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ARIZONA CR8 FLOOR COVERING PRACTICE EXAM QUESTIONS AND
DETAILED ANSWERS | PLUS RATIONALES | GUARANTEED PASS | LATEST
EXAM UPDATE
Question 1: According to the Arizona Registrar of Contractors (ROC) guidelines, what is the
maximum depth of an concrete slab moisture test pit when utilizing the relative humidity test
method in accordance with ASTM F2170?
A. 10% of the slab thickness
B. 20% of the slab thickness for slabs drying from one side
C. 40% of the slab thickness for slabs drying from one side
D. 50% of the slab thickness regardless of drying orientation
CORRECT ANSWER: C. 40% of the slab thickness for slabs drying from one side
Rationale: ASTM F2170 specifies that when testing relative humidity in a concrete slab that is drying
from one side only, the test hole must be drilled to a depth equal to 40% of the total slab thickness.
If the slab is drying from both top and bottom (such as an elevated slab), the hole depth must be
20% of the slab thickness.
Question 2: Which substrate surface preparation technique is recommended prior to applying a
moisture mitigation barrier over a porous concrete subfloor?
A. Acid etching with muriatic acid
B. Mechanical shot blasting or diamond grinding
C. Pressure washing with high-pressure water jets
D. Solvent wiping with mineral spirits
CORRECT ANSWER: B. Mechanical shot blasting or diamond grinding
Rationale: Industry standards (including ICRI guidelines and ASTM F710) specify that chemical
methods like acid etching or solvent wiping leave residues or weaken concrete surfaces.
Mechanical preparation, such as shot blasting or diamond grinding, creates an acceptable
concrete surface profile (CSP) required for proper adhesion of epoxy or urethane moisture
mitigation barriers.
Question 3: When installing glue-down engineered hardwood over a concrete subfloor, what is the
maximum allowable moisture vapor emission rate (MVER) under ASTM F1869 standard unless a
moisture barrier is applied?
A. 3 lbs / 1,000 sq ft / 24 hours
B. 5 lbs / 1,000 sq ft / 24 hours
C. 8 lbs / 1,000 sq ft / 24 hours
D. 12 lbs / 1,000 sq ft / 24 hours
CORRECT ANSWER: A. 3 lbs / 1,000 sq ft / 24 hours
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Rationale: The baseline standard MVER threshold for most hardwood adhesives and wood floor
manufacturers using the Calcium Chloride test (ASTM F1869) is 3.0 lbs per 1,000 square feet per 24
hours. Exceeding this limit requires an approved moisture mitigation membrane.
,3
Question 4: What is the primary purpose of acclimating solid hardwood flooring at the job site
prior to installation?
A. To allow the finish coating to cure fully
B. To balance the equilibrium moisture content (EMC) of the wood with the ambient relative
humidity and temperature of the site
C. To relax the tongue and groove milled edges for easier engagement
D. To eliminate off-gassing of volatile organic compounds (VOCs)
CORRECT ANSWER: B. To balance the equilibrium moisture content (EMC) of the wood with the
ambient relative humidity and temperature of the site
Rationale: Wood is a hygroscopic material that expands and contracts with atmospheric changes.
Acclimation allows the wood's moisture content to reach equilibrium with the normal operational
indoor relative humidity and temperature of the space prior to installation, preventing post-
installation cupping, gapping, or crowning.
Question 5: What standard gap width is required around the perimeter ofa residential floating
laminate floor installation to accommodate expansion?
A. 1/16 inch
B. 1/8 inch
C. 1/4 inch to 3/8 inch
D. 3/4 inch to 1 inch
CORRECT ANSWER: C. 1/4 inch to 3/8 inch
Rationale: Floating floors require a continuous expansion gap around all fixed vertical obstructions,
perimeter walls, cabinets, and columns. The industry standard recommendation for residential
floating laminate or LVP installations is 1/4 inch to 3/8 inch to allow natural movement without
buckling.
Question 6: In broadloom carpet installation, what is the primary purpose ofapplying seam sealer
adhesive along the trimmed edge of the carpet backing prior to joining seams?
A. To glue the carpet backing directly to the cushion pad
B. To prevent edge raveling and tuft bind loss along the cut seam edges
C. To fill wide gaps caused by uneven subfloors
D. To attach tackless strips permanently to concrete
CORRECT ANSWER: B. To prevent edge raveling and tuft bind loss along the cut seam edges
Rationale: Applying a chemical seam sealer (or thermoplastic edge sealer) along cut edges seals
the primary and secondary backings together and locks in cut face yarns. This prevents fraying,
edge unraveling, and seam separation under traffic.
