type battery for a composite sampler,
what dangerous gas could be produced?
