Wastewater collections and Treatment Exam Quizzes
& 100% Correct Answers
Based on the Ten States Standards, what is the average flow rate for a wastewater system
in gal/capita/day
a. 100
b. 150
c. 200
d. 300
a
the well-aerated mixture of wastewater and sludge is known as ___
mixed liquor
The manholes are a source of inflow and infiltration, increasing the volume of wastewater
to be carried, as well as the size of pipes and lift/pumping stations, and ultimately,
increasing costs. true or false
true. inflow tends to peak during precipitation events and causes greater flow variation than
infiltration
the pounds formula can be used to calculate the amount of a parameter in lbs/day for all
except which of the following?
a. bod5
b. suspended solids
c. dissolved oxygen
d. chlorine
, c. DO is measured in a lab
what is the definition of tapered aeration?
it is the oxygen supply to match the demand along tank length
The most common form of chemical disinfection is ____
chlorination
A primary clarifier removes pollutants that float or settle, typcially 30% to 40% of
suspended solids and 60-70% of BOD5. true or false?
false. 60-70% removal of TSS, 30-40% of BOD5
the design of a combined sewer overflow storage sedimentation basin is similar to that of a
wastewater treatment plant's grit chamber. true or false
false. it is similar to a sedimentation tank
what is the recommended overflow rate (gal/day-ft2) for a primary clarifier?
a. 800-1200
b. 2000-3000
c. 5000-6000
d 8000-10000
a
the two broad categories of collection systems are gravity and force main. true or false?
true
& 100% Correct Answers
Based on the Ten States Standards, what is the average flow rate for a wastewater system
in gal/capita/day
a. 100
b. 150
c. 200
d. 300
a
the well-aerated mixture of wastewater and sludge is known as ___
mixed liquor
The manholes are a source of inflow and infiltration, increasing the volume of wastewater
to be carried, as well as the size of pipes and lift/pumping stations, and ultimately,
increasing costs. true or false
true. inflow tends to peak during precipitation events and causes greater flow variation than
infiltration
the pounds formula can be used to calculate the amount of a parameter in lbs/day for all
except which of the following?
a. bod5
b. suspended solids
c. dissolved oxygen
d. chlorine
, c. DO is measured in a lab
what is the definition of tapered aeration?
it is the oxygen supply to match the demand along tank length
The most common form of chemical disinfection is ____
chlorination
A primary clarifier removes pollutants that float or settle, typcially 30% to 40% of
suspended solids and 60-70% of BOD5. true or false?
false. 60-70% removal of TSS, 30-40% of BOD5
the design of a combined sewer overflow storage sedimentation basin is similar to that of a
wastewater treatment plant's grit chamber. true or false
false. it is similar to a sedimentation tank
what is the recommended overflow rate (gal/day-ft2) for a primary clarifier?
a. 800-1200
b. 2000-3000
c. 5000-6000
d 8000-10000
a
the two broad categories of collection systems are gravity and force main. true or false?
true
