INSTALLER'S TEST QUESTIONS AND ANSWERS 2025/2026

INSTALLER'S TEST QUESTIONS AND ANSWERS 2025/2026 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 answers-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 answers-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 answers-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 answers-a) installation in a 24 inch trench with gravel back fill leveled to the top of the LDGP