New Hampshire Septic System
Installer Exam Most Tested Questions
Collection & Verified Detailed Answers
With Rationales| Tutor Verified
Success Exam) Graded A+
1. What state agency administers New Hampshire's Individual
Sewage Disposal System (ISDS) program?
A. Department of Transportation
B. Department of Agriculture
C. New Hampshire Department of Environmental Services (NHDES)
D. Department of Labor
Rationale: NHDES administers the state's subsurface sewage disposal
regulatory program.
2. Which chapter contains the principal New Hampshire rules
governing subdivisions and individual sewage disposal systems?
A. Env-Dw 500
B. Env-Wq 300
C. Env-Wq 1000
D. Env-Wr 700
Rationale: Env-Wq 1000 is the chapter governing subdivisions and
ISDS requirements.
3. Before constructing an ISDS, what generally must be obtained?
A. A building occupancy certificate
B. Department approval of the ISDS application, plans, and
specifications
,C. A septic pumping receipt
D. A plumbing license only
Rationale: Env-Wq 1003.01 prohibits construction of an ISDS before
the required approval is obtained.
4. Who prepares plans for an ISDS?
A. The excavation contractor
B. The homeowner in every case
C. A permitted designer
D. The septic tank manufacturer
Rationale: ISDS plans are required to be prepared by a permitted
designer.
5. What is the primary function of a septic tank?
A. Disinfect wastewater completely
B. Pump sewage directly into groundwater
C. Provide settling and separation of solids and floatable materials
before effluent reaches the disposal area
D. Increase wastewater temperature
Rationale: The septic tank provides primary treatment by allowing
solids to settle and floatables to separate.
6. What does ISDS stand for?
A. Internal Sewage Drainage Structure
B. Individual Sewage Disposal System
C. Integrated Sewer Distribution System
D. Individual Storm Drain System
Rationale: ISDS is the New Hampshire regulatory term for an
Individual Sewage Disposal System.
7. What is the effluent disposal area commonly abbreviated as?
,A. EWA
B. SDA
C. EDA
D. EPA
Rationale: EDA means Effluent Disposal Area.
8. What is one of the installer's most important responsibilities
when constructing an approved system?
A. Redesign the system in the field
B. Ignore elevations if the tank fits
C. Construct the system according to the approved plans
D. Substitute components without documentation
Rationale: Installation activities must comply with applicable rules
and the approved plans.
9. May an installer routinely change an approved system in the field
without approval?
A. Yes, whenever convenient
B. Yes, if the homeowner agrees
C. Yes, if the change saves money
D. No
Rationale: New Hampshire rules prohibit field waivers for
nonconformance with approved plans.
10. What is the purpose of a construction approval?
A. To authorize only septic pumping
B. To authorize construction of the approved ISDS subject to
applicable requirements
C. To replace the installer permit
D. To authorize subdivision sales
Rationale: Construction approval allows the approved system to be
constructed under the applicable rules.
, 11. Which professional is responsible for preparing approved ISDS
design plans?
A. Septage hauler
B. Excavator
C. Permitted designer
D. Electrician
Rationale: Env-Wq 1003.02 requires ISDS plans to be prepared by a
permitted designer.
12. When may preliminary test pits generally be performed before
subdivision approval?
A. Never
B. When needed to obtain information for the application
C. Only after installation
D. Only after final inspection
Rationale: Preliminary testing such as test pits and surveying may be
performed to develop information needed for an application.
13. What does a test pit primarily help establish?
A. Property taxes
B. Electrical load
C. Subsurface soil and site conditions
D. Plumbing fixture count
Rationale: Test pits provide information about soil horizons,
restrictive layers, groundwater indicators, and other subsurface
conditions.
14. Why is soil evaluation important for an EDA?
A. Soil determines house color
B. Soil determines roof pitch
C. Soil characteristics influence wastewater loading and
Installer Exam Most Tested Questions
Collection & Verified Detailed Answers
With Rationales| Tutor Verified
Success Exam) Graded A+
1. What state agency administers New Hampshire's Individual
Sewage Disposal System (ISDS) program?
A. Department of Transportation
B. Department of Agriculture
C. New Hampshire Department of Environmental Services (NHDES)
D. Department of Labor
Rationale: NHDES administers the state's subsurface sewage disposal
regulatory program.
2. Which chapter contains the principal New Hampshire rules
governing subdivisions and individual sewage disposal systems?
A. Env-Dw 500
B. Env-Wq 300
C. Env-Wq 1000
D. Env-Wr 700
Rationale: Env-Wq 1000 is the chapter governing subdivisions and
ISDS requirements.
3. Before constructing an ISDS, what generally must be obtained?
A. A building occupancy certificate
B. Department approval of the ISDS application, plans, and
specifications
,C. A septic pumping receipt
D. A plumbing license only
Rationale: Env-Wq 1003.01 prohibits construction of an ISDS before
the required approval is obtained.
4. Who prepares plans for an ISDS?
A. The excavation contractor
B. The homeowner in every case
C. A permitted designer
D. The septic tank manufacturer
Rationale: ISDS plans are required to be prepared by a permitted
designer.
5. What is the primary function of a septic tank?
A. Disinfect wastewater completely
B. Pump sewage directly into groundwater
C. Provide settling and separation of solids and floatable materials
before effluent reaches the disposal area
D. Increase wastewater temperature
Rationale: The septic tank provides primary treatment by allowing
solids to settle and floatables to separate.
6. What does ISDS stand for?
A. Internal Sewage Drainage Structure
B. Individual Sewage Disposal System
C. Integrated Sewer Distribution System
D. Individual Storm Drain System
Rationale: ISDS is the New Hampshire regulatory term for an
Individual Sewage Disposal System.
7. What is the effluent disposal area commonly abbreviated as?
,A. EWA
B. SDA
C. EDA
D. EPA
Rationale: EDA means Effluent Disposal Area.
8. What is one of the installer's most important responsibilities
when constructing an approved system?
A. Redesign the system in the field
B. Ignore elevations if the tank fits
C. Construct the system according to the approved plans
D. Substitute components without documentation
Rationale: Installation activities must comply with applicable rules
and the approved plans.
9. May an installer routinely change an approved system in the field
without approval?
A. Yes, whenever convenient
B. Yes, if the homeowner agrees
C. Yes, if the change saves money
D. No
Rationale: New Hampshire rules prohibit field waivers for
nonconformance with approved plans.
10. What is the purpose of a construction approval?
A. To authorize only septic pumping
B. To authorize construction of the approved ISDS subject to
applicable requirements
C. To replace the installer permit
D. To authorize subdivision sales
Rationale: Construction approval allows the approved system to be
constructed under the applicable rules.
, 11. Which professional is responsible for preparing approved ISDS
design plans?
A. Septage hauler
B. Excavator
C. Permitted designer
D. Electrician
Rationale: Env-Wq 1003.02 requires ISDS plans to be prepared by a
permitted designer.
12. When may preliminary test pits generally be performed before
subdivision approval?
A. Never
B. When needed to obtain information for the application
C. Only after installation
D. Only after final inspection
Rationale: Preliminary testing such as test pits and surveying may be
performed to develop information needed for an application.
13. What does a test pit primarily help establish?
A. Property taxes
B. Electrical load
C. Subsurface soil and site conditions
D. Plumbing fixture count
Rationale: Test pits provide information about soil horizons,
restrictive layers, groundwater indicators, and other subsurface
conditions.
14. Why is soil evaluation important for an EDA?
A. Soil determines house color
B. Soil determines roof pitch
C. Soil characteristics influence wastewater loading and
