CTI CTI Tools & Equipment

Question 1

Which type of trowel is most commonly used to apply thin-set mortar for large-format tiles?

Accepted Answer

Square-notch trowel

Answer

A square-notch trowel is recommended for large-format tiles because it provides maximum mortar coverage.

Question 2

What is the primary purpose of a rubber mallet in tile installation?

Accepted Answer

Embedding tiles firmly into mortar without cracking them

Answer

A rubber mallet gently seats tiles into the mortar bed without the impact force that would crack the tile.

Question 3

Which saw is best suited for cutting curves and irregular shapes in ceramic tile?

Accepted Answer

Rotary tool with diamond bit

Answer

A rotary tool fitted with a diamond bit allows freehand curved cuts that straight-blade saws cannot make.

Question 4

What does a tile lippage leveling system primarily help prevent?

Accepted Answer

Uneven tile edges that create height differences between adjacent tiles

Answer

Lippage systems use clips and wedges to hold adjacent tiles flush while the mortar cures, eliminating height differences.

Question 5

When should a diamond blade wet saw be used instead of a score-and-snap cutter?

Accepted Answer

For porcelain or stone tiles that are too hard or thick to snap cleanly

Answer

Dense porcelain and natural stone require a diamond wet saw because the score-and-snap method causes irregular breaks in hard materials.

(CTI) Certified Tile Installer Practice Test