CTI CTI Grout & Mortar Systems

Question 1

Which ANSI standard establishes performance requirements for standard Portland cement grouts used in tile installations?

Accepted Answer

ANSI A118.6

Answer

ANSI A108.10

Answer

ANSI A137.1

Answer

ANSI A108.01

Question 2

What is the primary advantage of epoxy grout over cement-based grout in a commercial kitchen?

Accepted Answer

It provides superior chemical and stain resistance

Answer

It is easier to mix and apply

Answer

It costs significantly less per square foot

Answer

It offers greater flexibility for movement accommodation

Question 3

What is the minimum cure time for thinset mortar before grout can be applied to a tile installation?

Accepted Answer

24 hours

Answer

2 hours

Answer

48 hours

Answer

72 hours

Question 4

Sanded grout is required for grout joints that are at least how wide?

Accepted Answer

1/8 inch

Answer

1/16 inch

Answer

3/16 inch

Answer

1/4 inch

Question 5

A CTI inspector finds hollow voids within grout joints. What is the most likely cause?

Accepted Answer

Insufficient grout was packed into the joint depth

Answer

Grout was mixed too stiff

Answer

Tiles were spaced too closely together

Answer

Wrong grout color was selected for the tile type

Question 6

What is the primary benefit of adding a polymer modifier to Portland cement grout?

Accepted Answer

It enhances flexibility, bond strength, and water resistance

Answer

It speeds up the grout cure time

Answer

It lightens the grout color for better aesthetics

Answer

It eliminates the need for sealing the finished grout