INSTALLER'S TEST QUESTIONS WITH CORRECT ANSWERS RATED A+ 2025/2026

INSTALLER'S TEST QUESTIONS WITH
CORRECT ANSWERS RATED A+
2025/2026
Theegraveleinetheedisposalefieldetrencheseshallenotebeecoveredewithewhicheofetheefollowing?

a)euntreatedebuildingepaper

b)e6-mileblackeplastic

c)e2einchelayereofestraw

d)eOtherematerialedeterminedeequivalentebyetheeCommissionere-eCORRECTeANSWERSeb)e6-
mileblackeplastic



Theesoileareaerequiredeforetheeinstallationeofeaeconventionalesubstituteesystemeis?

a)e30%elessethaneforeaeconventionalesystem

b)eaelargeresoilefootprintethaneaeconventionalesystem

c)etheesameesoilefootprinteaseaeconventionalesysteme-
eCORRECTeANSWERSec)eTheesameesoilefootprinteaseaeconventionalesystem




Ifetheepermitespecifiesethatetheesystemeisetoebeeinstallede24einchesedeep,ethisemeans?

a)e24einchesefrometheesurfaceeofetheegroundetoetheetopeofetheegravel

b)e24einchefrometheetopeofetheegroundetoetheebottomeofetheetrencheandelineseinstalledeonecontour

c)etrenchedepthemayevaryebetweene24etoe30einchese-
eCORRECTeANSWERSeb)e24einchesefrometheetopeofetheegroundetoetheebottomeofetheetrencheandelin


eseinstalledeonecontour



Inesoilsethateareeapprovedebyepercolationetestseoreevaluatedetoehaveeabsorptioneratesehigherethane
60eMPIeLDGPesystemserequire?

a)einstallationeineae24einchetrenchewithegravelebackefilleleveledetoetheetopeofetheeLDGP

b)einstallationeineae24einchetrenchewitheaequalityetopesoilebackfill

, c)einstallationeineane18einchetrenchewithegravelebackfilletoetheetopeofetheeLDGP

d)einstallationeineae24einchetrenchewithegravelebackfilletoe2eincheseaboveeLDGPe-
eCORRECTeANSWERSea)einstallationeineae24einchetrenchewithegravelebackefilleleveledetoetheetopeofeth


eeLDGP



Theemaximumetrenchewidtheallowedeforeae24einchewideechambereproducteis

a)e24einches

b)e30einches

c)e34einches

d)e36einchese-eCORRECTeANSWERSeb)e30einches



Whateisetheeproperevolumeeofeaedosinge(pump)echamber?

a)esameeasetheesepticetank

b)e1000egallons

c)etwoetimesetheedailyewasteewatereflow

d)e900egallonse-eCORRECTeANSWERSec)etwoetimesetheedailyewasteewatereflow



Wheneinstallingeconventionaleandeconventionalesubstituteesystems

a)edisposalefieldetrencheseshallefollowetheecontoureofetheegroundesurface

b)eaeminimumeofe6efteofeundisturbedeeartheshallebeerequiredebetweenetrenches

c)etrencheseshallenotebeeexcavatedewhenetheesoileiseweteenoughetoesmeareorecompacte

d)ealleofetheeabovee-eCORRECTeANSWERSed)ealletheeabove



Aneinstalleremayecalleforeaefinaleinspectioneoneaesystemethateutilizeseaepumpededosingesystemeafter
?

a)etheefieldelinesehaveebeeneinstalled