Written by students who passed Immediately available after payment Read online or as PDF Wrong document? Swap it for free 4.6 TrustPilot
logo-home
Previously searched by you
Previously searched by you
logo
  • WASTE WATER CLASS B
  • WASTE WATER CLASS B
To add items to your wishlist, you must be logged in
Document preview thumbnail
Preview 2 out of 10 pages
Exam (elaborations)

WASTEWATER CLASS 2 MULTIPLE CHOICE QUESTIONS AND CORRECT ANSWERS

0.0
(0 reviews)
- sold
10 pages
2025/2026 Written for academic year
Institution WASTE WATER CLASS B
Course WASTE WATER CLASS B
Document preview thumbnail
Preview 2 out of 10 pages

WASTEWATER CLASS 2 MULTIPLE CHOICE QUESTIONS AND CORRECT ANSWERS

Content preview

WASTEWATER CLASS 2 MULTIPLE
CHOICE QUESTIONS AND CORRECT
ANSWERS

TheA2threaholdA2limitA2valueA2concentrationA2forA2chlorineA2vapourA2is:
a.A20.1A2ppm
b.A20.3A2ppm
c.A20.5A2ppm
d.A21.0A2ppmA2-A2Ans--c.A20.5ppm

WhenA2workingA2inA2confinedA2spacesA2whereA2flammableA2gasesmayA2beA2present,A2us
eA2onlyA2toolsA2madeA2of:
a.A2stainlessA2steel
b.A2lead
c.A2iron
d.A2aA2non-sparkingA2alloyA2-A2Ans--d.A2aA2non-sparkingA2alloy

InA2additionA2toA2theA2workerA2enteringA2aA2confinedA2space,A2whatA2isA2thwA2minimumA2n
umberA2ofA2peopleA2requiredA2toA2beA2presentA2duringA2aA2confinedA2spaceA2entry?
a.A21
b.A22
c.A23
d.A24A2-A2Ans--a.A21

HearingA2protectionA2mustA2beA2madeA2availableA2toA2allA2employeesA2exposedA2toA2nois
eA2levelsA2above:
a.A285A2dbA2averagedA2overA28A2workingA2hours
b.A2850A2dbA2averagedA2overA28A2workingA2hours
c.A285A2dbA2continuouslyA2forA28A2workingA2hours
d.A285A2dbA2atA2anyA2pointA2inA2theA28A2hourA2workdayA2-A2Ans--
a.A285A2dbA2averagedA2overA28A2workingA2hours

RecommendedA2hygieneA2practicesA2toA2minimizeA2theA2riskA2ifA2beingA2infectedA2byA2wa
stewaterA2pathogensA2include:
a.A2onlyA2rubbingA2yourA2eyesA2whileA2workingA2ifA2youA2areA2wearingA2imperviousA2glove
s
b.A2washingA2yourA2handsA2beforeA2theA2beginningA2ofA2yourA2shift
c.A2changingA2outA2yourA2workA2clothesA2andA2showeringA2beforeA2leavingA2work
d.A2readingA2theA2materialA2safetyA2dataA2sheetsA2forA2allA2chemicalsA2usedA2inA2theA2plan
tA2-A2Ans--
c.A2changingA2outA2yourA2workA2clothesA2andA2showeringA2beforeA2leavingA2work

, theA2BODA2loadingA2rateA2dividedA2byA2theA2quantityA2ofA2microorganismsA2presentA2inA2t
heA2biologicalA2reactorA2(aerationA2tanks)A2isA2knownA2as:
a.A2organicA2loading
b.A2toxicity
c.A2hydraulicA2loading
d.A2foodA2toA2microorganismA2ratioA2-A2Ans--d.A2foodA2toA2microorganismA2ratio

