SEPTIC SYSTEM LISENCE FINAL EXAM QUESTIONS WITH
ANSWERS GRADED A+ 2025/2026
maximum length for individual conventional lateral trench is
a. 100 feet
b. 200 feet
c. no maximum limit
d. 70 feet - b. 200 feet
the appropriate minimum spacing of conventional rock trench is
a. 5 feet on centers
b. 8 feet side wall to side wall
c. 8 feet on centers - c. 8 feet on centers
the appropriate minimum spacing of low pressure pipe system is
a. 5 feet on centers
b. 8 feet side wall to side wall
c. 8 feet on centers - a. 5 feet on centers
the appropriate minimum spacing for lateral beds is
a. 5 feet on centers
b. 8 feet side wall to side wall
c. 8 feet on centers - b. 8 feet side wall to side wall
the setback distance from lateral trench for wells is
a. 25 feet
b. 50 feet
c. 70 feet - c. 70 feet
the setback distance from lateral trench for cistern is
a. 25 feet
b. 50 feet
c. 70 feet - c. 70 feet
the setback distance from lateral trench for streams is
a. 25 feet
b. 50 feet
c. 70 feet - a. 25 feet
the setback distance from lateral trench for lakes is
a. 25 feet
b. 50 feet
c. 70 feet - b. 50 feet
back filling of system is permitted prior to final inspection providing inspections ports are
placed in lateral trenches - false
, soil fill added to shallow installed system must be of group three texture or better - true
certified installer not responsible for backfilling or finished grading over system if builder
does work - false
when fill soil is added to lateral field area the sod layer must not be disturbed - false
fill soil is tampered how far below lateral field on down slope side?
a. 5 ft
b. 10 ft
c. 15 ft
d. 25 ft - c. 15 ft
access must be provided within 24 inches of surface grade to outlet end man hole of
septic tank - false
distribution boxes shall be installed level with all connections rendered watertight - true
grease taps required for all establishments that manufacture or prepare food - true
under gravity flow uses SDR35, schedule 40, and 1500 pound crush PVC pipe is
approved for use between distribution box + lateral trenches or beds - false
pipe connections between distribution box + lateral trenches do not need to be
watertight - false
equal flow type distribution boxes shall be placed on stable base - true
if certified installer intentionally misrepresents the number of bedrooms on application
for site evaluation. what actions can local inspector take?
a. suspend installer certification
b. revoke installer certification
c. file criminal charges against installer
d. any of above - d. any of above
outlet pips from equal flow type distribution box shall be water level to provide equal
flow to all laterals - true
when filling out an installers affidavit, elevations should be on-shot + recorded at?
a. beginning at trench only
b. middle of trench only
c. end of trench only
d. beginning, middle + end of trench - d. beginning, middle + end of trench
when applying for site evaluation you must
ANSWERS GRADED A+ 2025/2026
maximum length for individual conventional lateral trench is
a. 100 feet
b. 200 feet
c. no maximum limit
d. 70 feet - b. 200 feet
the appropriate minimum spacing of conventional rock trench is
a. 5 feet on centers
b. 8 feet side wall to side wall
c. 8 feet on centers - c. 8 feet on centers
the appropriate minimum spacing of low pressure pipe system is
a. 5 feet on centers
b. 8 feet side wall to side wall
c. 8 feet on centers - a. 5 feet on centers
the appropriate minimum spacing for lateral beds is
a. 5 feet on centers
b. 8 feet side wall to side wall
c. 8 feet on centers - b. 8 feet side wall to side wall
the setback distance from lateral trench for wells is
a. 25 feet
b. 50 feet
c. 70 feet - c. 70 feet
the setback distance from lateral trench for cistern is
a. 25 feet
b. 50 feet
c. 70 feet - c. 70 feet
the setback distance from lateral trench for streams is
a. 25 feet
b. 50 feet
c. 70 feet - a. 25 feet
the setback distance from lateral trench for lakes is
a. 25 feet
b. 50 feet
c. 70 feet - b. 50 feet
back filling of system is permitted prior to final inspection providing inspections ports are
placed in lateral trenches - false
, soil fill added to shallow installed system must be of group three texture or better - true
certified installer not responsible for backfilling or finished grading over system if builder
does work - false
when fill soil is added to lateral field area the sod layer must not be disturbed - false
fill soil is tampered how far below lateral field on down slope side?
a. 5 ft
b. 10 ft
c. 15 ft
d. 25 ft - c. 15 ft
access must be provided within 24 inches of surface grade to outlet end man hole of
septic tank - false
distribution boxes shall be installed level with all connections rendered watertight - true
grease taps required for all establishments that manufacture or prepare food - true
under gravity flow uses SDR35, schedule 40, and 1500 pound crush PVC pipe is
approved for use between distribution box + lateral trenches or beds - false
pipe connections between distribution box + lateral trenches do not need to be
watertight - false
equal flow type distribution boxes shall be placed on stable base - true
if certified installer intentionally misrepresents the number of bedrooms on application
for site evaluation. what actions can local inspector take?
a. suspend installer certification
b. revoke installer certification
c. file criminal charges against installer
d. any of above - d. any of above
outlet pips from equal flow type distribution box shall be water level to provide equal
flow to all laterals - true
when filling out an installers affidavit, elevations should be on-shot + recorded at?
a. beginning at trench only
b. middle of trench only
c. end of trench only
d. beginning, middle + end of trench - d. beginning, middle + end of trench
when applying for site evaluation you must
