WASTEWATER
WASTEWATER EXAM QUESTIONS AND ANSWERS
GRADED A+ !!
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
4/12= 0.33
43560 x 0.33= 14.374.8
14.374.8 x 7.48= 107,523.5
107,523.5 x 20= 2,150,460
2,150,460/700,000= 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 the DO
a
What is another term for organic solids? Answer >> Volatile
, WASTEWATER
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 adjustment 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 under loaded 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
WASTEWATER EXAM QUESTIONS AND ANSWERS
GRADED A+ !!
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
4/12= 0.33
43560 x 0.33= 14.374.8
14.374.8 x 7.48= 107,523.5
107,523.5 x 20= 2,150,460
2,150,460/700,000= 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 the DO
a
What is another term for organic solids? Answer >> Volatile
, WASTEWATER
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 adjustment 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 under loaded 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
