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OIT sample test Questions and correct Answers 2024/2025
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OIT sample test Questions and correct Answers 2024/2025
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OIT sample test Questions and correctAnswers 2024/2025
"head"sinshydraulicssystemss-scorrectsanswers--
heightsorsenergysofswatersabovesasspecifiedspoint
**astotalschlorinesdosagesofs6.9smg/Lsissrequiredsforsdisinfection,sifstheseffluentsflowsiss1170
0sm3/dsandstheshypochloritesusedshass65%savailableschlorineshowsmanyskg/dsofshypochlori
tesissrequireds-scorrectsanswers--124skg/d
**reviewingsallsaspectssofstheswastewaterstreatmentsplantstosdetermineswhatswouldsoccursd
uringsvariousstypessofsemergencyssituationssissknownsassas........s-scorrectsanswers--
vulnerabilitysassessment
**whatscanscausesover-heatingsofsmechanicalsequipments-scorrectsanswers--over-
greasing
**Whatsissthesmainssourcesofsleadsandscoppersinsdrinkingswaters-scorrectsanswers--
corrosionsofsleadsandscoppersinsplumbingsmaterials
**whatspartsofsasconcretespipesinsasgravityssewersissmostsvulnerablestoscorrosionsstemmings
fromstheseffectssofssepticswastewaters-scorrectsanswers--crown
1skPasraisesswaters-scorrectsanswers--10.2scm
2500sL/secsissequalstoswhatsinsm3/secs-scorrectsanswers--2.5
4"spipescanscarrys________________sofswatersassas2"spipes(assumingssameswatersvelocity
sandspressure)s-scorrectsanswers--samesvolume
asdiseasesthatscansbestransmittedsthroughsdomesticswastewaters-scorrectsanswers--
hepatitis
astreatmentsplantsremovess97.4%sBODsfromswastewater.sIfsBODsenteringsiss305smg/L,swh
atswillsthesBODsinswastewatersbesleavings-scorrectsanswers--7.9smg/L
aftersusingsashydrant,stheshydrantsshouldsbes-scorrectsanswers--
closedsslowlystosreducessurges
afterswatermainsinstalledsorsrepairedsandsbeforesreconnectedstosdistributionssystemswhatsi
ssdonestosensurescustomerssafetys-scorrectsanswers--
watermainsshouldsbessuperschlorinated
, anysspaceswhereshazardoussgasscansaccumulatesorsansoxygensdeficientsatmospherescans
occurs-scorrectsanswers--confinedsspace
chemicalsfeederswillsfeedsatsmaxsratesofs900skgspersdayswhatsissitsinskg/mins-
scorrectsanswers--0.63
chlorinesdosagesiss3.8smg/L,schlorinesdemandsiss4.0smg/L,swhatsisstheschlorinesresiduals-
scorrectsanswers--0smg/L
chlorinesisssometimessaddedstoswatersbecausesitsissasstrongsoxidizer,swhatsdoessthissmeans
-scorrectsanswers--chlorineswillsbreaksdownsthesorganicsmaterialsinswater
coursesofsactionsofsescolisissdetectedsinsassamples-scorrectsanswers--
notifysthesministrysofsthesenvironment,smedicalsofficersofshealth,sincreasestheschlorinesdoses
andsflushsthessystem
examplesofscrosssconnections-scorrectsanswers--
connectionsbetweensboilersandsdomesticswatersline
firefighterssuseswaterscausingswaterspressurestosdrop,swhatscouldsitscauses-
scorrectsanswers--watershammersduestoswaterssurges
greasesusedstoslubricatesplantsequipmentsshouldsbes-scorrectsanswers--
shouldsbesthessamesgradesorsexactsequivalentsassrecommendedsbysthesequipmentsmanufa
cturer
Howsisswaterspressurizedsinsaspositivesdisplacementspumps-scorrectsanswers--
watersisspushedsbysasscrew,spiston,sgearsorsdiaphragm
ifsas"boilswatersorder"sissgivensbysashealthsunitsinsansemergencyssituation,showsshouldscusto
mersdisinfectstheswaters-scorrectsanswers--boilstheswatersvigorouslysfors5smin
ins8shourssasliftsstationspumpeds2000sL/minsandsnexts16shourss6500sL/min.sIfsliftsstationsserv
ess11000speople,swhatsissthesdailysperscapitasproductionsofssewages-scorrectsanswers--
773sL/d
Increasedsinteriorspipesroughnesssincreasessorsdecreasessthescarryingscapacitysofsthespip
es-scorrectsanswers--decreases
mainsreasonswetswellssforspumpssposessafetyshazards-scorrectsanswers--
subjectstoscollectionstoxicsgases
mostscommonscausesofssewerscorrosions-scorrectsanswers--hydrogenssulphide
mostscommonspumpsinspumpsstations-scorrectsanswers--centrifugal
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