TheA2foodA2toA2microorganismA2ratioA2isA2theA2ratioA2ofA2theA2massA2ofA2organicA2loadingA2
toA2theA2massA2ofA2microorganismsA2inA2theA2biologicalA2reactors

whiteA2fluffyA2foamA2onA2theA2biologicalA2reactorsA2inA2anA2activatedA2sludgeA2processA2isA
2usuallyA2causedA2by:
a.A2insufficientA2biomassA2toA2treatA2theA2incomingA2wasteA2
B.A2LowA2bA2oA2dA2
C.A2highA2doA2
D.A2TooA2littleA2sludgeA2beingA2wasteA2fromA2processA2-A2Ans--
a.A2insufficientA2biomassA2toA2treatA2theA2incomingA2wasteA2
StiffA2whiteA2foamA2typicallyA2indicatesA2thatA2thereA2areA2tooA2fewA2microorganismsA2inA2t
heA2systemA2toA2treatA2theA2incomingA2waste.A2ThisA2shortageA2canA2beA2causedA2byA2sta
rt-
upA2conditions,A2excessiveA2wasting,A2toxicA2materialsA2inA2theA2influent,A2lowA2doA2orA2ot
herA2conditionsA2harmfulA2toA2theA2microorganismA2population.

typicalA2componentsA2ofA2gritA2removalA2systemsA2include:
a.A2beltA2pressesA2
b.A2comminutorsA2
CA2chainA2andA2flightsA2scrapersA2
DA2BarA2racksA2-A2Ans--C.A2chainA2andA2flightA2scrapers
theA2componentsA2ofA2aA2greatA2removalA2systemA2willA2dependA2onA2theA2typeA2usedA2at
A2yourA2facility.A2TheA2componentsA2ofA2theA2commonlyA2usedA2equipmentA2includeA2chai
nA2andA2slightA2scrapersA2bucketA2elevatorsA2gripA2screwsA2airA2compressorsA2andA2pum
psA2/A2Airlift.

commonA2settlingA2timesA2inA2primaryA2clarifiersA2-A2Ans--2-3A2hours

whatA2couldA2beA2theA2problemA2whenA2aA2centrifugalA2pumpA2isA2notA2deliveringA2sufficie
ntA2capacity?A2-A2Ans--theA2suctionA2lineA2hasA2beenA2setA2upA2incorrectly

whatA2isA2theA2reasonA2thatA2wouldA2causeA2aA2pumpA2toA2notA2deliverA2liquidA2atA2all?A2-
A2Ans--pumpA2isA2notA2primedA2orA2hasA2lostvotsA2prime


duringA2morningA2checksA2youA2noticeA2tahtA2theA2bearingsA2inA2theA2pumpA2areA2running
A2hot.A2whatA2canA2causeA2this?A2-A2Ans--theA2bearingsA2areA2overA2lubricated


overA2timeA2youA2haveA2noticedA2thatA2thwA2packingA2inA2aA2pumpA2requiresA2frequentA2re
placement.A2whatA2canA2beA2theA2cause?A2-A2Ans--thereA2isA2insufficientA2seal

Document information

Uploaded on
February 15, 2026
Number of pages
10
Written in
2025/2026
Type
Exam (elaborations)
Contains
Questions & answers
Report Copyright Violation
$12.99
Wrong document? Swap it for free Within 14 days of purchase and before downloading, you can choose a different document. You can simply spend the amount again.
Written by students who passed
Immediately available after payment
Read online or as PDF
Seller avatar
LECTUREKIM
1.0
(2)
Sold
12
Followers
0
Items
3990
Last sold
1 week ago

Browse related subjects

Subjects

  • wastewater class 2 multiple choice questions and c

Why students choose Stuvia

Created by fellow students, verified by reviews

Quality you can trust: written by students who passed their tests and reviewed by others who've used these notes.

Didn't get what you expected? Choose another document

No worries! You can instantly pick a different document that better fits what you're looking for.

Pay as you like, start learning right away

No subscription, no commitments. Pay the way you're used to via credit card and download your PDF document instantly.

Student with book image

“Bought, downloaded, and aced it. It really can be that simple.”

Alisha Student

Working on your references?

Create accurate citations in APA, MLA and Harvard with our free citation generator.

Learn more Create citation
Working on your references?

Frequently asked questions