CTI Tile Layout & Design 4

Question 1

When planning a tile layout for a shower floor with a linear drain along one wall, the floor tiles should be:

Accepted Answer

Sloped uniformly toward the drain at 1/4 inch per foot

Answer

Shower floors with a linear drain require a consistent 1/4-inch-per-foot slope across the entire floor toward the drain.

Question 2

The term 'calibrated tile' refers to tile that has been:

Accepted Answer

Mechanically sized after firing to achieve consistent dimensions

Answer

Calibrated tile is mechanically cut after firing to ensure precise, consistent dimensions that minimize variation in joint width.

Question 3

When setting a medallion or decorative tile insert into a floor, the installer should:

Accepted Answer

Set the medallion first, then plan surrounding tiles to it

Answer

A medallion's design is fixed, so surrounding tiles must be laid out and cut to fit the medallion, not the reverse.

Question 4

What is the TCNA-recommended maximum variation in substrate flatness for tiles with any edge longer than 15 inches?

Accepted Answer

3/16 inch in 10 feet

Answer

TCNA and ANSI A108.02 require no more than 3/16-inch variation in 10 feet (or 1/8-inch in 24 inches) for tiles with edges over 15 inches.

Question 5

A tile installer is setting 12x24 inch tiles in a stacked (grid) pattern. To prevent a 'picket fence' effect, they should:

Accepted Answer

Rotate tiles 90° so the long dimension runs perpendicular to the main viewing direction

Answer

Orienting the long dimension perpendicular to the primary sightline reduces the visual 'picket fence' striping caused by continuous vertical joints.

(CTI) Certified Tile Installer Practice Test