Wastewater III Study Exam Latest
Update Already Passed
First action for a polymer spill ✔✔Apply an absorbent to the spill such as sand or kitty litter and
then sweep up the materials.
Total discharge head includes ✔✔Discharge pressure head + static discharge head + Velocity
head (outlet) + Friction Head (discharge line)
Where is the best location to collect a sample? ✔✔A location that represents the entire waste
stream or basin.
What are the preservation and hold times for BOD samples? ✔✔48 hours at < or = to 6 degrees
C.
Define BOD. ✔✔The rate at which organisms use the oxygen in water or waste water while
stabilizing decomposeable organic matter under aerobic conditions.
What is the purpose of a dessicator? ✔✔To allow residual samples to control moisture prior to
weighing.
, What will happen if the flow to the grit chamber is too low? ✔✔Too much organic material will
be deposited.
How does an operator control the suspended solids in an activated sludge basin? ✔✔By wasting
and returning activated sludge.
Chlorine combines with ammonia to form what ✔✔Chloramines
What can the operator control with the activated sludge process? ✔✔Wasting and return rates.
What is the best way to control filamentous bacteria? ✔✔Addition of chlorine to the (RAS.)
Called return on some tests.
A 5.2 acre lagoon with an in-fluent of 47000 gallons per day is dropped 3 inches a day from a
depth of 5 feet to a depth of 2 feet. How many gallons are discharged each day? ✔✔470,577
gallons per day (exact problem)
Update Already Passed
First action for a polymer spill ✔✔Apply an absorbent to the spill such as sand or kitty litter and
then sweep up the materials.
Total discharge head includes ✔✔Discharge pressure head + static discharge head + Velocity
head (outlet) + Friction Head (discharge line)
Where is the best location to collect a sample? ✔✔A location that represents the entire waste
stream or basin.
What are the preservation and hold times for BOD samples? ✔✔48 hours at < or = to 6 degrees
C.
Define BOD. ✔✔The rate at which organisms use the oxygen in water or waste water while
stabilizing decomposeable organic matter under aerobic conditions.
What is the purpose of a dessicator? ✔✔To allow residual samples to control moisture prior to
weighing.
, What will happen if the flow to the grit chamber is too low? ✔✔Too much organic material will
be deposited.
How does an operator control the suspended solids in an activated sludge basin? ✔✔By wasting
and returning activated sludge.
Chlorine combines with ammonia to form what ✔✔Chloramines
What can the operator control with the activated sludge process? ✔✔Wasting and return rates.
What is the best way to control filamentous bacteria? ✔✔Addition of chlorine to the (RAS.)
Called return on some tests.
A 5.2 acre lagoon with an in-fluent of 47000 gallons per day is dropped 3 inches a day from a
depth of 5 feet to a depth of 2 feet. How many gallons are discharged each day? ✔✔470,577
gallons per day (exact problem)
