Tennessee Septic System Exam UPDATED ACTUAL
QUESTIONS AND CORRECT Answers
How many years from the date of issuance is a septic 3 Years
permit good for?
The minimum square footage of a trench bottom 370
installed per bedroom shall be?
Soil absorption rates greater than ______ minutes per inch 75
are considered unsuitable for a conventional
subsurface sewage system.
Soil percolation rates less than _____ minutes per inch 106
may be used for conventional systems under authority
of TCA.
Recirculating design is where the elevation in the area 12
utilized for the absorption field does not exceed____
inches
Recirculating design--- Connecting successive trenches Level, 4
on both ends and by maintaining the grade in the
bottom of these trenches from ____ to no more than
_ ___inches
Serial distribution system This design is preferred where the elevation difference of the ground surface
over the absorption field area exceeds 12 Inches.
Large Conventional Systems Those exceeding 2250 square feet of disposal field
When the design daily flow from a single source Siphons, Pumps, 3000
exceeds 3000 gallons per day, _______ or shall be
used which shall discharge to separate disposal fields.
Each System shall not exceed a design capacity of
_ ___ gallons per day
The pipe size from the septic tank to the disposal field 3, 40
or pump chamber shall not be less than inches in
diameter and shall be Schedule ___ PVC
There must be a minimum of ____ feet of undisturbed 6
earth between adjacent trench walls shall be required.
, Pipe for relief lines shall have no ______ and shall have a perforations, 4, 40, 3
minimum inside diameter of inches and conform to
or exceed the standards of ASTM, however Schedule ___
pipe, or its equivalent with a minimum inside diameter
of ___ inches may be used
Invert of the overflow pipe in the first relief line shall be 4
at least ___ inches lower than the invert of the septic
tank outlet.
Trenches shall not be excavated when the soil is? wet enough to smear or compact easily.
Media for disposal fields shall consist of _________, _________ Crushed rock, gravel, other suitable material
or ________ 2, 3, 4, 24
They shall be size numbers ____, ____, _____, or________ coarse dust, clay, sand, or excessive fines
aggregate. 2 1/2, 1/2
The material shall be free from ______, ________, ___ ,
or________
Atleast 90 percent of the material must pass a ____ inch
screen and not more than 5 percent may pass a ______
inch screen.
Media for the disposal fields shall extend from at least 2, 6
____ inches above the top of the perforated field line
pipe to at least _ inches below the bottom of the
perforated field line pipe. (Minimum of ___ inches total)
When backfilling with the materials used from digging Left mounded over the trenches until initial settling has taken place
the trench it should be?
There shall be a minimum of _____ inches of ground cover 12, 36
over the disposal field media and the maximum shall be
is __ inches of fill
All pipes under paved areas or under driveways shall Schedule 40 PVC and have a minimum inside diameter of 3 inches
be
The pipe used in the disposal field trenches shall have a 4, 1/2
minimum diameter of _ inches and perforated with
_ __ inch holes.
The maximum length of a single line should not exceed 100
_ __ feet unless conditions require a longer line
The maximum depth of a trench shall be _____ inches and 48, 24
the minimum depth shall be _ inches except for
systems designed for pursuant.
A septic system shall not be bypassed by a? Direct line (Laundry, Grease, ETC.)
Water lines shall not cross a subsurface sewage The water line is sleeved in a continuous 20 feet section of schedule 40 PVC
disposal field unless? pipe and the water line is a minimum of 1 foot vertically above the tight line.
A septic tank shall be______ ________ Water tight
QUESTIONS AND CORRECT Answers
How many years from the date of issuance is a septic 3 Years
permit good for?
The minimum square footage of a trench bottom 370
installed per bedroom shall be?
Soil absorption rates greater than ______ minutes per inch 75
are considered unsuitable for a conventional
subsurface sewage system.
Soil percolation rates less than _____ minutes per inch 106
may be used for conventional systems under authority
of TCA.
Recirculating design is where the elevation in the area 12
utilized for the absorption field does not exceed____
inches
Recirculating design--- Connecting successive trenches Level, 4
on both ends and by maintaining the grade in the
bottom of these trenches from ____ to no more than
_ ___inches
Serial distribution system This design is preferred where the elevation difference of the ground surface
over the absorption field area exceeds 12 Inches.
Large Conventional Systems Those exceeding 2250 square feet of disposal field
When the design daily flow from a single source Siphons, Pumps, 3000
exceeds 3000 gallons per day, _______ or shall be
used which shall discharge to separate disposal fields.
Each System shall not exceed a design capacity of
_ ___ gallons per day
The pipe size from the septic tank to the disposal field 3, 40
or pump chamber shall not be less than inches in
diameter and shall be Schedule ___ PVC
There must be a minimum of ____ feet of undisturbed 6
earth between adjacent trench walls shall be required.
, Pipe for relief lines shall have no ______ and shall have a perforations, 4, 40, 3
minimum inside diameter of inches and conform to
or exceed the standards of ASTM, however Schedule ___
pipe, or its equivalent with a minimum inside diameter
of ___ inches may be used
Invert of the overflow pipe in the first relief line shall be 4
at least ___ inches lower than the invert of the septic
tank outlet.
Trenches shall not be excavated when the soil is? wet enough to smear or compact easily.
Media for disposal fields shall consist of _________, _________ Crushed rock, gravel, other suitable material
or ________ 2, 3, 4, 24
They shall be size numbers ____, ____, _____, or________ coarse dust, clay, sand, or excessive fines
aggregate. 2 1/2, 1/2
The material shall be free from ______, ________, ___ ,
or________
Atleast 90 percent of the material must pass a ____ inch
screen and not more than 5 percent may pass a ______
inch screen.
Media for the disposal fields shall extend from at least 2, 6
____ inches above the top of the perforated field line
pipe to at least _ inches below the bottom of the
perforated field line pipe. (Minimum of ___ inches total)
When backfilling with the materials used from digging Left mounded over the trenches until initial settling has taken place
the trench it should be?
There shall be a minimum of _____ inches of ground cover 12, 36
over the disposal field media and the maximum shall be
is __ inches of fill
All pipes under paved areas or under driveways shall Schedule 40 PVC and have a minimum inside diameter of 3 inches
be
The pipe used in the disposal field trenches shall have a 4, 1/2
minimum diameter of _ inches and perforated with
_ __ inch holes.
The maximum length of a single line should not exceed 100
_ __ feet unless conditions require a longer line
The maximum depth of a trench shall be _____ inches and 48, 24
the minimum depth shall be _ inches except for
systems designed for pursuant.
A septic system shall not be bypassed by a? Direct line (Laundry, Grease, ETC.)
Water lines shall not cross a subsurface sewage The water line is sleeved in a continuous 20 feet section of schedule 40 PVC
disposal field unless? pipe and the water line is a minimum of 1 foot vertically above the tight line.
A septic tank shall be______ ________ Water tight
