TENNESSEE SEPTIC SYSTEMS INSTALLATION
ACTUAL TEST PAPER 2026 FULL ANSWERS
GRADED A+
⩥ Septic tank covers shall have a minimum cross sectional opening of
how many inches?.
Answer: 15inches
⩥ Septic tank openings shall have a minimum area of?.
Answer: 225square ft
⩥ The minimum ultimate tensile strength of a polyethylene septic tanks
is?.
Answer: 2400psi
⩥ The minimum flexural strength of a polyethylene septic tank is?.
Answer: 80,000PSI
⩥ The passage between compartments of a septic tank shall be located
what percentage below the liquid level?.
Answer: Between 25%-50% starting from the top of the liquid level
going down or between 50%-75% starting from the bottom of the tank
towards the top of the liquid level.
,⩥ If the tee or baffle is constructed of plastic material it should be made
out of what grade material?.
Answer: NSF Standard #14 for drain
⩥ Can an ATU unit be installed by an authorized professional or can it
be installed by a septic installer?.
Answer: Has to be installed by an ATU professional.
⩥ In the absence of actual flow data how many gallons will be set aside
per room per day for an ATU unit?.
Answer: 150gallons per bedroom per day.
⩥ How far must an ATU alarm sound?.
Answer: 50ft
⩥ What distance should the alarm system produce 60-75dbA?.
Answer: 5ft
⩥ True or false: ATU units need a visual and auditory signal in the event
of a malfunction?.
Answer: True
, ⩥ How many data plates does an ATU unit need?.
Answer: Two. One on the tank and one on the electrical box
⩥ How many inspections come with an ATU unit?.
Answer: 6. Once every 6mo the for the first three years.
⩥ In the event of an emergency how long does it take an authorized
representative to come help?.
Answer: 48hrs
⩥ Where a gray water system is to be used what is the minimum size of
the gray water tank?.
Answer: 500gallons
⩥ How far away must a privy be from a well or spring?.
Answer: 100ft
⩥ How far must a privy be from a property line?.
Answer: 20ft
⩥ What depth must a privy be dug?.
Answer: Between 3 and 5ft
ACTUAL TEST PAPER 2026 FULL ANSWERS
GRADED A+
⩥ Septic tank covers shall have a minimum cross sectional opening of
how many inches?.
Answer: 15inches
⩥ Septic tank openings shall have a minimum area of?.
Answer: 225square ft
⩥ The minimum ultimate tensile strength of a polyethylene septic tanks
is?.
Answer: 2400psi
⩥ The minimum flexural strength of a polyethylene septic tank is?.
Answer: 80,000PSI
⩥ The passage between compartments of a septic tank shall be located
what percentage below the liquid level?.
Answer: Between 25%-50% starting from the top of the liquid level
going down or between 50%-75% starting from the bottom of the tank
towards the top of the liquid level.
,⩥ If the tee or baffle is constructed of plastic material it should be made
out of what grade material?.
Answer: NSF Standard #14 for drain
⩥ Can an ATU unit be installed by an authorized professional or can it
be installed by a septic installer?.
Answer: Has to be installed by an ATU professional.
⩥ In the absence of actual flow data how many gallons will be set aside
per room per day for an ATU unit?.
Answer: 150gallons per bedroom per day.
⩥ How far must an ATU alarm sound?.
Answer: 50ft
⩥ What distance should the alarm system produce 60-75dbA?.
Answer: 5ft
⩥ True or false: ATU units need a visual and auditory signal in the event
of a malfunction?.
Answer: True
, ⩥ How many data plates does an ATU unit need?.
Answer: Two. One on the tank and one on the electrical box
⩥ How many inspections come with an ATU unit?.
Answer: 6. Once every 6mo the for the first three years.
⩥ In the event of an emergency how long does it take an authorized
representative to come help?.
Answer: 48hrs
⩥ Where a gray water system is to be used what is the minimum size of
the gray water tank?.
Answer: 500gallons
⩥ How far away must a privy be from a well or spring?.
Answer: 100ft
⩥ How far must a privy be from a property line?.
Answer: 20ft
⩥ What depth must a privy be dug?.
Answer: Between 3 and 5ft
