FLORIDA WASTEWATER FINAL EXAM
2 VERSIONS 2025/2026 BANK
COMPLETE 550 QUESTIONS WITH
DETAILED VERIFIED ANSWERS (100%
CORRECT ANSWERS) /ALREADY
GRADED A+ // BRAND NEW!!
A colored dye solution is added into the raw wastewater
entering a primary settling tank. The dye color was
noticeable in the effluent in 15 minutes and all of the color
had passed through the tank in 40 minutes. What does this
indicate? - ....ANSWER...Wastewater is passing through
the tank too quickly for effective settling
A spray field has a total of 80 acres and is divided into four
equal zones. Only one zone may be operated at a time and
the permit states that no more than 4 inches of water can
be applied to the zone. How long can a zone be operated at
a rate of 0.7 MGD before it must be rotated to another
zone? - ....ANSWER...3.1 days
,Most activated sludge mixed-liquor suspended solids fall
into a range of what percent volatile content for municipal
waste when the process is operating properly? -
....ANSWER...70 to 80%
What may be the first corrective action taken to resolve
floating sludge conditions in a secondary clarifier, given
these observations: SVI is 132; microscopic exam reveals
abundance of filamentous organisms -
....ANSWER...Increase DO
What is another term for organic solids? -
....ANSWER...Volatile
Which repair kit is designed for use with 150-pound
chlorine cylinders? - ....ANSWER..."A" kit
If a gallon of water weighs 8.34 pounds and a cubic foot of
water holds 7.48 gallons, how much does a cubic foot of
water weight? - ....ANSWER...62.4 pounds
,What is the best adjustment to make if solids are rising in
the secondary clarifier accompanied by small gas bubbles
and solids that break apart when they surface? -
....ANSWER...Decrease aeration DO
Is a high rate aeration process typically overloaded or
under loaded by design? - ....ANSWER...Overloaded
What does the term aliquot mean? - ....ANSWER...A
portion of a sample
What is another term for inorganic solids? -
....ANSWER...Non-volatile
What is a common preservation method for a wastewater
sample to be tested for CBOD5? - ....ANSWER...Cool to 4°
C
In which form are nutrients better utilized by
microorganisms in a biological treatment process? -
....ANSWER...Soluble
, Which of the following best describe the term anoxic? -
....ANSWER...Nearly anaerobic; very low DO but nitrates
and/or nitrites are present
What is the typical RAS-to-Q ratio for an extended
aeration activated sludge process? - ....ANSWER...75 to
100%
Which adjustment will create an increase contact time in
the aeration tank? - ....ANSWER...Decrease the RAS rate
What adjustment will help if solids are rising in the
secondary clarifier accompanied by a large septic gas
bubbles? - ....ANSWER...Increase RAS rate
What happens to the activity rate of activated sludge
microorganisms as the wastewater temperature increases
by 10°C? - ....ANSWER...It doubles
Which term is most related to vector attraction reduction
in an anaerobic digester? - ....ANSWER...SOUR
2 VERSIONS 2025/2026 BANK
COMPLETE 550 QUESTIONS WITH
DETAILED VERIFIED ANSWERS (100%
CORRECT ANSWERS) /ALREADY
GRADED A+ // BRAND NEW!!
A colored dye solution is added into the raw wastewater
entering a primary settling tank. The dye color was
noticeable in the effluent in 15 minutes and all of the color
had passed through the tank in 40 minutes. What does this
indicate? - ....ANSWER...Wastewater is passing through
the tank too quickly for effective settling
A spray field has a total of 80 acres and is divided into four
equal zones. Only one zone may be operated at a time and
the permit states that no more than 4 inches of water can
be applied to the zone. How long can a zone be operated at
a rate of 0.7 MGD before it must be rotated to another
zone? - ....ANSWER...3.1 days
,Most activated sludge mixed-liquor suspended solids fall
into a range of what percent volatile content for municipal
waste when the process is operating properly? -
....ANSWER...70 to 80%
What may be the first corrective action taken to resolve
floating sludge conditions in a secondary clarifier, given
these observations: SVI is 132; microscopic exam reveals
abundance of filamentous organisms -
....ANSWER...Increase DO
What is another term for organic solids? -
....ANSWER...Volatile
Which repair kit is designed for use with 150-pound
chlorine cylinders? - ....ANSWER..."A" kit
If a gallon of water weighs 8.34 pounds and a cubic foot of
water holds 7.48 gallons, how much does a cubic foot of
water weight? - ....ANSWER...62.4 pounds
,What is the best adjustment to make if solids are rising in
the secondary clarifier accompanied by small gas bubbles
and solids that break apart when they surface? -
....ANSWER...Decrease aeration DO
Is a high rate aeration process typically overloaded or
under loaded by design? - ....ANSWER...Overloaded
What does the term aliquot mean? - ....ANSWER...A
portion of a sample
What is another term for inorganic solids? -
....ANSWER...Non-volatile
What is a common preservation method for a wastewater
sample to be tested for CBOD5? - ....ANSWER...Cool to 4°
C
In which form are nutrients better utilized by
microorganisms in a biological treatment process? -
....ANSWER...Soluble
, Which of the following best describe the term anoxic? -
....ANSWER...Nearly anaerobic; very low DO but nitrates
and/or nitrites are present
What is the typical RAS-to-Q ratio for an extended
aeration activated sludge process? - ....ANSWER...75 to
100%
Which adjustment will create an increase contact time in
the aeration tank? - ....ANSWER...Decrease the RAS rate
What adjustment will help if solids are rising in the
secondary clarifier accompanied by a large septic gas
bubbles? - ....ANSWER...Increase RAS rate
What happens to the activity rate of activated sludge
microorganisms as the wastewater temperature increases
by 10°C? - ....ANSWER...It doubles
Which term is most related to vector attraction reduction
in an anaerobic digester? - ....ANSWER...SOUR