Question 7: According to the CRI 104/105 Installation Standards, carpet installed with stretch-in
power stretchers must be stretched to what percentage of net length and width?
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A. 0.5% to 1% net stretch
B. 1% to 1.5% net stretch in both directions
C. 2% to 3% net stretch in length and width
D. 5% net stretch in length only
CORRECT ANSWER: B. 1% to 1.5% net stretch in both directions
Rationale: Proper mechanical stretching with a power stretcher requires extending broadloom
carpet approximately 1% to 1.5% in both length and width during installation to prevent future
wrinkling, buckling, and premature wear.
Question 8: What type of trowel notch is required when applying a pressure-sensitive adhesive for
Luxury Vinyl Tile (LVT) over a non-porous subfloor?
A. 1/4" x 1/4" Square Notch
B. 1/16" x 1/16" x 1/16" Square Notch
C. 1/16" x 1/32" x 1/32" U-Notch or Fine V-Notch
D. 3/8" x 3/8" V-Notch
CORRECT ANSWER: C. 1/16" x 1/32" x 1/32" U-Notch or Fine V-Notch
Rationale: Resilient flooring over non-porous subfloors requires a very fine notch trowel (typically
1/16" x 1/32" x 1/32" or similar fine V-notch) to apply a thin, uniform film. Excessive adhesive
application on non-porous subfloors leads to telegraphing, displacement, and adhesive bleed-
through at seams.
Question 9: Under Arizona ROC regulations, what is the threshold contract amount (including labor
and materials) that requires a licensed contractor rather than an unlicensed handyman?
A. $500
B. $1,000
C. $2,500
D. $5,000
CORRECT ANSWER: B. $1,000
Rationale: Under Arizona Revised Statutes (A.R.S. § 32-1121), the "handyman exemption" applies only
to work where the total contract price, including labor, materials, and all other items, is less than
$1,000, provided no building permit is required.
Question 10: Which type ofunderlayment board is required when installing ceramic tile over a
wood subfloor system?
A. Standard interior grade 1/2" particleboard
B. Cementitious backer unit (CBU) or fiber-cement underlayment
C. 1/4" tempered hardboard (Masonite)
ARIZONA CR8 FLOOR COVERING PRACTICE EXAM QUESTIONS AND
DETAILED ANSWERS | PLUS RATIONALES | GUARANTEED PASS | LATEST
EXAM UPDATE
Question 1: According to the Arizona Registrar of Contractors (ROC) guidelines, what is the
maximum depth of an concrete slab moisture test pit when utilizing the relative humidity test
method in accordance with ASTM F2170?
A. 10% of the slab thickness
B. 20% of the slab thickness for slabs drying from one side
C. 40% of the slab thickness for slabs drying from one side
D. 50% of the slab thickness regardless of drying orientation
CORRECT ANSWER: C. 40% of the slab thickness for slabs drying from one side
Rationale: ASTM F2170 specifies that when testing relative humidity in a concrete slab that is drying
from one side only, the test hole must be drilled to a depth equal to 40% of the total slab thickness.
If the slab is drying from both top and bottom (such as an elevated slab), the hole depth must be
20% of the slab thickness.
Question 2: Which substrate surface preparation technique is recommended prior to applying a
moisture mitigation barrier over a porous concrete subfloor?
A. Acid etching with muriatic acid
B. Mechanical shot blasting or diamond grinding
C. Pressure washing with high-pressure water jets
D. Solvent wiping with mineral spirits
CORRECT ANSWER: B. Mechanical shot blasting or diamond grinding
Rationale: Industry standards (including ICRI guidelines and ASTM F710) specify that chemical
methods like acid etching or solvent wiping leave residues or weaken concrete surfaces.
Mechanical preparation, such as shot blasting or diamond grinding, creates an acceptable
concrete surface profile (CSP) required for proper adhesion of epoxy or urethane moisture
mitigation barriers.
Question 3: When installing glue-down engineered hardwood over a concrete subfloor, what is the
maximum allowable moisture vapor emission rate (MVER) under ASTM F1869 standard unless a
moisture barrier is applied?
A. 3 lbs / 1,000 sq ft / 24 hours
B. 5 lbs / 1,000 sq ft / 24 hours
C. 8 lbs / 1,000 sq ft / 24 hours
D. 12 lbs / 1,000 sq ft / 24 hours
CORRECT ANSWER: A. 3 lbs / 1,000 sq ft / 24 hours
,2
Rationale: The baseline standard MVER threshold for most hardwood adhesives and wood floor
manufacturers using the Calcium Chloride test (ASTM F1869) is 3.0 lbs per 1,000 square feet per 24
hours. Exceeding this limit requires an approved moisture mitigation membrane.
