Commercial Contractor Exam Questions
with Correct Answers 2025
SepticBTankBSizingB-BCORRECTBANSWERB-SizedBforBdailyBpeakBflowBvolume
MinimumBSepticBTankBSizeB-BCORRECTBANSWERB-1000Bgallons
WhatBtypeBofBPVCBshouldBallBtanksBbeBequippedBwithBatBtheBinletBandBoutlet?B-
BCORRECTBANSWERB-4"BPVC
WhatBisBtheBminimumBextensionBofBliquidBforBteesBinBtanks?B-BCORRECTBANSWERB-
25%BofBliquidBdepth
WhatBisBtheBmaximumBextensionBofBliquidBforBteesBinBtanks?B-BCORRECTBANSWERB-
50%BofBliquidBdepth
HowBfarBbelowBtheBinvertBofBtheBinletBteeBshouldBtheBinvertBofBtheBoutletBteeBbeBlocated?B-
BCORRECTBANSWERB-2"Bbelow
WhatBshouldBoutletBteesBbeBequippedBwith?B-BCORRECTBANSWERB-
AnBeffluentBfilterBdesignedBtoBhandleBbothBtheBdailyBflowBvolumeBandBwastewaterBcharacteristics
TankBDimensionsB-BCORRECTBANSWERB-
LengthBshallBbeB1B1/2BtimesBtheBwidthBandBshallBhaveB2Bcompartments.
WhatBmustBbeBreinforcedBinBpoured-in-placeBsepticBtanks?B-BCORRECTBANSWERB-
WallsBandBbottomBofBtheBtanksBmustBbeBreinforced.
, WhatBtypeBofBreinforcingBrodsBmustBbeBusedBforBtankBlids?B-BCORRECTBANSWERB-
3/8"BsteelBreinforcingBrods.
WhatBisBtheBuniformBliveBloadBthatBaBsepticBtankBmustBwithstand?B-BCORRECTBANSWERB-
150BpoundsBperBsquareBfoot.
WhatBadditionalBloadsBmustBaBsepticBtankBbeBableBtoBwithstand?B-BCORRECTBANSWERB-
AllBloadsBtoBwhichBanBundergroundBtankBisBnormallyBsubjected.
ConcreteBSpecificationsB-BCORRECTBANSWERB-MinimumB28-
dayBcompressiveBstrengthBofB4000BpoundsBperBsquareBinch.
WhatBisBtheBrequirementBforBaBdosingBdeviceBinBsystemsBwithB500BlinearBfeetBofBfieldBline?B-
BCORRECTBANSWERB-500BlinearBfeetBofBfieldBlineBorBmoreBmustBhaveBaBdosingBdevice.
WhatBisBtheBrequirementBforBsystemsBwithBoverB500BlinearBfeetBbutBlessBthanB1000BlinearBfeet?B-
BCORRECTBANSWERB-TheyBareBonlyBrequiredBtoBhaveBaBsingleBpump.
WhatBareBtheBconstructionBmaterialBrequirementsBforBdosingBtanks?B-BCORRECTBANSWERB-
SameBconstructionBmaterialsBandBreinforcementBrequirementsBasBsepticBtanks.
CanBoneBorBtwoBpieceBdosingBtanksBbeBused?B-BCORRECTBANSWERB-
Yes,BoneBorBtwoBpieceBdosingBtanksBmayBbeBused.
HowBshouldBtwoBpieceBdosingBtankBsectionsBbeBjoined?B-BCORRECTBANSWERB-
TheyBmustBbeBjoinedBbyBusingBmastic,BbutylBrubber,BorBotherBpliableBsealantBthatBisBwaterproof.
WhatBisBtheBrequiredBdiameterBforBaBwater-tightBaccessBcoverBonBdosingBtanks?B-
BCORRECTBANSWERB-AtBleastB24Binches
with Correct Answers 2025
SepticBTankBSizingB-BCORRECTBANSWERB-SizedBforBdailyBpeakBflowBvolume
MinimumBSepticBTankBSizeB-BCORRECTBANSWERB-1000Bgallons
WhatBtypeBofBPVCBshouldBallBtanksBbeBequippedBwithBatBtheBinletBandBoutlet?B-
BCORRECTBANSWERB-4"BPVC
WhatBisBtheBminimumBextensionBofBliquidBforBteesBinBtanks?B-BCORRECTBANSWERB-
25%BofBliquidBdepth
WhatBisBtheBmaximumBextensionBofBliquidBforBteesBinBtanks?B-BCORRECTBANSWERB-
50%BofBliquidBdepth
HowBfarBbelowBtheBinvertBofBtheBinletBteeBshouldBtheBinvertBofBtheBoutletBteeBbeBlocated?B-
BCORRECTBANSWERB-2"Bbelow
WhatBshouldBoutletBteesBbeBequippedBwith?B-BCORRECTBANSWERB-
AnBeffluentBfilterBdesignedBtoBhandleBbothBtheBdailyBflowBvolumeBandBwastewaterBcharacteristics
TankBDimensionsB-BCORRECTBANSWERB-
LengthBshallBbeB1B1/2BtimesBtheBwidthBandBshallBhaveB2Bcompartments.
WhatBmustBbeBreinforcedBinBpoured-in-placeBsepticBtanks?B-BCORRECTBANSWERB-
WallsBandBbottomBofBtheBtanksBmustBbeBreinforced.
, WhatBtypeBofBreinforcingBrodsBmustBbeBusedBforBtankBlids?B-BCORRECTBANSWERB-
3/8"BsteelBreinforcingBrods.
WhatBisBtheBuniformBliveBloadBthatBaBsepticBtankBmustBwithstand?B-BCORRECTBANSWERB-
150BpoundsBperBsquareBfoot.
WhatBadditionalBloadsBmustBaBsepticBtankBbeBableBtoBwithstand?B-BCORRECTBANSWERB-
AllBloadsBtoBwhichBanBundergroundBtankBisBnormallyBsubjected.
ConcreteBSpecificationsB-BCORRECTBANSWERB-MinimumB28-
dayBcompressiveBstrengthBofB4000BpoundsBperBsquareBinch.
WhatBisBtheBrequirementBforBaBdosingBdeviceBinBsystemsBwithB500BlinearBfeetBofBfieldBline?B-
BCORRECTBANSWERB-500BlinearBfeetBofBfieldBlineBorBmoreBmustBhaveBaBdosingBdevice.
WhatBisBtheBrequirementBforBsystemsBwithBoverB500BlinearBfeetBbutBlessBthanB1000BlinearBfeet?B-
BCORRECTBANSWERB-TheyBareBonlyBrequiredBtoBhaveBaBsingleBpump.
WhatBareBtheBconstructionBmaterialBrequirementsBforBdosingBtanks?B-BCORRECTBANSWERB-
SameBconstructionBmaterialsBandBreinforcementBrequirementsBasBsepticBtanks.
CanBoneBorBtwoBpieceBdosingBtanksBbeBused?B-BCORRECTBANSWERB-
Yes,BoneBorBtwoBpieceBdosingBtanksBmayBbeBused.
HowBshouldBtwoBpieceBdosingBtankBsectionsBbeBjoined?B-BCORRECTBANSWERB-
TheyBmustBbeBjoinedBbyBusingBmastic,BbutylBrubber,BorBotherBpliableBsealantBthatBisBwaterproof.
WhatBisBtheBrequiredBdiameterBforBaBwater-tightBaccessBcoverBonBdosingBtanks?B-
BCORRECTBANSWERB-AtBleastB24Binches