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Nevada C 20 Tiling Contractor Practice Exam
Questions & Rationales VERIFIED SOLUTIONS
LATEST UPDATE THIS YEAR
Nevada (NV) C-20 Tiling Contractor Practice Exam
Exam Coverage Summary
Based on Nevada State Contractors Board (NSCB) requirements and the C-20 exam blueprint,
this exam covers:
• Licensing & Regulations: The C-20 license allows installation of ceramic, encaustic,
vitreous, and other tile-like products except hollow or structural partitioning tile .
Subclassifications include C-20a (Plastic Tile and Wallboard) and C-20b (Swimming Pool
Tile and Coping) . NRS Chapter 624 governs contractor licensing .
• Qualification & Exam Details: Applicants require 4 years of experience as a journeyman,
foreman, supervising employee, or contractor within the preceding 10 years . The trade
exam contains 40 multiple-choice questions with a 1.5-hour time limit and requires a
70% passing score . Candidates must also pass the Contractors Management Survey
(CMS) Business & Law exam .
• Financial Requirements: Initial license fee is $600 ($300 application + $300 licensing) .
Bond amounts range from $1,000 to $500,000 determined by the Board based on
license type and monetary limit . Monetary limits over $1,000,000 require CPA-reviewed
and audited financial statements .
• Surface Preparation: Proper surface preparation creates a clean, stable, level substrate
essential for adhesive bonding . ANSI A108.02 requires flatness of 1/8″ in 10′ and no
more than 1/16″ in 2′ for tiles with edges 15″ or longer . Green concrete with moisture
>5% requires remediation before tiling .
• Installation Methods: Back-buttering eliminates voids beneath tile . Unmodified thin-set
is suitable for ceramic tile on stable concrete substrates . Epoxy adhesives offer superior
chemical resistance for specialized applications . For diagonal patterns, a 15% waste
factor is standard .
• Waterproofing & Moisture Management: Calcium chloride test (ASTM F1869)
measures moisture vapor emission from concrete . The Nevada C-20 exam covers
critical topics including moisture testing and waterproofing membranes . Waterproof
membranes are required in shower receptors and wet areas .
• Safety & OSHA Compliance: Cutting silica-containing tile requires a respirator with a
P-100 filter . Workers' compensation insurance is mandatory for contractors with
employees; failure to carry it can result in license suspension or revocation .
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• Reciprocity: Nevada has reciprocity agreements with California, Arizona, and Utah.
Applicants must have at least 7 years of experience .
QUESTIONS 1-50
1. According to NAC 624.370, what is the primary scope of work authorized under the Nevada
C-20 Tiling Contractor classification?
A) Installation of plumbing fixtures and piping
B) Installation of ceramic, porcelain, stone, and other tiles on horizontal and vertical surfaces
C) Design and installation of electrical systems
D) Structural concrete foundation work
Answer: B) A C-20 Tiling Contractor is licensed to install various types of tile (ceramic, porcelain,
stone, etc.) on floors, walls, countertops, and other horizontal or vertical surfaces. The license
specifically excludes hollow or structural partitioning tile .
2. Which Nevada agency oversees licensing for C-20 Tiling Contractors?
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A) Nevada Department of Transportation
B) Nevada State Contractors Board (NSCB)
C) Nevada Division of Industrial Relations
D) Nevada Real Estate Division
Answer: B) The Nevada State Contractors Board (NSCB) oversees licensing for all construction-
related trades, including C-20 Tiling Contractors. The Board is responsible for licensing,
investigating complaints, and taking disciplinary action .
3. What is the minimum experience requirement for C-20 Tiling Contractor licensure in
Nevada?
A) 2 years as a journeyman
B) 4 years as a journeyman, foreman, supervising employee, or contractor within the preceding
10 years
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C) 1 year of apprenticeship only
D) No experience required
Answer: B) Applicants must have four years of experience as a journeyman, foreman,
supervising employee, or contractor in the trade within the preceding 10 years to qualify for the
C-20 license .
4. According to NAC 624.370, which type of tile is a C-20 contractor NOT permitted to install?
A) Ceramic tile
B) Encaustic tile
C) Vitreous tile
D) Hollow or structural partitioning tile
Answer: D) NAC 624.370 explicitly states that a C-20 license does NOT authorize the installation
of hollow or structural partitioning tile. The license permits ceramic, encaustic, vitreous, and
other tile-like products .
