CTI Industry Standards & Code Compliance 2 — Questions and Answers
Question 1: Per TCNA guidelines, expansion joints (movement joints) in tile installations must be filled with which material?
- Non-sanded portland cement grout
- Portland cement mortar
- Flexible sealant complying with ASTM C920 (Correct answer)
- Epoxy adhesive for rigid bonding
Correct answer: Flexible sealant complying with ASTM C920
TCNA guidelines require movement joints to be filled with a flexible sealant complying with ASTM C920 to accommodate substrate movement without cracking.
Question 2: Which ANSI standard specifically governs the installation of ceramic tile with dry-set portland cement mortar or latex-portland cement mortar?
- ANSI A108.1
- ANSI A108.5 (Correct answer)
- ANSI A108.10
- ANSI A108.13
Correct answer: ANSI A108.5
ANSI A108.5 covers the installation of ceramic tile using dry-set portland cement mortar or latex-portland cement mortar (thinset methods).
Question 3: The Americans with Disabilities Act (ADA) specifies that the maximum running slope for accessible tile floor surfaces must not exceed which ratio?
- 1:10 (10%)
- 1:20 (5%)
- 1:48 (approximately 2%) (Correct answer)
- 1:100 (1%)
Correct answer: 1:48 (approximately 2%)
The ADA requires accessible floor surfaces to have a maximum running slope of 1:48 (approximately 2%) to ensure wheelchair accessibility.
Question 4: ISO 13006 classifies ceramic tiles primarily based on which two characteristics?
- Surface finish and color range
- Water absorption rate and manufacturing method (Correct answer)
- Country of origin and clay composition
- Thickness and breaking strength only
Correct answer: Water absorption rate and manufacturing method
ISO 13006 classifies ceramic tiles by water absorption rate (Groups I, IIa, IIb, III) and manufacturing method (extruded or dry-pressed), which determines their appropriate applications.
Question 5: According to TCNA EJ171 guidelines, how frequently should movement joints be placed in interior floor tile installations?
- Every 8 to 12 feet in each direction (Correct answer)
- Every 20 to 25 feet in each direction
- Every 40 to 50 feet in each direction
- Only at perimeter walls and doorways
Correct answer: Every 8 to 12 feet in each direction
TCNA EJ171 requires movement joints to be placed every 8 to 12 feet in each direction for interior tile floors to accommodate thermal and structural movement.
Question 6: ANSI A118.12 establishes performance requirements for which category of tile installation materials?
- Load-bearing waterproof membranes
- Crack isolation membranes (Correct answer)
- Chemical-resistant epoxy grouts
- Latex-modified portland cement mortars
Correct answer: Crack isolation membranes
ANSI A118.12 covers crack isolation membranes used beneath tile to prevent substrate cracks from reflecting through the tile assembly.
Question 7: The CTI (Certified Tile Installer) credential is administered by which organization?
- Tile Council of North America (TCNA)
- National Tile Contractors Association (NTCA)
- Ceramic Tile Education Foundation (CTEF) (Correct answer)
- American National Standards Institute (ANSI)
Correct answer: Ceramic Tile Education Foundation (CTEF)
The Ceramic Tile Education Foundation (CTEF) administers the CTI program, which tests hands-on installation skills and tile knowledge.
CTI Industry Standards & Code Compliance 2
Per TCNA guidelines, expansion joints (movement joints) in tile installations must be filled with which material?