100% satisfaction guarantee Immediately available after payment Both online and in PDF No strings attached
logo-home
Previously searched by you
Previously searched by you
logo
AWWA Operator Certification Study Guide 4thED. - Water Treatment Sample Test 3 Questions and Answers $17.49
Add to cart
Quickly navigate to
Preview
  2.  
  3. AWWA
  4.  
  5. AWWA

Exam (elaborations)

AWWA Operator Certification Study Guide 4thED. - Water Treatment Sample Test 3 Questions and Answers
 0 purchase
  • Course
  • AWWA
  • Institution
  • AWWA

AWWA Operator Certification Study Guide 4thED. - Water Treatment Sample Test 3 Questions and Answers The concentration of chlorine that is immediately dangerous to health and life (IDHL) is _____ parts per million. 30ppm The common rate of operation of a rapid sand filter is considered to ...

[Show more]

Preview 2 out of 6  pages

Document information

  • September 13, 2024
  • 6
  • 2024/2025
  • Exam (elaborations)
  • Questions & answers

Subjects

  • awwa operator certification study guide 4thed w
  • the concentration of chlorine that is immediately
  • an operator inspects valves to determine that they
  • a 2 foot wide rectangular channel is flowing 18 i

Written for

  • AWWA
  • AWWA

Seller

avatar-seller
julianah420

Reviews received

Content preview

AWWA Operator Certification Study
Guide 4thED. - Water Treatment Sample
Test 3 Questions and Answers

The concentration of chlorine that is immediately dangerous to health and life (IDHL) is
_____ parts per million. - answer30ppm

The common rate of operation of a rapid sand filter is considered to be _____ gallons
per square foot per minute. - answer2 to 6

An operator inspects valves to determine that they are holding properly by... - answera
pressure test

Trihalomethane (THM) precursors are _____ compounds. - answernatural organic

How many gallons does 1,000 feet of 15-inch diameter pipe contain? - answer9,175

Chemicals that may be used for corrosion control in water treatment are; -
answerphosphate compounds, sodium bicarbonate, calcium hydroxide, and sodium
carbonate

A 2-foot wide rectangular channel is flowing 18 inches deep with an average velocity of
5 feet per second. The rate of flow is approximately _____ cubic feet per second. -
answer15

A dosage of 17.1 mg/L coagulant applied to water in a plant of 1,000 gallons per minute
capacity and operating over a 10-hour period will require a total of _____ pounds of
coagulant. - answer85.5

Three most commonly used coagulants in water treatment are; - answeraluminum
sulfate, ferric chloride, and ferrous sulfate

An employer must have a Process Safety Plan if the plant has the capability of storing
at least _____ pounds of chlorine. - answer1,500

A high heterotrophic plate count (HPC) in water samples; - answercan mask detection
of coliforms

How many pounds of polymer are required to make up 750 gallons of 0.25 percent
polymer solution? - answer15.6 (pounds per gallon formula)

, Potassium permanganate is applied in water treatment for... - answera regenerant and
oxidant

In order for a chemical to function satisfactorily as a coagulant, it must... - answerreact
with the alkalinity in the water causing floc formations

CT is defined as... - answerThe product of residual disinfectant concentration and
contact time of the disinfectant with the water.

The function of the filter underdrains is best described as... - answercollection of treated
water and distribution of backwash

The C factor, or carrying capacity of pipelines, is often reduced by... -
answertuberculation

Which is an example of an acute violation? - answera positive sample for total coliforms
when E. coli are present.

An odorous gas produced by anaerobic decomposition is... - answerhydrogen sulfide

The USEPA's stance on point-of-use (POU) devices and bottled water is; - answer1.
POU devices and bottled water cannot be used to meet MCL's
2. POU devices and bottled water may be required as a condition of a variance or
exemption
3. POU devices and bottled water are not best available technology (BAT)

One of the most common causes of mud balls in the filter media is... - answerinsufficient
backwash rate

Which is the most effective compound for controlling algae growth? - answercopper
sulfate

The source of contamination by two suspected carcinogens, acrylamide, and
epichlorohydrin, is... - answerpolymer coagulants

Activated carbon is widely used for taste-and-odor control because it... - answerhas
absorptive properties

Greensand is often used as a filter medium for water with high... - answermanganese
concetrations

A circular clarifier treats a flow of 1.2 million gallons per day. The diameter is 55 feet;
the depth is 8 feet. What is the surface loading? - answer505 gallons per day per
square foot

The benefits of buying summaries with Stuvia:

Guaranteed quality through customer reviews

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

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

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 julianah420. Stuvia facilitates payment to the seller.

Will I be stuck with a subscription?

No, you only buy these notes for $17.49. You're not tied to anything after your purchase.

Can Stuvia be trusted?

4.6 stars on Google & Trustpilot (+1000 reviews)

67479 documents were sold in the last 30 days

Founded in 2010, the go-to place to buy study notes for 15 years now

Start selling
$17.49
  • (0)
Add to cart
Added