New Hampshire Septic Installer Exam 2 – System Installation
& Construction – 300 Real Exam Questions And Correct
Detailed Answers (Verified Answers) With Rationales
Already Graded A+
1. What is the minimum required depth from the bottom of an EDA to bedrock or any other
impermeable substratum?
A) 2 feet
B) 3 feet
C) 4 feet
D) 5 feet
Answer: C
Rationale: Env-Wq 1014.07 requires the bottom of an EDA to be at least 4 feet above bedrock or
impermeable substratum.
2. What is the minimum separation between the EDA bed bottom and the seasonal high water
table (SHWT) for a standard stone-and-pipe system?
A) 1 foot
B) 2 feet
C) 3 feet
D) 4 feet
Answer: B
Rationale: New Hampshire requires at least 2 feet of separation between the bed bottom and the SHWT.
3. Before excavation, what must be clearly marked on the site?
A) Only the tank location
B) All underground utilities
C) Only the EDA
,D) Only the well
Answer: B
Rationale: Call 811 before digging to mark all underground utilities to prevent damage and injury.
4. What is the minimum setback from an EDA bed to a property boundary?
A) 5 feet
B) 10 feet
C) 15 feet
D) 20 feet
Answer: B
Rationale: Table 1008-2 specifies a 10-foot minimum from the EDA bed to a property boundary.
5. What is the minimum setback from a septic tank to a property boundary?
A) 5 feet
B) 5 feet
C) 10 feet
D) 15 feet
Answer: B
Rationale: Table 1008-2 specifies a 5-foot minimum from a septic tank to a property boundary.
6. What is the minimum setback from an EDA bed to a water supply well for a home with up to 5
bedrooms?
A) 50 feet
B) 75 feet
C) 100 feet
D) 150 feet
Answer: B
Rationale: RSA 485-A:30-b requires a 75-foot setback from wells to septic systems for up to 5 bedrooms.
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,7. What is the minimum setback from an EDA bed to surface water?
A) 50 feet
B) 75 feet
C) 100 feet
D) 125 feet
Answer: B
Rationale: Table 1008-2 specifies a 75-foot minimum from the EDA bed to surface water.
8. What is the minimum design flow per bedroom for residential systems?
A) 100 GPD
B) 150 GPD
C) 200 GPD
D) 250 GPD
Answer: B
Rationale: Env-Wq 1008.02 sets a minimum design flow of 150 GPD per bedroom.
9. What is the minimum septic tank size for a 3-bedroom home?
A) 750 gallons
B) 1,000 gallons
C) 1,250 gallons
D) 1,500 gallons
Answer: B
Rationale: Env-Wq 1010.01 requires a minimum liquid capacity of 1,000 gallons for a 3-bedroom home.
10. What is the minimum septic tank size for a 4-bedroom home?
A) 1,000 gallons
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, B) 1,250 gallons
C) 1,500 gallons
D) 1,750 gallons
Answer: B
Rationale: 1,000 gallons for first 3 bedrooms + 250 gallons for 4th bedroom = 1,250 gallons.
11. What is the minimum septic tank size for a 5-bedroom home?
A) 1,250 gallons
B) 1,500 gallons
C) 1,750 gallons
D) 2,000 gallons
Answer: B
Rationale: 1,000 gallons for first 3 bedrooms + 250 gallons per additional bedroom × 2 = 1,500 gallons.
12. What is the required slope for an effluent conduit?
A) 0% (level)
B) 0.1% to 0.3%
C) 1% to 2%
D) 5%
Answer: B
Rationale: Effluent conduits must be level or have a slight slope to ensure even distribution.
13. What is the minimum required separation between the EDA bed bottom and bedrock for a
mound system?
A) 1 foot
B) 2 feet
C) 3 feet
D) 4 feet
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& Construction – 300 Real Exam Questions And Correct
Detailed Answers (Verified Answers) With Rationales
Already Graded A+
1. What is the minimum required depth from the bottom of an EDA to bedrock or any other
impermeable substratum?
A) 2 feet
B) 3 feet
C) 4 feet
D) 5 feet
Answer: C
Rationale: Env-Wq 1014.07 requires the bottom of an EDA to be at least 4 feet above bedrock or
impermeable substratum.
2. What is the minimum separation between the EDA bed bottom and the seasonal high water
table (SHWT) for a standard stone-and-pipe system?
A) 1 foot
B) 2 feet
C) 3 feet
D) 4 feet
Answer: B
Rationale: New Hampshire requires at least 2 feet of separation between the bed bottom and the SHWT.
3. Before excavation, what must be clearly marked on the site?
A) Only the tank location
B) All underground utilities
C) Only the EDA
,D) Only the well
Answer: B
Rationale: Call 811 before digging to mark all underground utilities to prevent damage and injury.
4. What is the minimum setback from an EDA bed to a property boundary?
A) 5 feet
B) 10 feet
C) 15 feet
D) 20 feet
Answer: B
Rationale: Table 1008-2 specifies a 10-foot minimum from the EDA bed to a property boundary.
5. What is the minimum setback from a septic tank to a property boundary?
A) 5 feet
B) 5 feet
C) 10 feet
D) 15 feet
Answer: B
Rationale: Table 1008-2 specifies a 5-foot minimum from a septic tank to a property boundary.
6. What is the minimum setback from an EDA bed to a water supply well for a home with up to 5
bedrooms?
A) 50 feet
B) 75 feet
C) 100 feet
D) 150 feet
Answer: B
Rationale: RSA 485-A:30-b requires a 75-foot setback from wells to septic systems for up to 5 bedrooms.
2
,7. What is the minimum setback from an EDA bed to surface water?
A) 50 feet
B) 75 feet
C) 100 feet
D) 125 feet
Answer: B
Rationale: Table 1008-2 specifies a 75-foot minimum from the EDA bed to surface water.
8. What is the minimum design flow per bedroom for residential systems?
A) 100 GPD
B) 150 GPD
C) 200 GPD
D) 250 GPD
Answer: B
Rationale: Env-Wq 1008.02 sets a minimum design flow of 150 GPD per bedroom.
9. What is the minimum septic tank size for a 3-bedroom home?
A) 750 gallons
B) 1,000 gallons
C) 1,250 gallons
D) 1,500 gallons
Answer: B
Rationale: Env-Wq 1010.01 requires a minimum liquid capacity of 1,000 gallons for a 3-bedroom home.
10. What is the minimum septic tank size for a 4-bedroom home?
A) 1,000 gallons
3
, B) 1,250 gallons
C) 1,500 gallons
D) 1,750 gallons
Answer: B
Rationale: 1,000 gallons for first 3 bedrooms + 250 gallons for 4th bedroom = 1,250 gallons.
11. What is the minimum septic tank size for a 5-bedroom home?
A) 1,250 gallons
B) 1,500 gallons
C) 1,750 gallons
D) 2,000 gallons
Answer: B
Rationale: 1,000 gallons for first 3 bedrooms + 250 gallons per additional bedroom × 2 = 1,500 gallons.
12. What is the required slope for an effluent conduit?
A) 0% (level)
B) 0.1% to 0.3%
C) 1% to 2%
D) 5%
Answer: B
Rationale: Effluent conduits must be level or have a slight slope to ensure even distribution.
13. What is the minimum required separation between the EDA bed bottom and bedrock for a
mound system?
A) 1 foot
B) 2 feet
C) 3 feet
D) 4 feet
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