Advanced Sewage Treatment and
Disposal Exam Questions and Answers
What is the normal color of wastewater containing dissolved oxygen? - Answer-Gray
What type of effluent discharge requires a place to store the effluent? - Answer-
Intermittent
Vegetation around evaporation and percolation basins should not be allowed to exceed
what maximum height, in inches? - Answer-10 inches
What is the minimum distance in feet that a shallow well can be located from a sceptic
tank? - Answer-100 feet
Which test should be performed within 30 minutes of taking a sample? - Answer-
Chlorine residual
What type of bacteria requires dissolved oxygen to remain alive? - Answer-Aerobic
Treatment plant influent water should be between what pH values? - Answer-6.5 to 8
When a sceptic tank discharges into a leaching field greater than 500 feet in length, you
should incorporate what component(s) into the system? - Answer-Dosing tank and
siphon
What is the minimum distance in feet that leaching cesspools can be located from each
other? - Answer-20
Volatile solids either burn or evaporate within what temperature range? - Answer-500 to
600 degrees F
Trees should not be allowed to grow within how many feet of wastewater Lagoons? -
Answer-500 feet
Domestic sewage should have what noticeable odor? - Answer-Musty
What is the cheapest operating effluent discharge method? - Answer-Continuous
When a leaching field becomes inoperable, you must consider what option? - Answer-
System replacement
Regardless of size, a septic tank should be inspected at what standard intervals, in
months? - Answer-2
Disposal Exam Questions and Answers
What is the normal color of wastewater containing dissolved oxygen? - Answer-Gray
What type of effluent discharge requires a place to store the effluent? - Answer-
Intermittent
Vegetation around evaporation and percolation basins should not be allowed to exceed
what maximum height, in inches? - Answer-10 inches
What is the minimum distance in feet that a shallow well can be located from a sceptic
tank? - Answer-100 feet
Which test should be performed within 30 minutes of taking a sample? - Answer-
Chlorine residual
What type of bacteria requires dissolved oxygen to remain alive? - Answer-Aerobic
Treatment plant influent water should be between what pH values? - Answer-6.5 to 8
When a sceptic tank discharges into a leaching field greater than 500 feet in length, you
should incorporate what component(s) into the system? - Answer-Dosing tank and
siphon
What is the minimum distance in feet that leaching cesspools can be located from each
other? - Answer-20
Volatile solids either burn or evaporate within what temperature range? - Answer-500 to
600 degrees F
Trees should not be allowed to grow within how many feet of wastewater Lagoons? -
Answer-500 feet
Domestic sewage should have what noticeable odor? - Answer-Musty
What is the cheapest operating effluent discharge method? - Answer-Continuous
When a leaching field becomes inoperable, you must consider what option? - Answer-
System replacement
Regardless of size, a septic tank should be inspected at what standard intervals, in
months? - Answer-2
