Waste Water Operator Lv 1 Exam Prep Already Graded A+
0 view 0 purchase
Course
Wastewater
Institution
Wastewater
In the activated sludge process, some of the activated sludge must be wasted to...
A. Prevent excessive solid buildup
B. Prevent clogging of the sludge return line
C. Prevent overloading of sludge return pumps
D. Increase digester gas production A. Prevent excessive solid buildup
The best ...
Waste Water Operator Lv 1 Exam Prep
Already Graded A+
In the activated sludge process, some of the activated sludge must be wasted to...
A. Prevent excessive solid buildup
B. Prevent clogging of the sludge return line
C. Prevent overloading of sludge return pumps
D. Increase digester gas production ✔✔A. Prevent excessive solid buildup
The best operating strategy for feeding primary sludge to an anaerobic digester is to feed...
A. Several time a day
B. Large quantities once or twice a day
C. Once a day
D. When the volatile solids drop below 60% ✔✔A. Several time a day
Why is scum skimmed from the liquid surface of a primary settling tank?
,A. To reduce load on the digester
B. To eliminate interference with sludge removal
C. To allow aeration of the tank contents
D. To reduce odor and insect nuisance ✔✔B. To eliminate interference with sludge removal
Which of the following test would give the fastest indication of toxicity in an activated sludge
process?
A. Oxygen Uptake Rate (OUR)
B. Settleometer
C. MLSS
D. Microscopic Observation ✔✔A. Oxygen Uptake Rate (OUR)
Filamentous bulking of activated sludge may be controlled temporarily by...
A. Adding sodium chloride to the aeration tank
B. Spraying water on the aeration tank surface
C. Carefully chlorinating the return sludge and mixed liquor
, D. Aerating the final settling tank ✔✔C. Carefully chlorinating the return sludge and mixed
liquor
Since reaction rates are lower during the winter, the operator of an activated sludge plant will
usually...
A. Increase dissolved oxygen levels
B. Decrease MCRT
C. Decrease wasting
D. Increase MCRT ✔✔D. Increase MCRT
In a healthy activated sludge process which of the following organisms will most likely be found
in the greatest numbers?
A. Stalked Ciliates
B. Amoebas
C. Free swimming ciliates
D. Nymphs ✔✔A. Stalked Ciliates
The benefits of buying summaries with Stuvia:
Guaranteed quality through customer reviews
Stuvia customers have reviewed more than 700,000 summaries. This how you know that you are buying the best documents.
Quick and easy check-out
You can quickly pay through credit card or Stuvia-credit for the summaries. There is no membership needed.
Focus on what matters
Your fellow students write the study notes themselves, which is why the documents are always reliable and up-to-date. This ensures you quickly get to the core!
Frequently asked questions
What do I get when I buy this document?
You get a PDF, available immediately after your purchase. The purchased document is accessible anytime, anywhere and indefinitely through your profile.
Satisfaction guarantee: how does it work?
Our satisfaction guarantee ensures that you always find a study document that suits you well. You fill out a form, and our customer service team takes care of the rest.
Who am I buying these notes from?
Stuvia is a marketplace, so you are not buying this document from us, but from seller Layer. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for $17.99. You're not tied to anything after your purchase.
