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Florida Wastewater Exam|| ACTUAL EXAM COMPLETE
QUESTIONS AND CORRECT DETAILED ANSWERS
WITH RATIONALES (VERIFIED ANSWERS) |ALREADY
GRADED A+||LATEST EXAM!!!
What growth phase is an aerobic digester operated in? -
ANSWER-Endogenous respiration
If excessive pressure builds up in a chlorine tank due to
excessive heat, what will prevent explosions? - ANSWER-
Fusible plug
You notice 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 growth of
what? - ANSWER-Filamentous bacteria
Chlorine leaks can be detected by? - ANSWER-Ammonia
solution with Q-Tip
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What takes places in the stabilization tank in a contact
stabilization plant? - ANSWER-Absorption
Why is an aerobic digester covered? - ANSWER-Protect
from cold weather
Which of the following would you not use a grab sample
on? - ANSWER-BOD
Staffing is based on what? - ANSWER-Flow and type of
treatment
What condition does an operator have the least amount of
control over? - ANSWER-Temp
Why would you chlorinate a RAS line? - ANSWER-Control
filamentous bacteria
What is the most common type of pond? - ANSWER-
Facultative
Denitrification will cause what? - ANSWER-Rising sludge
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What type of ponds are used after a trickling filter,
activated sludge, or RBC plant? - ANSWER-Polishing
pond
Convert 27°C to Fahrenheit - ANSWER-80.6°F
You have excessive billowing white sudsy foam on the
surface of your aerator. What is the cause? - ANSWER-
F/M too high
If you have a sudden increase of BOD by 50% or a BOD
>400. What is this termed? - ANSWER-Increased organic
load
Coliform bacteria are used for what? - ANSWER-
Indicators of possible presence of pathogenic organisms
Where does the effluent from the aerator go? - ANSWER-
Secondary clarifier
A decrease in temperature will have what effect on
disinfection? - ANSWER-Require longer contact time
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CL2 combined with ammonia forms what? - ANSWER-
Chloramines
At what pH would disinfection be at its greatest? -
ANSWER-5
It can be said that the lower the __________ , the greater
the ________ - ANSWER-pH ; Disinfection
What is the distance between manholes? - ANSWER-300-
500ft
What is the best range of parameters for the Activated
Sludge Process? - ANSWER-2ppm DO, pH 7.0, 80-95°F
What is the breakdown of nitrate to nitrogen gas called? -
ANSWER-Denitrification
What 2 stages are in an anaerobic digester? - ANSWER-
Acid formation and Gas formation
What is the benefit of step feed aeration? - ANSWER-
Treat higher flows in less space
Florida Wastewater Exam|| ACTUAL EXAM COMPLETE
QUESTIONS AND CORRECT DETAILED ANSWERS
WITH RATIONALES (VERIFIED ANSWERS) |ALREADY
GRADED A+||LATEST EXAM!!!
What growth phase is an aerobic digester operated in? -
ANSWER-Endogenous respiration
If excessive pressure builds up in a chlorine tank due to
excessive heat, what will prevent explosions? - ANSWER-
Fusible plug
You notice 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 growth of
what? - ANSWER-Filamentous bacteria
Chlorine leaks can be detected by? - ANSWER-Ammonia
solution with Q-Tip
,2|Page
What takes places in the stabilization tank in a contact
stabilization plant? - ANSWER-Absorption
Why is an aerobic digester covered? - ANSWER-Protect
from cold weather
Which of the following would you not use a grab sample
on? - ANSWER-BOD
Staffing is based on what? - ANSWER-Flow and type of
treatment
What condition does an operator have the least amount of
control over? - ANSWER-Temp
Why would you chlorinate a RAS line? - ANSWER-Control
filamentous bacteria
What is the most common type of pond? - ANSWER-
Facultative
Denitrification will cause what? - ANSWER-Rising sludge
,3|Page
What type of ponds are used after a trickling filter,
activated sludge, or RBC plant? - ANSWER-Polishing
pond
Convert 27°C to Fahrenheit - ANSWER-80.6°F
You have excessive billowing white sudsy foam on the
surface of your aerator. What is the cause? - ANSWER-
F/M too high
If you have a sudden increase of BOD by 50% or a BOD
>400. What is this termed? - ANSWER-Increased organic
load
Coliform bacteria are used for what? - ANSWER-
Indicators of possible presence of pathogenic organisms
Where does the effluent from the aerator go? - ANSWER-
Secondary clarifier
A decrease in temperature will have what effect on
disinfection? - ANSWER-Require longer contact time
, 4|Page
CL2 combined with ammonia forms what? - ANSWER-
Chloramines
At what pH would disinfection be at its greatest? -
ANSWER-5
It can be said that the lower the __________ , the greater
the ________ - ANSWER-pH ; Disinfection
What is the distance between manholes? - ANSWER-300-
500ft
What is the best range of parameters for the Activated
Sludge Process? - ANSWER-2ppm DO, pH 7.0, 80-95°F
What is the breakdown of nitrate to nitrogen gas called? -
ANSWER-Denitrification
What 2 stages are in an anaerobic digester? - ANSWER-
Acid formation and Gas formation
What is the benefit of step feed aeration? - ANSWER-
Treat higher flows in less space
