New Hampshire Septic System Installer Exam
2026/2027 Newest Evaluated Exam Practice 100
Questions |Original Questions & Answers |Detailed
Rationales |Hinted Complete Exam Prep Graded
A+*Instant Download Pdf*
100 QUESTIONS
TABLE OF CONTENTS
# TOPIC
1 NH Regulations & Permitting
2 Site Evaluation
3 Soil Morphology
4 Percolation & Loading Rates
5 Septic Tanks
6 Distribution Systems
7 Pumps & Controls
8 Installation Practices
9 Inspection & Testing
10 Safety & Maintenance
,Q1
In New Hampshire, the primary administrative rules governing subsurface wastewater disposal
systems are found in:
A) Env-Wq 100
B) Env-Wq 1000 CORRECT
C) Env-Air 200
D) RSA 485-A
Rationale
Env-Wq 1000 contains the NH subsurface wastewater disposal system rules.
Q2
A septic system installer in New Hampshire must generally be certified by:
A) The local police department
B) The NH Department of Environmental Services (NHDES) CORRECT
C) The fire marshal
D) The EPA only
Rationale
NHDES administers installer certification and subsurface system rules.
Q3
Before installing a new septic system, the installer should verify that the project has:
A) A building permit only
B) An approved subsurface system permit from NHDES or local health officer CORRECT
C) A driveway permit
D) A wetland permit only
2
,Rationale
Installation must follow an approved permit and approved plan.
Q4
The primary purpose of a septic tank is to:
A) Treat effluent to drinking water standards
B) Separate solids, scum, and liquid and provide primary treatment CORRECT
C) Store all wastewater indefinitely
D) Pump effluent to the surface
Rationale
The tank separates floatables and settleable solids and allows anaerobic digestion.
Q5
A septic tank should be watertight to prevent:
A) Effluent from entering the tank
B) Groundwater infiltration and effluent exfiltration CORRECT
C) Pump operation
D) Odor release only
Rationale
Watertight tanks prevent groundwater from entering and untreated sewage from leaking out.
Q6
The device that prevents floating scum from leaving the septic tank is called the:
A) Baffle CORRECT
B) Effluent filter
3
, C) Distribution box
D) Pump float
Rationale
Inlet and outlet baffles retain scum and prevent solids from exiting the tank.
Q7
An effluent filter is typically installed:
A) In the distribution box
B) At the outlet of the septic tank CORRECT
C) In the pump chamber only
D) At the end of each lateral
Rationale
Effluent filters capture suspended solids before effluent enters the drainfield.
Q8
A riser on a septic tank is used to:
A) Increase tank volume
B) Provide access to the tank for inspection and pumping without excavation CORRECT
C) Increase pump pressure
D) Reduce odor
Rationale
Risers bring access points to grade for maintenance.
4
2026/2027 Newest Evaluated Exam Practice 100
Questions |Original Questions & Answers |Detailed
Rationales |Hinted Complete Exam Prep Graded
A+*Instant Download Pdf*
100 QUESTIONS
TABLE OF CONTENTS
# TOPIC
1 NH Regulations & Permitting
2 Site Evaluation
3 Soil Morphology
4 Percolation & Loading Rates
5 Septic Tanks
6 Distribution Systems
7 Pumps & Controls
8 Installation Practices
9 Inspection & Testing
10 Safety & Maintenance
,Q1
In New Hampshire, the primary administrative rules governing subsurface wastewater disposal
systems are found in:
A) Env-Wq 100
B) Env-Wq 1000 CORRECT
C) Env-Air 200
D) RSA 485-A
Rationale
Env-Wq 1000 contains the NH subsurface wastewater disposal system rules.
Q2
A septic system installer in New Hampshire must generally be certified by:
A) The local police department
B) The NH Department of Environmental Services (NHDES) CORRECT
C) The fire marshal
D) The EPA only
Rationale
NHDES administers installer certification and subsurface system rules.
Q3
Before installing a new septic system, the installer should verify that the project has:
A) A building permit only
B) An approved subsurface system permit from NHDES or local health officer CORRECT
C) A driveway permit
D) A wetland permit only
2
,Rationale
Installation must follow an approved permit and approved plan.
Q4
The primary purpose of a septic tank is to:
A) Treat effluent to drinking water standards
B) Separate solids, scum, and liquid and provide primary treatment CORRECT
C) Store all wastewater indefinitely
D) Pump effluent to the surface
Rationale
The tank separates floatables and settleable solids and allows anaerobic digestion.
Q5
A septic tank should be watertight to prevent:
A) Effluent from entering the tank
B) Groundwater infiltration and effluent exfiltration CORRECT
C) Pump operation
D) Odor release only
Rationale
Watertight tanks prevent groundwater from entering and untreated sewage from leaking out.
Q6
The device that prevents floating scum from leaving the septic tank is called the:
A) Baffle CORRECT
B) Effluent filter
3
, C) Distribution box
D) Pump float
Rationale
Inlet and outlet baffles retain scum and prevent solids from exiting the tank.
Q7
An effluent filter is typically installed:
A) In the distribution box
B) At the outlet of the septic tank CORRECT
C) In the pump chamber only
D) At the end of each lateral
Rationale
Effluent filters capture suspended solids before effluent enters the drainfield.
Q8
A riser on a septic tank is used to:
A) Increase tank volume
B) Provide access to the tank for inspection and pumping without excavation CORRECT
C) Increase pump pressure
D) Reduce odor
Rationale
Risers bring access points to grade for maintenance.
4
