Exam (elaborations)
Grade 4 Water Treatment Exam Prep|118 Questions and Answers
- Course
- Institution
Grade 4 Water Treatment Exam Prep|118 Questions and Answers
[Show more]
Seller
Follow
Victorious23
Reviews received
Content preview
Grade 4 Water Treatment ExamPrep|118 Questions and Answers
In a pumping station where two complete pumping units are provided, how
much should a pump be capable of delivering?
a.) Average Flow
b.) Maximum Flow
c.) 1/2 the average flow
d.) 1/2 maximum flow - -A
-When there is insufficient alkalinity present in water to react with the
coagulant, alkalinity should be supplied by
a.) Adding Lime
b.) Adding Turbidity
c.) Reducing plant flow
d.) Removing carbon dioxide - -A
-Chlorine dioxide is generated on-site by the reaction of chlorine with what
chemical?
a.) Oxygen
b.) Sodium Chlorite
c.) Salt Brine
d.) Carbon - -B
-Why is carbon dioxide primarily used in the stabilization process?
a.) Decrease pH
b.) Increase pH
c.) Tie up scale forming ions
d.) Form a protective coating - -A
-If fluoride is fed ahead of filtration what can occur?
a.) Some fluoride loss
b.) Problems with disinfection
c.) Increases in fluoride concentration
d.) Formation of precipitate - -A
-Which of the following emergency leak repair kits should be on hand for ton
cylinders?
,a.) Emergency Kit A
b.) Emergency Kit B
c.) Emergency Kit C
d.) Emergency Kit D - -B
-What will iron that remains in the ferrous state do?
a.) Be removed by filters
b.) Pass through the filters
c.) Precipitate in the reaction tank
d.) Settle out - -B
-Short circuiting in the flocculation process can be corrected by
a.) Adjusting the pH
b.) Decreasing the flows
c.) Increasing coagulant dosages
d.) Providing several compartments in series - -D
-What removes organic substances from depleted activated carbon?
a.) Degasification
b.) Recarbonation
c.) Reduction
d.) Reactivation - -D
-What is the purpose of an anti-siphon valve on a fluoride metering pump?
a.) The same as that of the overflow connection on the supply
b.) To prevent fluoridated water from being siphoned into the feed
equipment
c.) To prevent potential overfeed of fluoride
d.) The same as that of a vacuum breaker on the potable makeup water line
- -B
-A perfectly uniform sand would have a uniformity coefficient of
a.) 0
b.) 1
c.) 1.5
d.) 1.7 - -C
-When handling any dry fluoride compound one important safety precaution
that should be observed is to
a.) Have another operator near by
, b.) Keep all windows closed to prevent the escape of dangerous dusts into
the environment
c.) Keep skin contact with fluoride dusts to a minimum
d.) Use only explosion proof fixtures - -C
-What calcium carbonate condition should be maintained for a good calcium
carbonate coating in piping?
a.) Undersaturated
b.) Just saturated
c.) Oversaturated
d.) That which is indicated by the corrosion indices - -B
-The free chlorine residual in the water entering the distribution system
cannot be less than what level for more than 4 hours?
a.) 0.1 mg/L
b.) 0.2 mg/L
c.) 1.0 mg/L
d.) 2.o mg/L - -B
-All community public water systems serving more than 50 service
connections and which have their own source of water are required to install,
operate, and maintain _____________ disinfection equipment.
a.) Duplicate
b.) Quadruple
c.) Single
d.) Triplicate - -A
-Which of the following should be done to a filter bed at least once a year?
a.) Take out of service
b.) Replace
c.) Restratify
d.) Probe for gravel displacement - -D
-What is the purpose of the underdrain of a filter?
a.) Regulate the filtration rate and backwash rate of the filter
b.) Remove giardia and crypto that pass through the filter media
c.) Collect filtered water and distribute backwash water evenly
d.) Prevent the formation of mudballs in the filter - -C
-What depth of anthracite must dual media high rate filtration filters
maintain in the filter beds?
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 Victorious23. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for $16.49. You're not tied to anything after your purchase.
Can Stuvia be trusted?
4.6 stars on Google & Trustpilot (+1000 reviews)
83637 documents were sold in the last 30 days
Founded in 2010, the go-to place to buy study notes for 14 years now