CSLB C-54 Ceramic and Mosaic Tile (Trade Exam) Practice Test
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| Administering body | Contractors State License Board (CSLB), California Department of Consumer Affairs — exam delivered by PSI Services LLC |
|---|---|
| Questions | Not published by CSLB What we read and found nothing in: CSLB — Step 7: Studying for the Examination |
| Time limit | 210 minutes |
| Passing score | Not published by CSLB What we read and found nothing in: CSLB — Step 7: Studying for the Examination |
| Fees |
Source: CSLB — List of All CSLB Fees |
| Languages offered | English · Spanish |
Frequently asked questions
How many CSLB Trade — Ceramic and Mosaic Tile (C-54) practice questions are here?+
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What is the CSLB Trade — Ceramic and Mosaic Tile (C-54) exam like?+
A multiple-choice exam, 210 minutes. Practice by topic here, then take the full timed mock exam to gauge readiness.
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Sample practice questions
A few real questions from this free bank, with full explanations. Use the practice tool above for the whole set.
- 1. Planning and Estimating
A kitchen floor measures 7 ft 6 in. by 10 ft. What is its area?
- a.76 ft²
- b.75 ft²
- c.86 ft²
- d.70 ft²
Answer: b
Explanation: 7 ft 6 in. is 7.5 ft, and 7.5 × 10 = 75 ft². Reading 7 ft 6 in. as 7.6 ft gives 76 ft², the common error of treating inches as tenths of a foot.
Source: NIST Handbook 44, App. C (units)
- 2. Planning and Estimating
Glazed ceramic wall tile made for interior walls typically falls in which water-absorption class?
- a.Non-vitreous
- b.Vitreous
- c.Semi-vitreous
- d.Impervious
Answer: a
Explanation: Glazed wall tile is typically non-vitreous, absorbing 7 percent or more, and is recommended for walls only. Impervious describes porcelain.
Source: ANSI A137.1 via UFGS 09 30 10
- 3. Preparation for Tile and Stone Installation
When vacuuming floors after removing presumed-asbestos vinyl tile, what floor tool must the HEPA vacuum use?
- a.Any tool with a HEPA bag
- b.A rotating brush head
- c.A metal tool, no brush
- d.A carpet beater bar
Answer: c
Explanation: Cal/OSHA requires HEPA vacuums with a disposable bag and a metal floor tool, no brush. A brush head is the tempting default, but the order specifies a metal floor tool with no brush.
Source: 8 CCR 1529(g)(8)
- 4. Preparation for Tile and Stone Installation
Under the VA liquid-membrane procedure, how far up the walls is the membrane turned?
- a.At least 1 inch
- b.Only to the cove joint
- c.At least 4 inches
- d.At least 12 inches
Answer: c
Explanation: The membrane is extended over drain flashing rings and turned up vertical surfaces not less than 4 inches above the finish floor.
Source: VA 09 30 13
- 5. Installation and Repairs
Under the TCNA Handbook's stone rule, where may no voids occur under natural stone tile?
- a.Within 6 inches of the edges
- b.Only at the center
- c.Anywhere under dry-area tile
- d.Within 2 inches of corners
Answer: d
Explanation: Stone requires 95 percent coverage with no void over 2 square inches and none within 2 inches of the corners.
Source: TCNA Handbook via CTEF
- 6. Installation and Repairs
A slab has a 1/2 inch expansion joint under a new tile floor. How wide must the tile's movement joint be?
- a.No joint is needed
- b.At least 1/2 inch
- c.At least 1/4 inch
- d.Grout-joint width only
Answer: b
Explanation: Joints through tile over structural joints must never be narrower than the structural joint.
Source: TCNA Handbook via CTEF
- 7. Installation and Repairs
What minimum drain and trap size do city handouts list for a shower?
- a.2 inches
- b.3 inches
- c.1-1/4 inches
- d.1-1/2 inches
Answer: a
Explanation: Showers require a minimum 2-inch drain and trap; tub-to-shower conversions increase smaller waste outlets to 2 inches.
Source: CPC per city handouts (2025 codes)
- 8. Specialty Installations
What substrate flatness must be met at a minimum for gauged porcelain tile panels?
- a.1/8 inch in 10 feet
- b.1/16 inch in 10 feet
- c.1/2 inch in 10 feet
- d.1/4 inch in 10 feet
Answer: a
Explanation: The A137.3/A108.19 installation requires at least the 1/8 inch in 10 feet standard for large tile.
Source: ANSI A108.19 via CTEF
- 9. Specialty Installations
What minimum thickness does the VA specification set for a marble threshold?
- a.1/2 inch
- b.1-1/2 inches
- c.1/4 inch
- d.3/4 inch
Answer: d
Explanation: Thresholds are one piece, at least 3/4 inch thick, with at least 1/4 inch at the beveled edge.
Source: VA 09 30 13
- 10. Safety
At what outdoor temperature must shade be present for a tile crew under section 3395?
- a.Above 80°F
- b.Above 70°F
- c.Above 95°F
- d.Above 100°F
Answer: a
Explanation: Shade shall be present when the temperature exceeds 80°F; high-heat procedures begin at 95°F.
Source: 8 CCR 3395(d)