COMMERCIAL SEPTIC SYSTEM
INSTALLER EXAM QUESTIONS AND
ANSWERS
All,tanks,must,have:,-,ans--2,compartments
All,tanks,whether,pre-
manufactured,or,constructed,on,site,shall,be,constructed,so,that,the,length,is,___________
,compared,to,the,width.,-,ans--at,least,one,and,one-,half,(1,1/2),times...,"to,the,width."
Septic,Tanks,may,be,made,of:,-,ans--
Concrete,,Plastic,,fiberglass,,or,other,materials,as,approved,by,the,department.
Tank,compartment,partitions,will,be,located:,-,ans--Not,less,than,two-
thirds,or,more,than,three-fourths,the,Length,of,the,tank,from,the,Inlet,end.
Compartment,partitions,will,be,constructed,so,a,pass-
thru,hole,or,slot,equal,to,or,greater,than,the,diameter,of,the,inlet,pipe,is,positioned,below,the,
liquid,surface,with,a,_____________________________.,-,ans--
Minimum,25%,to,a,maximum,of,50%,of,the,total,liquid,depth.
Total,liquid,depth,for,larger,poured-in-
place,tanks,shall,have,a,maximum,of,______________inches,-,ans--66,inches
True,or,False:,Walls,and,bottom,of,poured-in-place,septic,tanks,must,be,reinforced.,-,ans--
True
How,can,a,Septic,tank,be,reinforced?,-,ans--six,inch,by,6,inch,
(6"x6"),No.10,gage,welded,steel,reinforcing,wire,OR,fibrous,reinforcing,material,conformin
g,to,ASTM,specifications,for,such,materials.
How,must,Tank,Lids,be,Reinforced?,-,ans--using,three-eights,steel,reinforcing,rods,
(rebar),which,shall,be,spaced,twelve,inches,
(12"),on,center,each,way,extending,a,minimum,of,two,and,one,half,
(2,1/2"),inches,and,a,maximum,of,three,(3"),from,the,outside,edge,of,the,tank,lid.
In,general,,the,tank,must,be,able,to,withstand,a,uniform,live,load,of,___________________
___,pounds,per,square,foot,in,addition,to,all,loads,to,which,an,underground,tank,is,normally,
subjected.,-,ans--150
, True,or,False:,Walls,,bottoms,,and,lids,of,poured-in-
place,septic,tanks,should,have,a,minimum,thickness,of,four,inches,(4").,-,ans--True
Tank,lids,shall,be,constructed,in,______________________,pieces,and,shall,have,secura
ble,,removable,access,openings,located,so,that,the,inlet,and,outlet,tees,can,be,_________
_______________________.,-,ans--one,or,two,,
readily,accessed.
Access,opening,shall,have,a,minimum,of,_________________,and,maximum,of,________
___________,free,space.,-,ans--Minimum:,15"
Maximum:,24"
Tanks,with,more,than,12,inches,of,cover,must,extend,access,openings,to,within,______,inc
hes,of,the,ground,surface.,-,ans--12
All,tanks,shall,be,equipped,with,________________________________ ,rated,or,equivale
nt,tees,at,the,inlet,and,outlet,ends,of,the,tank.,-,ans--Four,inch,(4"),PVC,,ASTM,3034
Tees,shall,be,constructed,so,they,extend,into,the,liquid,a,minimum,of,_________________
___,and,a,maximum,of,__________________,of,the,liquid,depth,of,the,tank.,-,ans--
Min:,25%
Max:,50%
The,invert,of,the,outlet,tee,shall,be,located,_______________,inches,below,the,invert,of,the
,inlet,tee.,-,ans--two,inches
__________________,tees,shall,be,equipped,with,an,approved,effluent,filter.,-,ans--Outlet
Concrete,used,for,poured-in-place,or,pre-
cast,septic,tanks,shall,have,a,minimum,________________________.,-,ans--
28,day,compressive,strength,of,4000,pounds,per,square,inch.
When,pouring,concrete,,care,should,be,taken,to,assure,such,operations,are,not,done,durin
g,freezing,or,other,wise,inclement,periods,because,______________________________
___.,-,ans--it,could,damage,the,integrity,of,the,finished,product.
the,finished,poured,concrete,product,should,have,what,texture,and,finish?,-,ans--
smooth,homogeneous,consistency,and,finish.
True,of,False:,Vibrating,the,forms,or,mix,may,be,helpful,in,eliminating,"honey,combing",or,"
bridging",in,the,finished,product.,-,ans--True
Who's,responsibility,is,it,to,assure,the,quality,of,the,finished,product?,-,ans--The,on-
site,sewage,contractor.