,3
Question 4: What is the primary purpose of acclimating solid hardwood flooring at the job site
prior to installation?
A. To allow the finish coating to cure fully
B. To balance the equilibrium moisture content (EMC) of the wood with the ambient relative
humidity and temperature of the site
C. To relax the tongue and groove milled edges for easier engagement
D. To eliminate off-gassing of volatile organic compounds (VOCs)
CORRECT ANSWER: B. To balance the equilibrium moisture content (EMC) of the wood with the
ambient relative humidity and temperature of the site
Rationale: Wood is a hygroscopic material that expands and contracts with atmospheric changes.
Acclimation allows the wood's moisture content to reach equilibrium with the normal operational
indoor relative humidity and temperature of the space prior to installation, preventing post-
installation cupping, gapping, or crowning.
Question 5: What standard gap width is required around the perimeter ofa residential floating
laminate floor installation to accommodate expansion?
A. 1/16 inch
B. 1/8 inch
C. 1/4 inch to 3/8 inch
D. 3/4 inch to 1 inch
CORRECT ANSWER: C. 1/4 inch to 3/8 inch
Rationale: Floating floors require a continuous expansion gap around all fixed vertical obstructions,
perimeter walls, cabinets, and columns. The industry standard recommendation for residential
floating laminate or LVP installations is 1/4 inch to 3/8 inch to allow natural movement without
buckling.
Question 6: In broadloom carpet installation, what is the primary purpose ofapplying seam sealer
adhesive along the trimmed edge of the carpet backing prior to joining seams?
A. To glue the carpet backing directly to the cushion pad
B. To prevent edge raveling and tuft bind loss along the cut seam edges
C. To fill wide gaps caused by uneven subfloors
D. To attach tackless strips permanently to concrete
CORRECT ANSWER: B. To prevent edge raveling and tuft bind loss along the cut seam edges
Rationale: Applying a chemical seam sealer (or thermoplastic edge sealer) along cut edges seals
the primary and secondary backings together and locks in cut face yarns. This prevents fraying,
edge unraveling, and seam separation under traffic.
Question 7: According to the CRI 104/105 Installation Standards, carpet installed with stretch-in
power stretchers must be stretched to what percentage of net length and width?
, 4
A. 0.5% to 1% net stretch
B. 1% to 1.5% net stretch in both directions
C. 2% to 3% net stretch in length and width
D. 5% net stretch in length only
CORRECT ANSWER: B. 1% to 1.5% net stretch in both directions
Rationale: Proper mechanical stretching with a power stretcher requires extending broadloom
carpet approximately 1% to 1.5% in both length and width during installation to prevent future
wrinkling, buckling, and premature wear.
Question 8: What type of trowel notch is required when applying a pressure-sensitive adhesive for
Luxury Vinyl Tile (LVT) over a non-porous subfloor?
A. 1/4" x 1/4" Square Notch
B. 1/16" x 1/16" x 1/16" Square Notch
C. 1/16" x 1/32" x 1/32" U-Notch or Fine V-Notch
D. 3/8" x 3/8" V-Notch
CORRECT ANSWER: C. 1/16" x 1/32" x 1/32" U-Notch or Fine V-Notch
Rationale: Resilient flooring over non-porous subfloors requires a very fine notch trowel (typically
1/16" x 1/32" x 1/32" or similar fine V-notch) to apply a thin, uniform film. Excessive adhesive
application on non-porous subfloors leads to telegraphing, displacement, and adhesive bleed-
through at seams.
Question 9: Under Arizona ROC regulations, what is the threshold contract amount (including labor
and materials) that requires a licensed contractor rather than an unlicensed handyman?
A. $500
B. $1,000
C. $2,500
D. $5,000
CORRECT ANSWER: B. $1,000
Rationale: Under Arizona Revised Statutes (A.R.S. § 32-1121), the "handyman exemption" applies only
to work where the total contract price, including labor, materials, and all other items, is less than
$1,000, provided no building permit is required.
Question 10: Which type ofunderlayment board is required when installing ceramic tile over a
wood subfloor system?
A. Standard interior grade 1/2" particleboard
B. Cementitious backer unit (CBU) or fiber-cement underlayment
C. 1/4" tempered hardboard (Masonite)
