1|Page
OSSF DR TEST PRACTICE QUESTIONS
WITH ANSWERS
The _______ is responsible for reviewing permit applications, site
evaluations, planning materials, and conducting inspections of OSSFs -
correct-answer -DR (designated representative)
_______ adopted the current OSSF Rules in 1997 and revised them
several times - correct-answer -TCEQ
Class II soils include the USDA classes of _________ and __________. -
correct-answer -sandy loam, loam
The _________ is a tool to graphically delineate soil textural classes. -
correct-answer -USDA soil textural triangle
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List the two unsuitable types of soil structure or structural condition. -
correct-answer -Platy (like a stack of plates)
Massive ( can't break it up, huge pieces)
A soil color pattern of orange and brown on a background of gray or
bluish color is called - correct-answer -mottling
The ideal soil environment for organic effluent decomposition is one of
good ______ and ________. - correct-answer -soil air, soil water
balance
Soil associations are _______ units which encompass broad areas with
similar patterns of __________, __________, __________, and
_________. - correct-answer -soil. soil profiles, vegetation, relief, and
drainage
The county ____________________ is an essential tool for conducting a
site evaluation but does not take the place of the on-site field soil
evaluation. - correct-answer -soil survey
,3|Page
Sites with greater than ____ percent slope are unsuitable. - correct-
answer -30
A minimum lot size of _______ acre is required for subdivisions serviced
by _________ water. The minimum size is ______ acre for those
serviced by ___________. - correct-answer -0.5, public, 1, private well
Soil evaluation pits shall be excavated to a depth of _____ inches below
the proposed _________ or to a _________ horizon, whichever is
shallower. - correct-answer -24, drainfield, restrictive
Any soil profile with an indication of high-water table within _____
inches below the proposed drainfield shall be considered
_____________ for a standard drainfield. - correct-answer -24,
unsuitable
, 4|Page
The ___________ and ____________ of each soil horizon should be
measured from ________ to _________ and recorded in the soil
evaluation report. - correct-answer -sequence, depth, top, bottom
The depth of soil classified as suitable with respect to texture shall be at
least ____ inches below the bottom of the proposed excavation for a
standard drainfield. - correct-answer -24
If a soil with no gravel will not form a ribbon in the texture-by-feel
method, it is classified as ______ or ______, class ____. - correct-
answer -sand or loamy sand, Ib
If a soil forms a ribbon greater than 2 inches, and neither smooth or
gritty consistency predominates, the soil is _______, class _____. -
correct-answer -clay, IV
Soil suitability factors include: _________, ________, and _________. -
correct-answer -soil texture, soil depth, and restrictive horizon
OSSF DR TEST PRACTICE QUESTIONS
WITH ANSWERS
The _______ is responsible for reviewing permit applications, site
evaluations, planning materials, and conducting inspections of OSSFs -
correct-answer -DR (designated representative)
_______ adopted the current OSSF Rules in 1997 and revised them
several times - correct-answer -TCEQ
Class II soils include the USDA classes of _________ and __________. -
correct-answer -sandy loam, loam
The _________ is a tool to graphically delineate soil textural classes. -
correct-answer -USDA soil textural triangle
,2|Page
List the two unsuitable types of soil structure or structural condition. -
correct-answer -Platy (like a stack of plates)
Massive ( can't break it up, huge pieces)
A soil color pattern of orange and brown on a background of gray or
bluish color is called - correct-answer -mottling
The ideal soil environment for organic effluent decomposition is one of
good ______ and ________. - correct-answer -soil air, soil water
balance
Soil associations are _______ units which encompass broad areas with
similar patterns of __________, __________, __________, and
_________. - correct-answer -soil. soil profiles, vegetation, relief, and
drainage
The county ____________________ is an essential tool for conducting a
site evaluation but does not take the place of the on-site field soil
evaluation. - correct-answer -soil survey
,3|Page
Sites with greater than ____ percent slope are unsuitable. - correct-
answer -30
A minimum lot size of _______ acre is required for subdivisions serviced
by _________ water. The minimum size is ______ acre for those
serviced by ___________. - correct-answer -0.5, public, 1, private well
Soil evaluation pits shall be excavated to a depth of _____ inches below
the proposed _________ or to a _________ horizon, whichever is
shallower. - correct-answer -24, drainfield, restrictive
Any soil profile with an indication of high-water table within _____
inches below the proposed drainfield shall be considered
_____________ for a standard drainfield. - correct-answer -24,
unsuitable
, 4|Page
The ___________ and ____________ of each soil horizon should be
measured from ________ to _________ and recorded in the soil
evaluation report. - correct-answer -sequence, depth, top, bottom
The depth of soil classified as suitable with respect to texture shall be at
least ____ inches below the bottom of the proposed excavation for a
standard drainfield. - correct-answer -24
If a soil with no gravel will not form a ribbon in the texture-by-feel
method, it is classified as ______ or ______, class ____. - correct-
answer -sand or loamy sand, Ib
If a soil forms a ribbon greater than 2 inches, and neither smooth or
gritty consistency predominates, the soil is _______, class _____. -
correct-answer -clay, IV
Soil suitability factors include: _________, ________, and _________. -
correct-answer -soil texture, soil depth, and restrictive horizon
