1 | Page
CT Septic License Exam Questions and
Answers
What are the capacities for each side of a septic tank?
Ans: 2/3 inlet side, 1/3 outlet side
How many inches lower should the outlet be from the inlet in a
septic tank?
Ans: 3"
What information must be present on the outlet side of a septic
tank?
Ans: - Name of manufacturer
- Date manufactured
- Size of tank in gallons
- External load limit
- Warning placard
How many additional gallons per bedroom are required for each
bedroom beyond 3?
Ans: 125 gallons
How many additional gallons per bedroom are required for each
bedroom beyond 4?
Ans: 225 gallons
How far below finished grade can clean out and baffle inspection
manholes be?
Ans: No deeper than 12"
© 2025 All rights reserved
, 2 | Page
Tank riser covers shall be at least _________ lbs,
or_______________________, or _______________________________
Ans: 59 lbs, tank covers shall remain on tank clean outs, a secondary
safety device shall be provided
What are the 3 main functions of a septic tank?
Ans: 1. Removes most of the settleable solids
2. Provides and effluent of relatively uniform physical, chemical and
biological characteristics
3. Provides some reduction in pollution levels in the effluent
Where should perc tests be conducted?
Ans: In primary and reserve septic areas
How many inches maximum should a perc hole be?
Ans: 12"
How many inches of water shall be used for a perc test presoak?
Ans: 12"
How many inches of water shall be used for a perc test?
Ans: 12"
How many consecutive readings shall be taken for a perc test
Ans: 3
Perc test readings are measured to the nearest ______"
Ans: 1/8"
What is the perc rate calculation?
Ans: Time/Reading in inches
No leaching system shall be constructed in areas where:
© 2025 All rights reserved
CT Septic License Exam Questions and
Answers
What are the capacities for each side of a septic tank?
Ans: 2/3 inlet side, 1/3 outlet side
How many inches lower should the outlet be from the inlet in a
septic tank?
Ans: 3"
What information must be present on the outlet side of a septic
tank?
Ans: - Name of manufacturer
- Date manufactured
- Size of tank in gallons
- External load limit
- Warning placard
How many additional gallons per bedroom are required for each
bedroom beyond 3?
Ans: 125 gallons
How many additional gallons per bedroom are required for each
bedroom beyond 4?
Ans: 225 gallons
How far below finished grade can clean out and baffle inspection
manholes be?
Ans: No deeper than 12"
© 2025 All rights reserved
, 2 | Page
Tank riser covers shall be at least _________ lbs,
or_______________________, or _______________________________
Ans: 59 lbs, tank covers shall remain on tank clean outs, a secondary
safety device shall be provided
What are the 3 main functions of a septic tank?
Ans: 1. Removes most of the settleable solids
2. Provides and effluent of relatively uniform physical, chemical and
biological characteristics
3. Provides some reduction in pollution levels in the effluent
Where should perc tests be conducted?
Ans: In primary and reserve septic areas
How many inches maximum should a perc hole be?
Ans: 12"
How many inches of water shall be used for a perc test presoak?
Ans: 12"
How many inches of water shall be used for a perc test?
Ans: 12"
How many consecutive readings shall be taken for a perc test
Ans: 3
Perc test readings are measured to the nearest ______"
Ans: 1/8"
What is the perc rate calculation?
Ans: Time/Reading in inches
No leaching system shall be constructed in areas where:
© 2025 All rights reserved