INSTALLER EXAM QUESTIONS AND
ANSWERS
All,tanks,must,have:,-,ans--2,compartments
All,tanks,whether,pre-
manufactured,or,constructed,on,site,shall,be,constructed,so,that,the,length,is,___________
,compared,to,the,width.,-,ans--at,least,one,and,one-,half,(1,1/2),times...,"to,the,width."
Septic,Tanks,may,be,made,of:,-,ans--
Concrete,,Plastic,,fiberglass,,or,other,materials,as,approved,by,the,department.
Tank,compartment,partitions,will,be,located:,-,ans--Not,less,than,two-
thirds,or,more,than,three-fourths,the,Length,of,the,tank,from,the,Inlet,end.
Compartment,partitions,will,be,constructed,so,a,pass-
thru,hole,or,slot,equal,to,or,greater,than,the,diameter,of,the,inlet,pipe,is,positioned,below,the,
liquid,surface,with,a,_____________________________.,-,ans--
Minimum,25%,to,a,maximum,of,50%,of,the,total,liquid,depth.
Total,liquid,depth,for,larger,poured-in-
place,tanks,shall,have,a,maximum,of,______________inches,-,ans--66,inches
True,or,False:,Walls,and,bottom,of,poured-in-place,septic,tanks,must,be,reinforced.,-,ans--
True
How,can,a,Septic,tank,be,reinforced?,-,ans--six,inch,by,6,inch,
(6"x6"),No.10,gage,welded,steel,reinforcing,wire,OR,fibrous,reinforcing,material,conformin
g,to,ASTM,specifications,for,such,materials.
How,must,Tank,Lids,be,Reinforced?,-,ans--using,three-eights,steel,reinforcing,rods,
(rebar),which,shall,be,spaced,twelve,inches,
(12"),on,center,each,way,extending,a,minimum,of,two,and,one,half,
(2,1/2"),inches,and,a,maximum,of,three,(3"),from,the,outside,edge,of,the,tank,lid.
In,general,,the,tank,must,be,able,to,withstand,a,uniform,live,load,of,___________________
___,pounds,per,square,foot,in,addition,to,all,loads,to,which,an,underground,tank,is,normally,
subjected.,-,ans--150
, True,or,False:,Walls,,bottoms,,and,lids,of,poured-in-
place,septic,tanks,should,have,a,minimum,thickness,of,four,inches,(4").,-,ans--True
Tank,lids,shall,be,constructed,in,______________________,pieces,and,shall,have,secura
ble,,removable,access,openings,located,so,that,the,inlet,and,outlet,tees,can,be,_________
_______________________.,-,ans--one,or,two,,
readily,accessed.
Access,opening,shall,have,a,minimum,of,_________________,and,maximum,of,________
___________,free,space.,-,ans--Minimum:,15"
Maximum:,24"
Tanks,with,more,than,12,inches,of,cover,must,extend,access,openings,to,within,______,inc
hes,of,the,ground,surface.,-,ans--12
All,tanks,shall,be,equipped,with,________________________________ ,rated,or,equivale
nt,tees,at,the,inlet,and,outlet,ends,of,the,tank.,-,ans--Four,inch,(4"),PVC,,ASTM,3034
Tees,shall,be,constructed,so,they,extend,into,the,liquid,a,minimum,of,_________________
___,and,a,maximum,of,__________________,of,the,liquid,depth,of,the,tank.,-,ans--
Min:,25%
Max:,50%
The,invert,of,the,outlet,tee,shall,be,located,_______________,inches,below,the,invert,of,the
,inlet,tee.,-,ans--two,inches
__________________,tees,shall,be,equipped,with,an,approved,effluent,filter.,-,ans--Outlet
Concrete,used,for,poured-in-place,or,pre-
cast,septic,tanks,shall,have,a,minimum,________________________.,-,ans--
28,day,compressive,strength,of,4000,pounds,per,square,inch.
When,pouring,concrete,,care,should,be,taken,to,assure,such,operations,are,not,done,durin
g,freezing,or,other,wise,inclement,periods,because,______________________________
___.,-,ans--it,could,damage,the,integrity,of,the,finished,product.
the,finished,poured,concrete,product,should,have,what,texture,and,finish?,-,ans--
smooth,homogeneous,consistency,and,finish.
True,of,False:,Vibrating,the,forms,or,mix,may,be,helpful,in,eliminating,"honey,combing",or,"
bridging",in,the,finished,product.,-,ans--True
Who's,responsibility,is,it,to,assure,the,quality,of,the,finished,product?,-,ans--The,on-
site,sewage,contractor.
