CLASS D BASIC WATER PRACTICE
TEST QUESTIONS AND CORRECT
ANSWERS
AA2trenchA224inA2wideA2800ftA2longA2andA24ftA2deepA2isA2toA2beA2excavated.A2TheA2amoun
tA2ofA2soilA2excavatedA2is?A2-A2Ans--6400ft
AnA2elevatedA2storageA2tankA2hadA2pipeA2150A2feetA2aboveA2groundA2whenA2fullA2waterA2p
ressureA2atA2theA2bottomA2psiA2shouldA2be?A2-A2Ans--65
ChlorineA2dosageA2forA2waterA2isA22.7mg/
lA2ifA2chlorineA2residualA2afterA230A2minutesA2isA20.8mg/
l.A2WhatA2isA2demandA2expressedA2inA2mg/l?A2-A2Ans--1.9
WaterA2isA2pumpedA2250A2gallonsA2aA2min.A2HowA2longA2toA2fillA2100,000A2gallonA2tank?
A2-A2Ans--6.6
AA2freeA2chlorineA2residualA2ofA20.6mg/
lA2isA2desiredA2howA2manyA2mg/
lA2ofA2chlorineA2willA2beA2neededA2whenA2chlorineA2demandA2ofA2waterA2isA22.2mn/l?A2-
A2Ans--1.6
AA2chlorineA2dosageA2ofA22mg/
lA2isA2toA2beA2addedA2toA2600,000A2gallonsA2ofA2waterA2howA2manyA2poundsA2ofA2chlorineA
2100%A2areA2neededA2toA2obtainA2thisA2concentration?A2-A2Ans--10
TheA2hydrologicA2cycleA2is?A2-A2Ans--
RecyclingA2ofA2waterA2betweenA2theA2earthA2&A2atmosphere
BasicA2waterA2PHA2readingA2is?A2-A2Ans--8.5
AA2chemicalA2ofA2waterA2impactingA2scalingA2is?A2-A2Ans--Calcium
WhatA2isA2RawA2water?A2-A2Ans--UntreatedA2water
RegulatedA2chemicalA2compoundA2formedA2whenA2disinfectantsA2reactA2withA2naturallyA2o
ccurringA2organicA2matter?A2-A2Ans--ByA2productsA2THM/HAA
DiseasesA2byA2contaminatedA2waterA2alsoA2knownA2asA2waterbornA2diseaseA2are?A2-
A2Ans--Dysentery,A2Hyphoid,A2Giardiasis,A2Hepatitis
TEST QUESTIONS AND CORRECT
ANSWERS
AA2trenchA224inA2wideA2800ftA2longA2andA24ftA2deepA2isA2toA2beA2excavated.A2TheA2amoun
tA2ofA2soilA2excavatedA2is?A2-A2Ans--6400ft
AnA2elevatedA2storageA2tankA2hadA2pipeA2150A2feetA2aboveA2groundA2whenA2fullA2waterA2p
ressureA2atA2theA2bottomA2psiA2shouldA2be?A2-A2Ans--65
ChlorineA2dosageA2forA2waterA2isA22.7mg/
lA2ifA2chlorineA2residualA2afterA230A2minutesA2isA20.8mg/
l.A2WhatA2isA2demandA2expressedA2inA2mg/l?A2-A2Ans--1.9
WaterA2isA2pumpedA2250A2gallonsA2aA2min.A2HowA2longA2toA2fillA2100,000A2gallonA2tank?
A2-A2Ans--6.6
AA2freeA2chlorineA2residualA2ofA20.6mg/
lA2isA2desiredA2howA2manyA2mg/
lA2ofA2chlorineA2willA2beA2neededA2whenA2chlorineA2demandA2ofA2waterA2isA22.2mn/l?A2-
A2Ans--1.6
AA2chlorineA2dosageA2ofA22mg/
lA2isA2toA2beA2addedA2toA2600,000A2gallonsA2ofA2waterA2howA2manyA2poundsA2ofA2chlorineA
2100%A2areA2neededA2toA2obtainA2thisA2concentration?A2-A2Ans--10
TheA2hydrologicA2cycleA2is?A2-A2Ans--
RecyclingA2ofA2waterA2betweenA2theA2earthA2&A2atmosphere
BasicA2waterA2PHA2readingA2is?A2-A2Ans--8.5
AA2chemicalA2ofA2waterA2impactingA2scalingA2is?A2-A2Ans--Calcium
WhatA2isA2RawA2water?A2-A2Ans--UntreatedA2water
RegulatedA2chemicalA2compoundA2formedA2whenA2disinfectantsA2reactA2withA2naturallyA2o
ccurringA2organicA2matter?A2-A2Ans--ByA2productsA2THM/HAA
DiseasesA2byA2contaminatedA2waterA2alsoA2knownA2asA2waterbornA2diseaseA2are?A2-
A2Ans--Dysentery,A2Hyphoid,A2Giardiasis,A2Hepatitis
