CTI CTI Grout & Mortar Systems 2

Question 1

Which setting mortar has a peanut-butter consistency and is applied with a notched trowel to create bonding ridges?

Accepted Answer

Thinset mortar

Answer

Dry-pack mortar

Answer

Medium-bed mortar

Answer

Thick-bed mortar

Question 2

ANSI A118.4 specifies performance requirements for which type of tile setting mortar?

Accepted Answer

Latex-Portland cement (polymer-modified) mortar

Answer

Standard dry-set Portland cement thinset

Answer

Two-component epoxy adhesive

Answer

Organic mastic adhesive

Question 3

When inspecting large-format tile (24"×24" or larger) installations, what technique should a CTI inspector verify was used to achieve proper coverage?

Accepted Answer

Large-format mortar with back-buttering of tile back

Answer

Standard V-notch trowel without back-buttering

Answer

Organic mastic applied directly to tile backs

Answer

Epoxy grout used as both adhesive and grout

Question 4

What minimum mortar contact coverage does TCNA require for tile installations in wet areas such as showers?

Accepted Answer

95%

Answer

80%

Answer

85%

Answer

100%

Question 5

What product is the standard recommendation for removing dried cement grout haze from tile surfaces?

Accepted Answer

Sulfamic acid-based cleaner

Answer

Muriatic acid solution

Answer

Household bleach solution

Answer

Mechanical power sanding

Question 6

What does a medium-bed mortar offer that standard thinset mortar cannot provide?

Accepted Answer

Application thickness up to 3/4 inch without slumping or shrinking

Answer

Faster cure time for same-day grouting

Answer

Permanent flexibility after full cure

Answer

Water resistance without polymer additives