WASTEWATER TEST EXAM SCRIPT
TESTED QUESTIONS VERIFIED
SOLUTIONS
◍ Most activated sludge mixed liquor suspended solids fall into a range
of what percent volatile content for municipal waste when the process is
operating properlv? 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 the 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 lbs and a cubic foot of water holds
7.48 gallons, how much does a cubic foot of water weight? Answer:62.4
, ◍ What is the best adiustment to make (from the list of possible
answers) if solids are rising in the secondary clarifier accompanied by
small as bubbles and solids that break apart when they surface?
Answer:Decrease aeration DO
◍ Is a high-rate aeration process typically overloaded or underloaded by
design? Answer:Overloaded
◍ What does the term aliquot mean? Answer:portion of a sample
◍ What is another term for inorganic solids? Answer:non-volatile
◍ What is the common preservation method for a wastewater sample to
be tested for CBOD5? Answer:Cool to 4° Celsius
◍ 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 dissolved oxygen 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%
TESTED QUESTIONS VERIFIED
SOLUTIONS
◍ Most activated sludge mixed liquor suspended solids fall into a range
of what percent volatile content for municipal waste when the process is
operating properlv? 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 the 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 lbs and a cubic foot of water holds
7.48 gallons, how much does a cubic foot of water weight? Answer:62.4
, ◍ What is the best adiustment to make (from the list of possible
answers) if solids are rising in the secondary clarifier accompanied by
small as bubbles and solids that break apart when they surface?
Answer:Decrease aeration DO
◍ Is a high-rate aeration process typically overloaded or underloaded by
design? Answer:Overloaded
◍ What does the term aliquot mean? Answer:portion of a sample
◍ What is another term for inorganic solids? Answer:non-volatile
◍ What is the common preservation method for a wastewater sample to
be tested for CBOD5? Answer:Cool to 4° Celsius
◍ 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 dissolved oxygen 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%
