Exam (elaborations)
AWWA Lab Analyst 1 Questions and Answers 100% Solved
- Course
- Institution
Exam of 12 pages for the course AWWA at AWWA (AWWA Lab Analyst 1)
[Show more]
Content preview
AWWA Lab Analyst 1When determining the true color of a sample, the sample must first be treated to remove
turbidity? - answerThey must filter prior for true color.
Turbidity is measured using...? - answerNephelometric Turbidity Unit (NTU)
What are the reporting units for conductivity? - answeruS/cm or ohm/cm (there is a
conversion)
At a minimum, how many calibration standards should be used when analysis is
initiated? - answer3
What are significant figures? - answerEach of the digits of a number that are used to
express it to the required degree of accuracy, starting from the first nonzero digit.
How many significant digits are in the value 75.3? - answer3
How many significant digits are in the number 0.9000? - answer4
What is another name for soda ash? - answerSodium Carbonate
What is another name for caustic soda? - answersodium hydroxide
What are the quality control checks for an analytical run? - answer1. LCS, MB, DUP,
MS, MSD aka Positive, negative control, and duplicate
How should acids in glass containers be transported? - answerThey should be
transported in a rubber or plastic container.
What is total hardness? - answerMagnesium and Calcium
What is a grab sample? - answerA single sample at a single location
How should all chemicals be stored? - answerPer manufacturer
What type of balance is accurate? - answerAnalytical Balance
What is the meniscus? - answerCurved surface of liquid
If you combine 0.01mg of manganese into a 200mL sample, what is the concentration?
- answer1. Move decimal three places and divide by 200mL. 10mg/200mL= 0.05mg/L
, What happens to the pH value as the hydrogen ion increases? - answerTenfold (lower
pH) For every 1 point the pH changes by a factor of 10, so when pH drops the hydrogen
ions increase 10x.
What is the MPN method? - answer1. Most Probable Number. Method of estimating the
number of viable microorganisms in a product.
What is another name for sodium hydroxide? - answerCaustic soda
When performing a 2-point pH calibration, the standards chosen should ________ the
expected range of your sample. - answerBracket
What is used to sterilize broth for total coliform? - answerTemperature is used to
sterilize broth for the total coliform.
A linear calibration curve requires at least how many points? - answer3
Results of coliform membrane filter tests expressed? - answerColonies per 100mL
What does a spectrophotometer measure? - answerAbsorbance and wavelength
What titrant is used for alkalinity? - answerSulfuric acid (0.02N)
Coliform bacteria are used as? - answerIndicator
TSS Filter - answer2.0 micron fiber glass filter
When a membrane filter count shows 43 coliform colonies and 1.00mL of sample was
filtered, what is the correct number of coliform per 100mL? - answer4300
The titrant used in amperometric titration for chlorine residual is? - answerPhenylarsine
oxide
The most accurately measure 100mL of solution is? - answerVolumetric
What is the solids concentration of 8% sludge? - answer80,000
Potable water is the water which is usable for drinking and sanitary purposes. It has a
total dissolved solids content of around - answer150ppm
What is a burette used for? - answerTo dispense known amounts of liquids
The filter's pore size is measured in _______? - answerMicron
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 julianah420. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for $15.99. You're not tied to anything after your purchase.
Can Stuvia be trusted?
4.6 stars on Google & Trustpilot (+1000 reviews)
67163 documents were sold in the last 30 days
Founded in 2010, the go-to place to buy study notes for 14 years now