CRRN PRACTICE TEST 2026 QUESTIONS WITH
ANSWERS GRADED A+
▶ A trench requires 430 cubic feet of gravel. How many cubic yards must
be purchased?? Answer:16 cubic yards
▶ A septic tank had a working volume of 31 cubic feet. How many gallons
does this septic tank hold?? Answer:approx. 232 gals
▶ The area of a lot is 20,076 square feet. What is the area of this lot in
acres?? Answer:0.46 acres
▶ A trench measures 30 inches wide. How wide is the trench in feet??
Answer:2.5'
▶ A particular hazard that OSSF installers face that most construction
workers do not is _______.? Answer:infectious waterborne diseases
▶ List the equipment and procedures to protect a work site.? Answer:signs,
regulated speed, cones, barricade, high level flags
▶ Who can legally install a septic tank followed by a low-pressure dosing
drain field at a rental house?? Answer:Installer II
▶ Planning materials for an OSSF utilizing secondary treatment must be
prepared by a/an? Answer:PE (professional engineer) or RS (registered
sanitarian)
▶ Penalties for violating the laws, rules, or regulations covering OSSF can
be imposed under what headings? Answer:criminal, injunction,
administrative
▶ List the 9 steps of the permitting process? Answer:1) Site Evaluations
2) Selection of an OSSF
3) System must be planned
4) Professional designer (PE or RS) submits planning materials
5) Permit application and planning materials must be prepared and
submitted
,6) The application and planning materials are reviewed by permitting
authority
7) Authorization or permit to construct (ATC) must be granted by permitting
authority BEFORE construction can begin
8) Construction begins after ATC recieved.
9) System must be inspected by permitting agency.
10) Notice of approval (NOA) and permit or license to operate will be
issued by the permitting agency when completed System has passed all
inspections.
▶ New OSSF licenses are issued for a term of ______. An individual must
complete _______ of TCEQ-approved continuing education courses in
order to renew license.? Answer:3 years, 24 hours
▶ What is needed to pre-qualify for an exam?? Answer:submitting an
application and notarized experience statements, paying class and
application fees, and successfully completing the appropriate training
course
▶ Individuals working as a __________ or in any capacity for an OSSF
___________ cannot work as an Installer, Designer for a fee, or private
Site Evaluator within the jurisdiction of the permitting authority.?
Answer:Designated representative (DR), permitting authority
▶ List the OSSF licenses that require previous experience?
Answer:installer II, Site evaluator (SE), and Maintenance Provider (MP)
▶ An individual who visits a site and conducts soil evaluations and a site
survey is a(n) __________.? Answer:site evaulator
▶ An individual who holds a valid license from the TCEQ and who is
compensated by another individual to construct, install, alter, or repair an
OSSF is a(n) _________.? Answer:installer
▶ The _______ is responsible for reviewing permit applications, site
evaluations, planning materials, and conducting inspections of OSSFs?
Answer:DR (designated representative)
▶ _______ adopted the current OSSF Rules in 1997 and revised them
several times? Answer:TCEQ
, ▶ Class II soils include the USDA classes of _________ and
__________.? Answer:sandy loam, loam
▶ The _________ is a tool to graphically delineate soil textural classes.?
Answer:USDA soil textural triangle
▶ List the two unsuitable types of soil structure or structural condition.?
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? Answer:mottling
▶ The ideal soil environment for organic effluent decomposition is one of
good ______ and ________.? Answer:soil air, soil water balance
▶ Soil associations are _______ units which encompass broad areas with
similar patterns of __________, __________, __________, and
_________.? 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.? Answer:soil survey
▶ Sites with greater than ____ percent slope are unsuitable.? Answer:30
▶ A minimum lot size of _______ acre is required for subdivisions serviced
by _________ water. The minimum size is ______ acre for those serviced
by ___________.? 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.? 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.? Answer:24, unsuitable
ANSWERS GRADED A+
▶ A trench requires 430 cubic feet of gravel. How many cubic yards must
be purchased?? Answer:16 cubic yards
▶ A septic tank had a working volume of 31 cubic feet. How many gallons
does this septic tank hold?? Answer:approx. 232 gals
▶ The area of a lot is 20,076 square feet. What is the area of this lot in
acres?? Answer:0.46 acres
▶ A trench measures 30 inches wide. How wide is the trench in feet??
Answer:2.5'
▶ A particular hazard that OSSF installers face that most construction
workers do not is _______.? Answer:infectious waterborne diseases
▶ List the equipment and procedures to protect a work site.? Answer:signs,
regulated speed, cones, barricade, high level flags
▶ Who can legally install a septic tank followed by a low-pressure dosing
drain field at a rental house?? Answer:Installer II
▶ Planning materials for an OSSF utilizing secondary treatment must be
prepared by a/an? Answer:PE (professional engineer) or RS (registered
sanitarian)
▶ Penalties for violating the laws, rules, or regulations covering OSSF can
be imposed under what headings? Answer:criminal, injunction,
administrative
▶ List the 9 steps of the permitting process? Answer:1) Site Evaluations
2) Selection of an OSSF
3) System must be planned
4) Professional designer (PE or RS) submits planning materials
5) Permit application and planning materials must be prepared and
submitted
,6) The application and planning materials are reviewed by permitting
authority
7) Authorization or permit to construct (ATC) must be granted by permitting
authority BEFORE construction can begin
8) Construction begins after ATC recieved.
9) System must be inspected by permitting agency.
10) Notice of approval (NOA) and permit or license to operate will be
issued by the permitting agency when completed System has passed all
inspections.
▶ New OSSF licenses are issued for a term of ______. An individual must
complete _______ of TCEQ-approved continuing education courses in
order to renew license.? Answer:3 years, 24 hours
▶ What is needed to pre-qualify for an exam?? Answer:submitting an
application and notarized experience statements, paying class and
application fees, and successfully completing the appropriate training
course
▶ Individuals working as a __________ or in any capacity for an OSSF
___________ cannot work as an Installer, Designer for a fee, or private
Site Evaluator within the jurisdiction of the permitting authority.?
Answer:Designated representative (DR), permitting authority
▶ List the OSSF licenses that require previous experience?
Answer:installer II, Site evaluator (SE), and Maintenance Provider (MP)
▶ An individual who visits a site and conducts soil evaluations and a site
survey is a(n) __________.? Answer:site evaulator
▶ An individual who holds a valid license from the TCEQ and who is
compensated by another individual to construct, install, alter, or repair an
OSSF is a(n) _________.? Answer:installer
▶ The _______ is responsible for reviewing permit applications, site
evaluations, planning materials, and conducting inspections of OSSFs?
Answer:DR (designated representative)
▶ _______ adopted the current OSSF Rules in 1997 and revised them
several times? Answer:TCEQ
, ▶ Class II soils include the USDA classes of _________ and
__________.? Answer:sandy loam, loam
▶ The _________ is a tool to graphically delineate soil textural classes.?
Answer:USDA soil textural triangle
▶ List the two unsuitable types of soil structure or structural condition.?
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? Answer:mottling
▶ The ideal soil environment for organic effluent decomposition is one of
good ______ and ________.? Answer:soil air, soil water balance
▶ Soil associations are _______ units which encompass broad areas with
similar patterns of __________, __________, __________, and
_________.? 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.? Answer:soil survey
▶ Sites with greater than ____ percent slope are unsuitable.? Answer:30
▶ A minimum lot size of _______ acre is required for subdivisions serviced
by _________ water. The minimum size is ______ acre for those serviced
by ___________.? 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.? 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.? Answer:24, unsuitable
