Page 1 of 23
WV Septic Installer Test all QUESTIONS AND
CORRECT ANSWERS LATEST UPDATE THIS YEAR
NEW!!
QUESTION: Which type of distribution system is required on sloping ground? - ANSWER-Serial
distribution
QUESTION: At what slope percentage are soil absorption systems prohibited? - ANSWER-More
than 25%
QUESTION: True or False: Effluent from an upslope trench must flow to the downslope trench
in serial distribution. - ANSWER-True
QUESTION: What is the minimum horizontal separation distance between a drain field and a
stream? - ANSWER-20 feet
1
,Page 2 of 23
QUESTION: What is the minimum horizontal separation distance between a soil absorption
system and a water well? - ANSWER-100 feet
QUESTION: True or False: Percolation rates slower than 90 minutes per inch are acceptable for
standard absorption fields. - ANSWER-False
QUESTION: How many percolation test holes are required across an absorption field site? -
ANSWER-At least 4
QUESTION: How deep should percolation test holes be? - ANSWER-Depth of the proposed
absorption trench (6-8 inches diameter)
QUESTION: What is placed at the bottom of each perc test hole before filling with water? -
ANSWER-2 inches of gravel
QUESTION: How long must a perc test hole be pre-soaked before timing absorption rate? -
ANSWER-At least 4 hours
2
, Page 3 of 23
QUESTION: True or False: A nail or measuring device should be placed 6 inches above the gravel
level in a perc test hole. - ANSWER-True
QUESTION: The average rate of fall for percolation is calculated by dividing total minutes by
what number? - ANSWER-6
QUESTION: True or False: A minimum of 3 feet of soil must exist between the trench bottom
and seasonal groundwater or bedrock. - ANSWER-True
QUESTION: What is the minimum lot size required when public water is available but no public
sewer is available (post-1970 lot)? - ANSWER-10,000 square feet
QUESTION: What is the minimum lot size required when no public water or sewer is available
(post-1970 lot)? - ANSWER-20,000 square feet
What is the minimum septic tank size required for a single-family dwelling with up to 4
bedrooms in WV? - ANSWER-1,000 gallons
3
WV Septic Installer Test all QUESTIONS AND
CORRECT ANSWERS LATEST UPDATE THIS YEAR
NEW!!
QUESTION: Which type of distribution system is required on sloping ground? - ANSWER-Serial
distribution
QUESTION: At what slope percentage are soil absorption systems prohibited? - ANSWER-More
than 25%
QUESTION: True or False: Effluent from an upslope trench must flow to the downslope trench
in serial distribution. - ANSWER-True
QUESTION: What is the minimum horizontal separation distance between a drain field and a
stream? - ANSWER-20 feet
1
,Page 2 of 23
QUESTION: What is the minimum horizontal separation distance between a soil absorption
system and a water well? - ANSWER-100 feet
QUESTION: True or False: Percolation rates slower than 90 minutes per inch are acceptable for
standard absorption fields. - ANSWER-False
QUESTION: How many percolation test holes are required across an absorption field site? -
ANSWER-At least 4
QUESTION: How deep should percolation test holes be? - ANSWER-Depth of the proposed
absorption trench (6-8 inches diameter)
QUESTION: What is placed at the bottom of each perc test hole before filling with water? -
ANSWER-2 inches of gravel
QUESTION: How long must a perc test hole be pre-soaked before timing absorption rate? -
ANSWER-At least 4 hours
2
, Page 3 of 23
QUESTION: True or False: A nail or measuring device should be placed 6 inches above the gravel
level in a perc test hole. - ANSWER-True
QUESTION: The average rate of fall for percolation is calculated by dividing total minutes by
what number? - ANSWER-6
QUESTION: True or False: A minimum of 3 feet of soil must exist between the trench bottom
and seasonal groundwater or bedrock. - ANSWER-True
QUESTION: What is the minimum lot size required when public water is available but no public
sewer is available (post-1970 lot)? - ANSWER-10,000 square feet
QUESTION: What is the minimum lot size required when no public water or sewer is available
(post-1970 lot)? - ANSWER-20,000 square feet
What is the minimum septic tank size required for a single-family dwelling with up to 4
bedrooms in WV? - ANSWER-1,000 gallons
3
