Page 1 of 23
WV Septic Installer exam ALL QUESTIONS AND
VERIFIED SOLUTIONS LATEST UPDATE THIS
YEAR
QUESTION: What is the required minimum clearance between a septic tank and a private water
well? - ANSWER-50 feet
QUESTION: True or False: A soil absorption system may be installed under a driveway or parking
lot. - ANSWER-False
QUESTION: What is the minimum trench depth allowed for a standard soil absorption system? -
ANSWER-18 inches
QUESTION: What is the maximum trench depth for a standard soil absorption system? -
ANSWER-36 inches
QUESTION: How many inches of gravel must be placed beneath the distribution pipe in a
trench? - ANSWER-6 inches
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, Page 2 of 23
What is the minimum septic tank size required for a single-family dwelling with up to 4
bedrooms in WV? - ANSWER-1,000 gallons
QUESTION: For each bedroom beyond 4, how many gallons must be added to the minimum
septic tank size? - ANSWER-250 gallons
QUESTION: True or False: Metal septic tanks are approved for use in West Virginia. - ANSWER-
False
QUESTION: How many inches of gravel must be placed above the distribution pipe? - ANSWER-
2 inches
QUESTION: True or False: The invert of the septic tank inlet must be at least 2 inches higher
than the outlet invert. - ANSWER-True
2
, Page 3 of 23
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
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
3
WV Septic Installer exam ALL QUESTIONS AND
VERIFIED SOLUTIONS LATEST UPDATE THIS
YEAR
QUESTION: What is the required minimum clearance between a septic tank and a private water
well? - ANSWER-50 feet
QUESTION: True or False: A soil absorption system may be installed under a driveway or parking
lot. - ANSWER-False
QUESTION: What is the minimum trench depth allowed for a standard soil absorption system? -
ANSWER-18 inches
QUESTION: What is the maximum trench depth for a standard soil absorption system? -
ANSWER-36 inches
QUESTION: How many inches of gravel must be placed beneath the distribution pipe in a
trench? - ANSWER-6 inches
1
, Page 2 of 23
What is the minimum septic tank size required for a single-family dwelling with up to 4
bedrooms in WV? - ANSWER-1,000 gallons
QUESTION: For each bedroom beyond 4, how many gallons must be added to the minimum
septic tank size? - ANSWER-250 gallons
QUESTION: True or False: Metal septic tanks are approved for use in West Virginia. - ANSWER-
False
QUESTION: How many inches of gravel must be placed above the distribution pipe? - ANSWER-
2 inches
QUESTION: True or False: The invert of the septic tank inlet must be at least 2 inches higher
than the outlet invert. - ANSWER-True
2
, Page 3 of 23
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
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
3
