Class D Basic Water Practice Test
questions with correct answers
A btrench b24in bwide b800ft blong band b4ft bdeep bis bto bbe bexcavated. bThe bamount bof
bsoil bexcavated bis? b- bcorrect banswers✔✔6400ft
An belevated bstorage btank bhad bpipe b150 bfeet babove bground bwhen bfull bwater
bpressure bat bthe bbottom bpsi bshould bbe? b- bcorrect banswers✔✔65
Chlorine bdosage bfor bwater bis b2.7mg/l bif bchlorine bresidual bafter b30 bminutes bis
b0.8mg/l. bWhat bis bdemand bexpressed bin bmg/l? b- bcorrect banswers✔✔1.9
Water bis bpumped b250 bgallons ba bmin. bHow blong bto bfill b100,000 bgallon btank? b-
bcorrect banswers✔✔6.6
A bfree bchlorine bresidual bof b0.6mg/l bis bdesired bhow bmany bmg/l bof bchlorine bwill bbe
bneeded bwhen bchlorine bdemand bof bwater bis b2.2mn/l? b- bcorrect banswers✔✔1.6
A bchlorine bdosage bof b2mg/l bis bto bbe badded bto b600,000 bgallons bof bwater bhow
bmany bpounds bof bchlorine b100% bare bneeded bto bobtain bthis bconcentration? b-
bcorrect banswers✔✔10
The bhydrologic bcycle bis? b- bcorrect banswers✔✔Recycling bof bwater bbetween bthe
bearth b& batmosphere
Basic bwater bPH breading bis? b- bcorrect banswers✔✔8.5
A bchemical bof bwater bimpacting bscaling bis? b- bcorrect banswers✔✔Calcium
What bis bRaw bwater? b- bcorrect banswers✔✔Untreated bwater
Regulated bchemical bcompound bformed bwhen bdisinfectants breact bwith bnaturally
boccurring borganic bmatter? b- bcorrect banswers✔✔By bproducts bTHM/HAA
Diseases bby bcontaminated bwater balso bknown bas bwaterborn bdisease bare? b- bcorrect
banswers✔✔Dysentery, bHyphoid, bGiardiasis, bHepatitis
A bfire band bexplosion bexsist bif bgranulated bdisinfectant, bcalcium bhydrochlorite bcome
bin bcontact bwith? b- bcorrect banswers✔✔Oil bpetro bproducts
questions with correct answers
A btrench b24in bwide b800ft blong band b4ft bdeep bis bto bbe bexcavated. bThe bamount bof
bsoil bexcavated bis? b- bcorrect banswers✔✔6400ft
An belevated bstorage btank bhad bpipe b150 bfeet babove bground bwhen bfull bwater
bpressure bat bthe bbottom bpsi bshould bbe? b- bcorrect banswers✔✔65
Chlorine bdosage bfor bwater bis b2.7mg/l bif bchlorine bresidual bafter b30 bminutes bis
b0.8mg/l. bWhat bis bdemand bexpressed bin bmg/l? b- bcorrect banswers✔✔1.9
Water bis bpumped b250 bgallons ba bmin. bHow blong bto bfill b100,000 bgallon btank? b-
bcorrect banswers✔✔6.6
A bfree bchlorine bresidual bof b0.6mg/l bis bdesired bhow bmany bmg/l bof bchlorine bwill bbe
bneeded bwhen bchlorine bdemand bof bwater bis b2.2mn/l? b- bcorrect banswers✔✔1.6
A bchlorine bdosage bof b2mg/l bis bto bbe badded bto b600,000 bgallons bof bwater bhow
bmany bpounds bof bchlorine b100% bare bneeded bto bobtain bthis bconcentration? b-
bcorrect banswers✔✔10
The bhydrologic bcycle bis? b- bcorrect banswers✔✔Recycling bof bwater bbetween bthe
bearth b& batmosphere
Basic bwater bPH breading bis? b- bcorrect banswers✔✔8.5
A bchemical bof bwater bimpacting bscaling bis? b- bcorrect banswers✔✔Calcium
What bis bRaw bwater? b- bcorrect banswers✔✔Untreated bwater
Regulated bchemical bcompound bformed bwhen bdisinfectants breact bwith bnaturally
boccurring borganic bmatter? b- bcorrect banswers✔✔By bproducts bTHM/HAA
Diseases bby bcontaminated bwater balso bknown bas bwaterborn bdisease bare? b- bcorrect
banswers✔✔Dysentery, bHyphoid, bGiardiasis, bHepatitis
A bfire band bexplosion bexsist bif bgranulated bdisinfectant, bcalcium bhydrochlorite bcome
bin bcontact bwith? b- bcorrect banswers✔✔Oil bpetro bproducts
