CSLB C-54 Ceramic and Mosaic Tile (Trade Exam) — All Questions

A tile contractor will cut painted walls in a preschool built in 1972. Which federal rule applies?

• a.The asbestos NESHAP only
• b.No rule; it is not housing
• c.The EPA RRP rule✓
• d.Only the OSHA noise rule

The RRP rule covers renovations for pay in pre-1978 housing and child-occupied facilities such as preschools. It is tempting to think only homes are covered.40 CFR 745 Subpart E

What is the title of the EPA pamphlet renovators must give owners before pre-1978 renovation work?

• a.Renovate Right✓
• b.Lead-Safe Homes
• c.Protect Your Family
• d.Know Your Tile

The rule's pamphlet is Renovate Right: Important Lead Hazard Information for Families, Child Care Providers and Schools, delivered no more than 60 days before work.40 CFR 745.83-.84

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

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.8 CCR 1529(g)(8)

On a construction site, what does Cal/OSHA require for combustible debris inside the building?

• a.Storage in an open pile
• b.Removal at project completion
• c.Burning on site daily
• d.Prompt removal✓

Combustible debris accumulated inside the building shall be removed promptly during construction. Waiting until completion is the tempting shortcut.8 CCR 1513(d)

A floor will receive 16 × 16 inch tile. What flatness does ANSI A108.02 require over 10 feet?

• a.3/8 inch
• b.1/4 inch
• c.1/2 inch
• d.1/8 inch✓

Tile with an edge 15 inches or longer requires 1/8 inch in 10 feet and 1/16 inch in 2 feet. 1/4 inch applies only to smaller tile.ANSI A108.02-4.1.4.3.1 via CTEF

Water dropped on a clean slab soaks in immediately. What does that indicate?

• a.A curing compound is present
• b.The slab needs acid etching
• c.The slab is too wet to tile
• d.It is receptive to mortar✓

Water that penetrates immediately indicates the concrete needs minimal preparation. Beading would suggest a sealer or curing compound.CTEF, bond breakers

Before pouring a self-leveling underlayment, what must be applied to the prepared surface?

• a.The SLU maker's primer✓
• b.Thin-set as a bonding layer
• c.A coat of sealer
• d.Water until it stands

SLUs require a properly prepared surface primed with the manufacturer's recommended product and allowed to dry. Standing water is a bond breaker.CTEF, SLU requirements

What thickness range do cement-based self-leveling underlayments cover, according to industry guidance?

• a.1 to 2 inches only
• b.Over 6 inches only
• c.1/16 inch to 6 inches✓
• d.1/4 to 1/2 inch only

Cement-based SLUs can be installed from as thin as 1/16 inch up to 6 inches, depending on the product.CTEF, underlayment guide

Under the TCNA stone method over wood (F250 STONE), what is the minimum plywood subfloor thickness?

• a.15/32 inch
• b.1/4 inch
• c.3/8 inch
• d.19/32 inch✓

F250 STONE calls for a tongue-and-groove plywood subfloor at least 19/32 inch thick, plus a second underlayment layer. 15/32 inch is the residential underlayment layer.TCNA F250 via CTEF

How are the joints between cementitious backer units treated under the VA specification?

• a.Fiberglass tape and mortar✓
• b.Left open for movement
• c.Paper tape and drywall mud
• d.Silicone sealant only

Joints and corners are filled with latex-portland cement mortar and covered with fiberglass tape embedded in the same mortar. Drywall mud is not a tile substrate treatment.VA 09 30 13

What total thickness of scratch and leveling coats does the VA specification allow over solid backing?

• a.1/8 to 1/4 inch
• b.3/8 to 5/8 inch✓
• c.5/8 to 3/4 inch
• d.1 to 1-1/2 inches

Over solid backing the coats total 3/8 to 5/8 inch; over metal lath on studs, 5/8 to 3/4 inch.VA 09 30 13

In which three forms do waterproof membranes for tile come, according to industry guidance?

• a.Wax, oil and resin
• b.Liquid, fabric and sheet✓
• c.Paper, felt and foil
• d.Grout, caulk and paint

Waterproof membranes come as liquid-applied, fabric-reinforced and sheet products, each designed to bond, support tile and stop water.CTEF, wet areas

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

The membrane is extended over drain flashing rings and turned up vertical surfaces not less than 4 inches above the finish floor.VA 09 30 13

What nominal thickness does the federal specification give for a chlorinated-polyethylene crack isolation sheet?

• a.0.030 inch✓
• b.0.125 inch
• c.0.010 inch
• d.0.040 inch

The federal specification lists 0.030 inch for the CPE crack isolation membrane and 0.040 inch for the CPE shower waterproof membrane.UFGS 09 30 10

Under TCNA's residential exposure classes, which is an example of a Res3 (wet) surface?

• a.A dining room wainscot
• b.A dry hallway floor
• c.A tub-shower wall✓
• d.A fireplace hearth

Res3 includes shower floors and tub and shower walls: surfaces soaked or frequently wet. A hallway floor is not a wet surface.TCNA Handbook via CTEF

Paint overspray is found on a slab that will receive tile. Which removal approach does industry guidance reject?

• a.Photographing and reporting it
• b.Citrus or solvent cleaners✓
• c.A change order for the removal
• d.Mechanical removal after an RFI

Industry guidance says solvents and citrus cleaners should never be used because they drive the residue deeper. Reporting and a change order are the recommended path.CTEF, bond breakers