Exam (elaborations)
2024 WATER OPERATOR - 200 PRACTICE EXAM QUESTIONS WITH CORRECT ANSWERS
- Course
- Institution
2024 WATER OPERATOR - 200 PRACTICE EXAM QUESTIONS WITH CORRECT ANSWERS
[Show more]
Content preview
2024 WATER OPERATOR - 200PRACTICE EXAM QUESTIONS WITH
CORRECT ANSWERS
in certain costal areas, intrusion of sea water in to groundwater basin is most
commonly caused by? - CORRECT-ANSWERSover pumping from the ground
basin
noncarbonate hardness can only be reduces by the following processes: -
CORRECT-ANSWERSna2co3, ion exchange, membrane separation, and naoh.
selective carbonate removal is: - CORRECT-ANSWERSremoval lf calcium
bicarbonate hardness at 9.6 Ph
noncarbonate hardness is present in water when: - CORRECT-ANSWERStotal
hardness is greater than total alkalinity
ion exchange softening will remove: - CORRECT-ANSWERSnoncarbonate
hardness
the following constituents cause non carbonate hardness: - CORRECT-
ANSWERScaso4, cacl2, mgcl2, mgo4, and srso4
selective carbonate removal is: - CORRECT-ANSWERSremoval of calcium
bicarbonate hardness at Ph 9.6
selective carbonate removal is: - CORRECT-ANSWERSremoval of calcium
bicarbonate hardness at Ph 9.6
the softening process samples indicate the following data: t alk:90, p alk: 40.
Treatment parameters call for a treatment range of +2 to +5 hydroxide
alkalinity. the achieve this the: - CORRECT-ANSWERSlime feed should be
increased.
na2co3 hardness is present in water when: - CORRECT-ANSWERSthe total
alkalinity is greater than the total hardness
ion exchange will NOT reduce: - CORRECT-ANSWERSthe tds of water
, with ion exchange, the exchange capacity is based on: - CORRECT-
ANSWERSvolume and type of media
the capacity of synthetic ion exchange is lessened when: - CORRECT-
ANSWERSmg hardness is in excess of one half of the ca hardness.
slaking lime produces: - CORRECT-ANSWERScalcium hydroxide
selective carbonate hardness removal requires the use of: - CORRECT-
ANSWERSlime
you are operating a lime softening plant where magnesium removal is
necessary. The process includes lime addition, recarbonation, and filtration.
To maintain the quality of treatment and reduce operation cost, you should: -
CORRECT-ANSWERSeliminate recarbonation and use split treatment to lower
the Ph and save on lime
you are operation a lime softening plant which produces a finished water
with a total hardness of 80 mg/l as caco3 and a langlier index of +0.6. The
problem here is: - CORRECT-ANSWERSthe finished water will be scale
forming. excessive calcium carbonate caused this problem
recarbonation is necessary after lime softening in order to : - CORRECT-
ANSWERSreduce the scale forming tendencies of supersaturated water
in split treatment, a portion of the water, about 90%, is treated with an
excess amount of lime to remove __________ at a ph of over ______ -
CORRECT-ANSWERSmagnesium / 11
if the finished water from an ion exchange unit has a salty taste to it, a
probable cause for the problem may be: - CORRECT-ANSWERSthe rinse stage
was unsuccessful.
the primary cause of resin breakdown in the exchange softening process is :
- CORRECT-ANSWERSthe presence of high chlorine residual
__________________ is used to remove noncarbonate hardness in chemical
precipitation. - CORRECT-ANSWERSsodium carbonate
in ion exchange softening, if iron in the form of ferric is found in the water,
the unit will: - CORRECT-ANSWERSact as a filter
in ion exchange a high chlorine residual will: - CORRECT-ANSWERSdamage
the resin
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 Elitaa. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for $14.99. You're not tied to anything after your purchase.
Can Stuvia be trusted?
4.6 stars on Google & Trustpilot (+1000 reviews)
72042 documents were sold in the last 30 days
Founded in 2010, the go-to place to buy study notes for 14 years now