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WV SEPTIC INSTALLERS EXAM QUESTIONS AND
ANSWERS 2025
All tanks must have: - .....ANSWER ...✔✔ 2
compartments
All tanks whether pre-manufactured or constructed on
site shall be constructed so that the length is
___________ compared to the width. - .....ANSWER
...✔✔ at least one and one- half (1 1/2) times... "to
the width."
Septic Tanks may be made of: - .....ANSWER ...✔✔
Concrete, Plastic, fiberglass, or other materials as
approved by the department.
Tank compartment partitions will be located: -
.....ANSWER ...✔✔ Not less than two-thirds or more
than three-fourths the Length of the tank from the Inlet
end.
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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 _____________________________. -
.....ANSWER ...✔✔ 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 -
.....ANSWER ...✔✔ 66 inches
True or False: Walls and bottom of poured-in-place
septic tanks must be reinforced. - .....ANSWER ...✔✔
True
How can a Septic tank be reinforced? - .....ANSWER
...✔✔ six inch by 6 inch (6"x6") No.10 gage welded
steel reinforcing wire OR fibrous reinforcing material
conforming to ASTM specifications for such materials.
How must Tank Lids be Reinforced? - .....ANSWER
...✔✔ 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")
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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. - .....ANSWER
...✔✔ 150
True or False: Walls, bottoms, and lids of poured-in-
place septic tanks should have a minimum thickness of
four inches (4"). - .....ANSWER ...✔✔ True
Tank lids shall be constructed in
______________________ pieces and shall have
securable, removable access openings located so that
the inlet and outlet tees can be
________________________________. - .....ANSWER
...✔✔ one or two,
readily accessed.
Access opening shall have a minimum of
_________________ and maximum of
___________________ free space. - .....ANSWER
...✔✔ Minimum: 15"
WV SEPTIC INSTALLERS EXAM QUESTIONS AND
ANSWERS 2025
All tanks must have: - .....ANSWER ...✔✔ 2
compartments
All tanks whether pre-manufactured or constructed on
site shall be constructed so that the length is
___________ compared to the width. - .....ANSWER
...✔✔ at least one and one- half (1 1/2) times... "to
the width."
Septic Tanks may be made of: - .....ANSWER ...✔✔
Concrete, Plastic, fiberglass, or other materials as
approved by the department.
Tank compartment partitions will be located: -
.....ANSWER ...✔✔ Not less than two-thirds or more
than three-fourths the Length of the tank from the Inlet
end.
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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 _____________________________. -
.....ANSWER ...✔✔ 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 -
.....ANSWER ...✔✔ 66 inches
True or False: Walls and bottom of poured-in-place
septic tanks must be reinforced. - .....ANSWER ...✔✔
True
How can a Septic tank be reinforced? - .....ANSWER
...✔✔ six inch by 6 inch (6"x6") No.10 gage welded
steel reinforcing wire OR fibrous reinforcing material
conforming to ASTM specifications for such materials.
How must Tank Lids be Reinforced? - .....ANSWER
...✔✔ 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")
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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. - .....ANSWER
...✔✔ 150
True or False: Walls, bottoms, and lids of poured-in-
place septic tanks should have a minimum thickness of
four inches (4"). - .....ANSWER ...✔✔ True
Tank lids shall be constructed in
______________________ pieces and shall have
securable, removable access openings located so that
the inlet and outlet tees can be
________________________________. - .....ANSWER
...✔✔ one or two,
readily accessed.
Access opening shall have a minimum of
_________________ and maximum of
___________________ free space. - .....ANSWER
...✔✔ Minimum: 15"
