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 WSO Water Treatment Grade 2 Textbook - Chapter Study Questions with Correct Answers CA$24.42   Add to cart
Quickly navigate to
Preview
  2.  
  3. AWWA
  4.  
  5. AWWA

Exam (elaborations)

AWWA WSO Water Treatment Grade 2 Textbook - Chapter Study Questions with Correct Answers
 5 views  0 purchase
  • Course
  • AWWA
  • Institution
  • AWWA

AWWA WSO Water Treatment Grade 2 Textbook - Chapter Study Questions with Correct Answers Molarity is the number of moles of solute per liter of solution 3 multiple choice options CaCO3 is the _____ of calcium carbonate. chemical formula 3 multiple choice options The first step in...

[Show more]

Preview 3 out of 16  pages

Document information

  • September 13, 2024
  • 16
  • 2024/2025
  • Exam (elaborations)
  • Questions & answers

Subjects

  • awwa wso water treatment grade 2 textbook chapte
  • molarity is the number of moles of solute per lite
  • the first step in calculating percent by weight of
  • what term refers to the number of equivalent we

Written for

  • AWWA
  • AWWA

Seller

avatar-seller
julianah420

Reviews received

Content preview

AWWA WSO Water Treatment Grade 2
Textbook - Chapter Study Questions
with Correct Answers

Molarity is the number of - answer moles of solute per liter of solution

CaCO3 is the _____ of calcium carbonate. - answer chemical formula

The first step in calculating percent by weight of an element in a compound is to
determine the - answer molecular weight

What term refers to the number of equivalent weights of solute per liter of solution? -
answer normality

A solution consists of two parts: a solvent and a - answer solute

The chemical formula for calcium hydroxide (lime) is Ca(OH)2. Determine the number of
atoms of each element in a molecule of the compound. - answerCa; 1 atoms O; 2 atoms
H; 2 atoms

The equation of the reaction between calcium carbonate (CaCO3) and carbonic acid
(H2CO3) is shown. If 10 lb of H2CO3 is used in the reaction, how many pounds of
CaCO3 will react with the H2CO3? - answer16.1 lb of CaCO3

You need to prepare 25 gal of a solution with 2. percent strength. Assume the solution
will have the same density as water: 8.34 lb/gal. How many pounds of chemical will you
need to dissolve in the water? - answer5.21 lb of chemical

How much water should be added to 80 ml of a 2.5N solution of H2CO3 to obtain a
1.8N solution of H2CO3? - answer31.11 mL

How many atoms of oxygen are present in Ca(HCO3)2? - answer6

Find the detention time in hours for a clarifier that has an inner diameter of 112.2 ft and
a water depth of 10.33 ft if the flow rate is 7.26 mgd. - answer2.52 hr

A chemical metering pump is pumping 26.3 gal/day. How many mL/min is this? -
answer69.1 mL/min

A water treatment plant has an emergency shutdown. How many water supply hours
are left in a 119.8-ft diameter tank given the following data?

,Tank's water level = 27.6 ft
Water cannot go below 16.0 ft at any time to comply with fire control
Water usage averages 483 gmp - answer33.7 hr

How many lb/day of sodium fluorosilicate (Na2SiF6) is required given the following
parameters?
Flow rate is 1,750 gpm.
Fluoride desired is 1.20 mg/L
Fluoride in raw water is 0.15 mg/L
Sodium fluorosilicate is 98.1% pure.
Fluoride (F) ion percent is 60.6% - answer37 lb/day, F

A filter is 24 ft by 28 ft. Calculate the filtration rate in gpm, if it receives a flow of 3,250
gpm. - answer4.8 gpm/ft2

Pressure measured in terms of the height of water (in meters or feet) is referred to as -
answerhead

In the equation to convert milligrams-per-liter concentration to pounds per day, (dosage)
(flow rate)(conversion factor) = - answerfeed rate

In the volume formula, how is volume calculated? - answerarea of surface x third
dimension

What is the formula for calculating the area of a circle? - answer(.785)(D2)

If a spherical tank is 20 ft in diameter, what is its capacity? - answer4,187 ft3

Water being served to the public for a population greater than 3,300 must not have a
disinfectant residual entering the distribution system below ___ for more than 4 hours. -
answer0.2 mg/L

What is the action level for copper? - answer1.3 mg/L

Where are the sampling point(s) located for required sampling of turbidity in a
community water system? - answerAt the point(s) where water enters the distribution
system, including all filter effluents of a surface water treatment plant.

Under the Surface Water Treatment Rule, disinfection residuals must be collected at the
same location in the distribution system as - answercoliform samples

What is the MCL for haloacetic acids (HAA5)? - answer0.060 mg/L

An example of _____ is determining the lowest monthly average during 12-month
monitoring of Giardia and virus inactivation. - answerbenchmarking

, What is the MCLG for substances that are suspected carcinogens? - answerZero

Which regulation is designed to limit human exposure to harmful organisms, including
Cryptosporidium, by promoting achievement of particle and turbidity removal targets for
surface water treatment systems? - answerIESWTR (Interim Enhanced Surface Water
Treatment Rule)

Which regulation is designed to reduce the risk of exposure to fecal contamination that
may be present in public water systems that use ground-water sources? - answerGWR
(Ground Water Rule)

Which regulation is designed to promote routine surveillance of distribution system
water quality to search for contamination from fecal matter and/or disease causing
bacteria? - answerTCR (Total Coliform Rule)

What is the optimal pH range for the removal of particulate matter when using alum as a
coagulant? - answer6.5 to 7.2

Which forces will pull particles together once they have been destabilized in the
coagulation-flocculation process? - answervan der Walls forces

Which of the following is a common mistake that operators make in regards to
flocculation units? - answerAllowing excessive flocculation time

Ferric sulfate has which advantage over aluminum sulfate (alum)? - answerMore dense
floc

The lower the _____, the more difficult it is to form a proper floc. - answerturbidity

Jar test results are expressed in - answermilligrams per liter

List four characteristics of raw water that must be considered in selecting a treatment
chemical. - answerAny four of the following; type and concentration of contaminants,
temperature, alkalinity, pH, turbidity, color, total organic carbon.

Raw-water temperature that approaches the freezing point has what effect on
coagulation and flocculation processes? - answerAs the water temperature decreases,
the viscosity of the water increases (denser), which slows the rate of floc settling.

How much time is required to develop heavy floc particles during the flocculation
process? - answer30 minutes

If enteric disease-causing protozoans have been found in the effluent of a water plant
which is the most probable solution? - answerUse a multibarrier approach--coagulation,
flocculation, sedimentation, and filtration

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 CA$24.42. You're not tied to anything after your purchase.

Can Stuvia be trusted?

4.6 stars on Google & Trustpilot (+1000 reviews)

73216 documents were sold in the last 30 days

Founded in 2010, the go-to place to buy study notes for 14 years now

Start selling
CA$24.42
  • (0)
  Add to cart