Question 1
What is the predominant organism in a healthy Activated Sludge Treatment Plant?
CORRECT ANSWER
Stalked ciliates
Question 2
A composite sample must be?
CORRECT ANSWER
Representative and Sub-samples time spaced over 15 minutes apart
Question 3
What is the standard volume for a BOD sample bottle?
CORRECT ANSWER
300ml
Question 4
If you have a lime slurry feed line, what is the best valve to use?
CORRECT ANSWER
Plug valve
1
@THE STUDY VAULT
,Question 5
If you notice a predominance of rotifers in your activated sludge sample while looking at it
under a microscope, what does this indicate?
CORRECT ANSWER
Old Sludge
Question 6
If your activated sludge plant begins to nitrify, what conditions would you expect to
decrease?
CORRECT ANSWER
Settling in the clarifiers
Question 7
Calculate the BOD given the information:
Initial DO: 8.3
Final DO: 5.9
Milliliters of sample used: 2
CORRECT ANSWER
360mg/l
Question 8
How do you calibrate a chemical feed pump?
CORRECT ANSWER
2
@THE STUDY VAULT
, By measuring the pump output
Question 9
What is the chemical formula for sulfuric acid?
CORRECT ANSWER
H2SO4
Question 10
What is the most common type of Activated Sludge package plants?
CORRECT ANSWER
extended aeration
Question 11
What is the most appropriate method of reducing the F:M Ratio?
CORRECT ANSWER
Increase wasting
Question 12
An operator notices a portion of the aeration tank with large bubbles rising up. What is
the most likely problem?
CORRECT ANSWER
Unequal air distribution caused by a blown diffuser
3
@THE STUDY VAULT
What is the predominant organism in a healthy Activated Sludge Treatment Plant?
CORRECT ANSWER
Stalked ciliates
Question 2
A composite sample must be?
CORRECT ANSWER
Representative and Sub-samples time spaced over 15 minutes apart
Question 3
What is the standard volume for a BOD sample bottle?
CORRECT ANSWER
300ml
Question 4
If you have a lime slurry feed line, what is the best valve to use?
CORRECT ANSWER
Plug valve
1
@THE STUDY VAULT
,Question 5
If you notice a predominance of rotifers in your activated sludge sample while looking at it
under a microscope, what does this indicate?
CORRECT ANSWER
Old Sludge
Question 6
If your activated sludge plant begins to nitrify, what conditions would you expect to
decrease?
CORRECT ANSWER
Settling in the clarifiers
Question 7
Calculate the BOD given the information:
Initial DO: 8.3
Final DO: 5.9
Milliliters of sample used: 2
CORRECT ANSWER
360mg/l
Question 8
How do you calibrate a chemical feed pump?
CORRECT ANSWER
2
@THE STUDY VAULT
, By measuring the pump output
Question 9
What is the chemical formula for sulfuric acid?
CORRECT ANSWER
H2SO4
Question 10
What is the most common type of Activated Sludge package plants?
CORRECT ANSWER
extended aeration
Question 11
What is the most appropriate method of reducing the F:M Ratio?
CORRECT ANSWER
Increase wasting
Question 12
An operator notices a portion of the aeration tank with large bubbles rising up. What is
the most likely problem?
CORRECT ANSWER
Unequal air distribution caused by a blown diffuser
3
@THE STUDY VAULT
