Commercial Septic System Installer Exam Questions and Answers 2024/2025
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Module
Commercial Septic System
Institution
Commercial Septic System
All tanks must have:
2 compartments
All tanks whether pre-manufactured or constructed on site shall be constructed so that the
length is ___________ compared to the width.
at least one and one- half (1 1/2) times... "to the width."
Septic Tanks may be made of:
Concrete, Plastic, ...
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?
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.
150
True or False: Walls, bottoms, and lids of poured-in-place septic tanks should have a minimum
thickness of four inches (4").
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
________________________________.
one or two,
readily accessed.
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