INSTALLER'S TEST QUESTIONS AND CORRECT DETAILED
ANSWERS (VERIFIED ANSWERS) ALREADY GRADED A+
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
Ans✓✓✓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 Ans✓✓✓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 Ans✓✓✓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 Ans✓✓✓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 Ans✓✓✓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 Ans✓✓✓c) two times the daily waste water flow
ANSWERS (VERIFIED ANSWERS) ALREADY GRADED A+
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
Ans✓✓✓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 Ans✓✓✓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 Ans✓✓✓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 Ans✓✓✓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 Ans✓✓✓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 Ans✓✓✓c) two times the daily waste water flow
