SEPTIC LICENSE FINAL TEST 2026 QUESTIONS WITH
CORRECT ANSWERS GRADED A+
● Conventional System. Answer: Standard gravity-flow septic system with a septic tank and
drain field
● Low-Pressure Dosing System. Answer: System using a pump to distribute effluent evenly
across the drain field
● Pressure Distribution. Answer: Delivering effluent under pressure through small holes for
even absorption
● Aerobic Treatment Unit. Answer: System using oxygen and aerobic bacteria to achieve
higher treatment levels
● ATU. Answer: Aerobic Treatment Unit producing higher-quality effluent than conventional
septic tanks
● Spray Irrigation System. Answer: Dispersal system spraying treated effluent over a
designated surface area
● Drip Irrigation System. Answer: Subsurface dispersal system delivering treated effluent
directly to the root zone
● Surface Application. Answer: Dispersal of treated effluent on the ground surface
● Subsurface Drip System. Answer: Drip lines buried in soil delivering effluent below grade
● Mound System. Answer: Elevated drain field built above grade when site conditions are
unsuitable for conventional installation
● Elevated Sand Mound. Answer: Drain field installed on a raised earthen mound to provide
required soil depth
● Cluster System. Answer: Shared OSSF serving multiple properties
● Alternative System. Answer: Any OSSF design not conforming to conventional septic
system standards
CORRECT ANSWERS GRADED A+
● Conventional System. Answer: Standard gravity-flow septic system with a septic tank and
drain field
● Low-Pressure Dosing System. Answer: System using a pump to distribute effluent evenly
across the drain field
● Pressure Distribution. Answer: Delivering effluent under pressure through small holes for
even absorption
● Aerobic Treatment Unit. Answer: System using oxygen and aerobic bacteria to achieve
higher treatment levels
● ATU. Answer: Aerobic Treatment Unit producing higher-quality effluent than conventional
septic tanks
● Spray Irrigation System. Answer: Dispersal system spraying treated effluent over a
designated surface area
● Drip Irrigation System. Answer: Subsurface dispersal system delivering treated effluent
directly to the root zone
● Surface Application. Answer: Dispersal of treated effluent on the ground surface
● Subsurface Drip System. Answer: Drip lines buried in soil delivering effluent below grade
● Mound System. Answer: Elevated drain field built above grade when site conditions are
unsuitable for conventional installation
● Elevated Sand Mound. Answer: Drain field installed on a raised earthen mound to provide
required soil depth
● Cluster System. Answer: Shared OSSF serving multiple properties
● Alternative System. Answer: Any OSSF design not conforming to conventional septic
system standards
