Installer's Test questions with verified detailed answers ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//||
The gravel in the disposal field trenches shall not be covered with which of the following?
||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//||
a) untreated building paper
||\\//|| ||\\//|| ||\\//||
b) 6-mil black plastic
||\\//|| ||\\//|| ||\\//||
c) 2 inch layer of straw
||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//||
d) Other material determined equivalent by the Commissioner - correct answer✔✔b) 6-mil
||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//||
black plastic ||\\//||
The soil area required for the installation of a conventional substitute system is?
||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//||
a) 30% less than for a conventional system
||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//||
b) a larger soil footprint than a conventional system
||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//||
c) the same soil footprint as a conventional system - correct answer✔✔c) The same soil
||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//||
footprint as a conventional system ||\\//|| ||\\//|| ||\\//|| ||\\//||
If the permit specifies that the system is to be installed 24 inches deep, this means?
||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//||
a) 24 inches from the surface of the ground to the top of the gravel
||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//||
b) 24 inch from the top of the ground to the bottom of the trench and lines installed on
||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//||
contour
c) trench depth may vary between 24 to 30 inches - correct answer✔✔b) 24 inches from the
||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//||
top of the ground to the bottom of the trench and lines installed on contour
||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//||
In soils that are approved by percolation tests or evaluated to have absorption rates higher
||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//||
than 60 MPI LDGP systems require? ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//||
a) installation in a 24 inch trench with gravel back fill leveled to the top of the LDGP
||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//||
b) installation in a 24 inch trench with a quality top soil backfill
||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//||
, c) installation in an 18 inch trench with gravel backfill to the top of the LDGP
||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//||
d) installation in a 24 inch trench with gravel backfill to 2 inches above LDGP - correct
||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//||
answer✔✔a) installation in a 24 inch trench with gravel back fill leveled to the top of the ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//||
LDGP
The maximum trench width allowed for a 24 inch wide chamber product is
||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//||
a) 24 inches
||\\//|| ||\\//||
b) 30 inches
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c) 34 inches
||\\//|| ||\\//||
d) 36 inches - correct answer✔✔b) 30 inches
||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//||
What is the proper volume of a dosing (pump) chamber?
||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//||
a) same as the septic tank
||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//||
b) 1000 gallons
||\\//|| ||\\//||
c) two times the daily waste water flow
||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//||
d) 900 gallons - correct answer✔✔c) two times the daily waste water flow
||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//||
When installing conventional and conventional substitute systems
||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//||
a) disposal field trenches shall follow the contour of the ground surface
||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//||
b) a minimum of 6 ft of undisturbed earth shall be required between trenches
||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//||
c) trenches shall not be excavated when the soil is wet enough to smear or compact
||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//||
d) all of the above - correct answer✔✔d) all the above
||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//||
An installer may call for a final inspection on a system that utilizes a pumped dosing
||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//||
system after? ||\\//||
a) the field lines have been installed
||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//||
The gravel in the disposal field trenches shall not be covered with which of the following?
||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//||
a) untreated building paper
||\\//|| ||\\//|| ||\\//||
b) 6-mil black plastic
||\\//|| ||\\//|| ||\\//||
c) 2 inch layer of straw
||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//||
d) Other material determined equivalent by the Commissioner - correct answer✔✔b) 6-mil
||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//||
black plastic ||\\//||
The soil area required for the installation of a conventional substitute system is?
||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//||
a) 30% less than for a conventional system
||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//||
b) a larger soil footprint than a conventional system
||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//||
c) the same soil footprint as a conventional system - correct answer✔✔c) The same soil
||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//||
footprint as a conventional system ||\\//|| ||\\//|| ||\\//|| ||\\//||
If the permit specifies that the system is to be installed 24 inches deep, this means?
||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//||
a) 24 inches from the surface of the ground to the top of the gravel
||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//||
b) 24 inch from the top of the ground to the bottom of the trench and lines installed on
||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//||
contour
c) trench depth may vary between 24 to 30 inches - correct answer✔✔b) 24 inches from the
||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//||
top of the ground to the bottom of the trench and lines installed on contour
||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//||
In soils that are approved by percolation tests or evaluated to have absorption rates higher
||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//||
than 60 MPI LDGP systems require? ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//||
a) installation in a 24 inch trench with gravel back fill leveled to the top of the LDGP
||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//||
b) installation in a 24 inch trench with a quality top soil backfill
||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//||
, c) installation in an 18 inch trench with gravel backfill to the top of the LDGP
||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//||
d) installation in a 24 inch trench with gravel backfill to 2 inches above LDGP - correct
||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//||
answer✔✔a) installation in a 24 inch trench with gravel back fill leveled to the top of the ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//||
LDGP
The maximum trench width allowed for a 24 inch wide chamber product is
||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//||
a) 24 inches
||\\//|| ||\\//||
b) 30 inches
||\\//|| ||\\//||
c) 34 inches
||\\//|| ||\\//||
d) 36 inches - correct answer✔✔b) 30 inches
||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//||
What is the proper volume of a dosing (pump) chamber?
||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//||
a) same as the septic tank
||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//||
b) 1000 gallons
||\\//|| ||\\//||
c) two times the daily waste water flow
||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//||
d) 900 gallons - correct answer✔✔c) two times the daily waste water flow
||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//||
When installing conventional and conventional substitute systems
||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//||
a) disposal field trenches shall follow the contour of the ground surface
||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//||
b) a minimum of 6 ft of undisturbed earth shall be required between trenches
||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//||
c) trenches shall not be excavated when the soil is wet enough to smear or compact
||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//||
d) all of the above - correct answer✔✔d) all the above
||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//||
An installer may call for a final inspection on a system that utilizes a pumped dosing
||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//||
system after? ||\\//||
a) the field lines have been installed
||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//||
