4/5/25, 6:43 Commercial Septic System Installer Exam |
PM
COMMERCIAL SEPTIC SYSTEM INSTALLER EXAM QUESTIONS AND
ANSWERS WITH COMPLETE SOLUTIONS VERIFIED LATEST UPDATE
Practice questions for this set
Learn 1/7 Study using Learn
True or False: Walls and bottom of poured-in-place septic tanks must be reinforced.
Select the correct definition
1True 2False
Don't know?
All tanks must have: 2 compartments
All tanks whether pre-manufactured or at least one and one- half (1 1/2) times... "to the width."
constructed on site shall be
constructed so that the length is
__________________________compared
to
the width.
Septic Tanks may be made of: Concrete, Plastic, fiberglass, or other materials as approved by the department.
Tank compartment partitions will Not less than two-thirds or more than three-fourths the Length of the tank from
be located: the Inlet end.
Compartment partitions will be Minimum 25% to a maximum of 50% of the total liquid depth.
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____________________.
Total liquid depth for larger poured-in- 66 inches
place tanks shall have a maximum of
__________inches
True or False: Walls and bottom of True
poured-in-place septic tanks must be
reinforced.
six inch by 6 inch (6"x6") No.10 gage welded steel reinforcing wire OR fibrous
How can a Septic tank be reinforced?
reinforcing material conforming to ASTM specifications for such materials.
using three-eights steel reinforcing rods (rebar) which shall be spaced twelve
How must Tank Lids be Reinforced? 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.
1/
6
, 4/5/25, 6:43 Commercial Septic System Installer Exam |
PM
In general, the tank must be able to 150
withstand a uniform live load of
_______________pounds per square foot
in addition to all loads to which an
underground tank is normally subjected.
True or False: Walls, bottoms, and lids of True
poured-in-place septic tanks should have
a minimum thickness of four inches (4").
Tank lids shall be constructed in one or two,
_______________pieces and shall have readily accessed.
securable, removable access openings
located so that the inlet and outlet
tees can be_________________.
Access opening shall have a minimum of Minimum: 15"
____________and maximum of Maximum: 24"
_____________free space.
Tanks with more than 12 inches of cover 12
must extend access openings to within
_____inches of the ground surface.
All tanks shall be equipped with Four inch (4") PVC, ASTM 3034
______________________rated or
equivalent tees at the inlet and outlet
ends of the tank.
Tees shall be constructed so they extend Min: 25%
into the liquid a minimum of Max: 50%
______________and a maximum of
_____________of the liquid depth of the
tank.
The invert of the outlet tee shall two inches
be located________inches below
the
invert of the inlet tee.
_____________tees shall be equipped with Outlet
an approved effluent filter.
Concrete used for poured-in-place 28 day compressive strength of 4000 pounds per square inch.
or pre-cast septic tanks shall have
a minimum______________.
When pouring concrete, care should be it could damage the integrity of the finished product.
taken to assure such operations are not
done during freezing or other wise
inclement periods because
_________________________________.
the finished poured concrete smooth homogeneous consistency and finish.
product should have what texture
and finish?
True of False: Vibrating the forms or mix True
may be helpful in eliminating "honey
combing" or "bridging" in the finished
product.
Who's responsibility is it to assure the The on-site sewage contractor.
quality of the finished product?
2/
6
PM
COMMERCIAL SEPTIC SYSTEM INSTALLER EXAM QUESTIONS AND
ANSWERS WITH COMPLETE SOLUTIONS VERIFIED LATEST UPDATE
Practice questions for this set
Learn 1/7 Study using Learn
True or False: Walls and bottom of poured-in-place septic tanks must be reinforced.
Select the correct definition
1True 2False
Don't know?
All tanks must have: 2 compartments
All tanks whether pre-manufactured or at least one and one- half (1 1/2) times... "to the width."
constructed on site shall be
constructed so that the length is
__________________________compared
to
the width.
Septic Tanks may be made of: Concrete, Plastic, fiberglass, or other materials as approved by the department.
Tank compartment partitions will Not less than two-thirds or more than three-fourths the Length of the tank from
be located: the Inlet end.
Compartment partitions will be Minimum 25% to a maximum of 50% of the total liquid depth.
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____________________.
Total liquid depth for larger poured-in- 66 inches
place tanks shall have a maximum of
__________inches
True or False: Walls and bottom of True
poured-in-place septic tanks must be
reinforced.
six inch by 6 inch (6"x6") No.10 gage welded steel reinforcing wire OR fibrous
How can a Septic tank be reinforced?
reinforcing material conforming to ASTM specifications for such materials.
using three-eights steel reinforcing rods (rebar) which shall be spaced twelve
How must Tank Lids be Reinforced? 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.
1/
6
, 4/5/25, 6:43 Commercial Septic System Installer Exam |
PM
In general, the tank must be able to 150
withstand a uniform live load of
_______________pounds per square foot
in addition to all loads to which an
underground tank is normally subjected.
True or False: Walls, bottoms, and lids of True
poured-in-place septic tanks should have
a minimum thickness of four inches (4").
Tank lids shall be constructed in one or two,
_______________pieces and shall have readily accessed.
securable, removable access openings
located so that the inlet and outlet
tees can be_________________.
Access opening shall have a minimum of Minimum: 15"
____________and maximum of Maximum: 24"
_____________free space.
Tanks with more than 12 inches of cover 12
must extend access openings to within
_____inches of the ground surface.
All tanks shall be equipped with Four inch (4") PVC, ASTM 3034
______________________rated or
equivalent tees at the inlet and outlet
ends of the tank.
Tees shall be constructed so they extend Min: 25%
into the liquid a minimum of Max: 50%
______________and a maximum of
_____________of the liquid depth of the
tank.
The invert of the outlet tee shall two inches
be located________inches below
the
invert of the inlet tee.
_____________tees shall be equipped with Outlet
an approved effluent filter.
Concrete used for poured-in-place 28 day compressive strength of 4000 pounds per square inch.
or pre-cast septic tanks shall have
a minimum______________.
When pouring concrete, care should be it could damage the integrity of the finished product.
taken to assure such operations are not
done during freezing or other wise
inclement periods because
_________________________________.
the finished poured concrete smooth homogeneous consistency and finish.
product should have what texture
and finish?
True of False: Vibrating the forms or mix True
may be helpful in eliminating "honey
combing" or "bridging" in the finished
product.
Who's responsibility is it to assure the The on-site sewage contractor.
quality of the finished product?
2/
6