Nevada C 20 Tiling Contractor Practice Exam
Questions & Rationales VERIFIED SOLUTIONS
LATEST UPDATE THIS YEAR
Nevada (NV) C-20 Tiling Contractor Practice Exam
Exam Coverage Summary
Based on Nevada State Contractors Board (NSCB) requirements and the C-20 exam blueprint,
this exam covers:
• Licensing & Regulations: The C-20 license allows installation of ceramic, encaustic,
vitreous, and other tile-like products except hollow or structural partitioning tile .
Subclassifications include C-20a (Plastic Tile and Wallboard) and C-20b (Swimming Pool
Tile and Coping) . NRS Chapter 624 governs contractor licensing .
• Qualification & Exam Details: Applicants require 4 years of experience as a journeyman,
foreman, supervising employee, or contractor within the preceding 10 years . The trade
exam contains 40 multiple-choice questions with a 1.5-hour time limit and requires a
70% passing score . Candidates must also pass the Contractors Management Survey
(CMS) Business & Law exam .
• Financial Requirements: Initial license fee is $600 ($300 application + $300 licensing) .
Bond amounts range from $1,000 to $500,000 determined by the Board based on
license type and monetary limit . Monetary limits over $1,000,000 require CPA-reviewed
and audited financial statements .
• Surface Preparation: Proper surface preparation creates a clean, stable, level substrate
essential for adhesive bonding . ANSI A108.02 requires flatness of 1/8″ in 10′ and no
more than 1/16″ in 2′ for tiles with edges 15″ or longer . Green concrete with moisture
>5% requires remediation before tiling .
• Installation Methods: Back-buttering eliminates voids beneath tile . Unmodified thin-set
is suitable for ceramic tile on stable concrete substrates . Epoxy adhesives offer superior
chemical resistance for specialized applications . For diagonal patterns, a 15% waste
factor is standard .
• Waterproofing & Moisture Management: Calcium chloride test (ASTM F1869)
measures moisture vapor emission from concrete . The Nevada C-20 exam covers
critical topics including moisture testing and waterproofing membranes . Waterproof
membranes are required in shower receptors and wet areas .
• Safety & OSHA Compliance: Cutting silica-containing tile requires a respirator with a
P-100 filter . Workers' compensation insurance is mandatory for contractors with
employees; failure to carry it can result in license suspension or revocation .
,Page 2 of 143
• Reciprocity: Nevada has reciprocity agreements with California, Arizona, and Utah.
Applicants must have at least 7 years of experience .
QUESTIONS 1-50
1. According to NAC 624.370, what is the primary scope of work authorized under the Nevada
C-20 Tiling Contractor classification?
A) Installation of plumbing fixtures and piping
B) Installation of ceramic, porcelain, stone, and other tiles on horizontal and vertical surfaces
C) Design and installation of electrical systems
D) Structural concrete foundation work
Answer: B) A C-20 Tiling Contractor is licensed to install various types of tile (ceramic, porcelain,
stone, etc.) on floors, walls, countertops, and other horizontal or vertical surfaces. The license
specifically excludes hollow or structural partitioning tile .
2. Which Nevada agency oversees licensing for C-20 Tiling Contractors?
,Page 3 of 143
A) Nevada Department of Transportation
B) Nevada State Contractors Board (NSCB)
C) Nevada Division of Industrial Relations
D) Nevada Real Estate Division
Answer: B) The Nevada State Contractors Board (NSCB) oversees licensing for all construction-
related trades, including C-20 Tiling Contractors. The Board is responsible for licensing,
investigating complaints, and taking disciplinary action .
3. What is the minimum experience requirement for C-20 Tiling Contractor licensure in
Nevada?
A) 2 years as a journeyman
B) 4 years as a journeyman, foreman, supervising employee, or contractor within the preceding
10 years
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C) 1 year of apprenticeship only
D) No experience required
Answer: B) Applicants must have four years of experience as a journeyman, foreman,
supervising employee, or contractor in the trade within the preceding 10 years to qualify for the
C-20 license .
4. According to NAC 624.370, which type of tile is a C-20 contractor NOT permitted to install?
A) Ceramic tile
B) Encaustic tile
C) Vitreous tile
D) Hollow or structural partitioning tile
Answer: D) NAC 624.370 explicitly states that a C-20 license does NOT authorize the installation
of hollow or structural partitioning tile. The license permits ceramic, encaustic, vitreous, and
other tile-like products .
