CWEA Collection Systems Maintenance Exam Questions With Verified Answers.
7 views 0 purchase
Course
CWEA
Institution
CWEA
CWEA Collection Systems Maintenance
Exam Questions With Verified Answers.
Why are gasoline and volatile solvents objectionable when present in a sewer? - answerThey produce
an explosion hazard
You should never attempt to install, maintain, repair or replace electrical equipment panels, controls...
CWEA Collection Systems Maintenance
Exam Questions With Verified Answers.
Why are gasoline and volatile solvents objectionable when present in a sewer? - answer✔They produce
an explosion hazard
You should never attempt to install, maintain, repair or replace electrical equipment panels, controls,
wiring or circuits unless - answer✔You know what you are doing, are qualified and are authorized
What are the different areas of traffic zones? - answer✔Advance Warning Area, Transition Area, Activity
Area (buffer space and work space), Termination Area. Could be 4 or 5, justify your answer on the test!
why should hydrogen sulfide be controlled? - answer✔to protect from corrosion and odors
Personnel entering a Permit Required Confined Space must have the following training - answer✔entry
and rescue
To find protective gear before application of a product, you should: - answer✔look at the MSDS
The gas most commonly associated with septic wastewater is - answer✔Hydrogen Sulfide
The lack of an unpleasant odor in a manhole, lift station or other structures does not always mean that
dangerous gases are not present because: - answer✔some dangerous gasses are odorless (for example,
carbon monoxide)
What are the four conditions necessary to create an explosion? - answer✔combustible gas, adequate
oxygen, heat and proper mixing of gas and oxygen
what does the "transition area" mean in traffic control? - answer✔It moves traffic out of its normal path
what elements should be considered to improve worker safety in High speed Temporary Traffic control
Zones? - answer✔Rerouting traffic around the work site, positioning of law enforcement officers in the
temporary traffic control zone, and work zone training
What key features would you need to address when developing an S.O.P. for a Lift Station failure? -
answer✔Traffic Control Plan, By-Pass connections, and Spill containment
What tools are used with a power rodder? - answer✔Spring Blades
Tools used for sewer rodding include: - answer✔porcupine, root saw, square bar cork screw
What tool would you use to cut VCP pipe? - answer✔Chain Pipe Cutter
Which conditions should a gas detection device test for? - answer✔Hydrogen sulfide,
explosive/flammable gases, oxygen
What does "LEL" mean on a gas detection meter? - answer✔Lower Explosive Limit
The oxygen level alarm normally goes off if oxygen levels are below: - answer✔19.5 percent
When developing an S.O.P. for scheduled maintenance of electrical equipment, what program should be
addressed as a primary safety guideline? - answer✔The L.O.T.O Program
What does L.O.T.O. Stand for? - answer✔Lock out tag out
What document would you require to be referenced when developing an S.O.p. for hazardous substace
spill clean up? - answer✔M.S.D.S.
in developing an S.O.P. for air monitoring in a Permit Required Confined Space you would include what
two factors? - answer✔Placement of the blower and a weather forecast
According to the State Water Resources Control Board Order No. 2006-003-DWQ, each enrollee must
develop and implement a system-specific: - answer✔SSMP (Sewer System Management Plan)
How long do you have to report a category 1 SSO? - answer✔2 hours
To report in the Statewide SSO Data-base California Integrated Water Quality System (CIWQS) regarding
the location of a Category 2 SSO, how must you report the location? - answer✔Using the GPS
coordinates
Biological activity in long, sluggish-flow, flat grade sewer lines will likely cause: - answer✔odors
Flatter sewer line grades may cause added sewer maintenance expense and odor nuisance. This is
caused by what? - answer✔A decrease in velocity which allows organic and inorganic solids to settle out.
This, in turn, allows biological activity to happen which corrodes the pipe and releases hydrogen sulfide
(H2S) which smells like rotten eggs
Clear water in entering a collection system is called what? - answer✔infiltration
Infiltration can occur in a pipe when the pipe is: - answer✔cracked, broken, fractures, has roots coming
into it etc.
The main reason we add sodium hypochlorite to sewers is to control: - answer✔BOD
Roots can enter collection systems through: - answer✔cracked pipes, broken pipes, fractured pipes
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 Thebright. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for $11.49. You're not tied to anything after your purchase.