Exam (elaborations)
2024 COMMERCIAL SEPTIC SYSTEM INSTALLER EXAM WITH CORRECT ANSWERS
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2024 COMMERCIAL SEPTIC SYSTEM INSTALLER EXAM WITH CORRECT ANSWERS
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2024 COMMERCIAL SEPTICSYSTEM INSTALLER EXAM WITH
CORRECT ANSWERS
All tanks must have: - CORRECT-ANSWERS2 compartments
All tanks whether pre-manufactured or constructed on site shall be
constructed so that the length is ___________ compared to the width. -
CORRECT-ANSWERSat least one and one- half (1 1/2) times... "to the width."
Septic Tanks may be made of: - CORRECT-ANSWERSConcrete, Plastic,
fiberglass, or other materials as approved by the department.
Total liquid depth for larger poured-in-place tanks shall have a maximum of
______________inches - CORRECT-ANSWERS66 inches
True or False: Walls and bottom of poured-in-place septic tanks must be
reinforced. - CORRECT-ANSWERSTrue
How can a Septic tank be reinforced? - CORRECT-ANSWERSsix 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? - CORRECT-ANSWERSusing 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. - CORRECT-ANSWERS150
True or False: Walls, bottoms, and lids of poured-in-place septic tanks should
have a minimum thickness of four inches (4"). - CORRECT-ANSWERSTrue
Tank lids shall be constructed in ______________________ pieces and shall have
securable, removable access openings located so that the inlet and outlet
, tees can be ________________________________. - CORRECT-ANSWERSone or
two,
readily accessed.
Access opening shall have a minimum of _________________ and maximum of
___________________ free space. - CORRECT-ANSWERSMinimum: 15"
Maximum: 24"
Tanks with more than 12 inches of cover must extend access openings to
within ______ inches of the ground surface. - CORRECT-ANSWERS12
All tanks shall be equipped with ________________________________ rated or
equivalent tees at the inlet and outlet ends of the tank. - CORRECT-
ANSWERSFour 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. - CORRECT-ANSWERSMin: 25%
Max: 50%
The invert of the outlet tee shall be located _______________ inches below the
invert of the inlet tee. - CORRECT-ANSWERStwo inches
__________________ tees shall be equipped with an approved effluent filter. -
CORRECT-ANSWERSOutlet
Concrete used for poured-in-place or pre-cast septic tanks shall have a
minimum ________________________. - CORRECT-ANSWERS28 day compressive
strength of 4000 pounds per square inch.
When pouring concrete, care should be taken to assure such operations are
not done during freezing or other wise inclement periods because
_________________________________. - CORRECT-ANSWERSit could damage the
integrity of the finished product.
the finished poured concrete product should have what texture and finish? -
CORRECT-ANSWERSsmooth 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. - CORRECT-
ANSWERSTrue
Who's responsibility is it to assure the quality of the finished product? -
CORRECT-ANSWERSThe on-site sewage contractor.
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