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Advertising supplement provided by
National Gypsum Company

• Read the article "Understanding the UL Directory: Fire-Resistant Assemblies"
• Complete the questions below, then fill in your answers .
• Fill out and submit the AIA/CES education reporting form in the magazine or print the form to receive one AIA learning unit.

Questions:

LU: 1 HS: 1

1. Base layers in multi layer systems are not required to have joints or
fastener heads taped or covered with joint compound.
a. True
b. False

2. The process of calcination makes gypsum board ideally fire-resistant because:
a. The gypsum material – hydrous calcium sulfate – expands when exposed to heat and acts as a barrier.
b. The surface of the gypsum board conducts the heat to the more fire- resistant materials in an assembly.
c. When exposed to fire, water molecules in the board turn to steam and act as a thermal barrier.

3. Fire resistance ratings apply to which:
a. Assemblies or systems
b. Gypsum products themselves

4. The standard test the UL Directory uses for fire ratings of assemblies is:
a. ASTM E119
b. UL No. L558
c. ANSI/UL 1709

5. The added component in Type X gypsum board that gives it a superior fire resistance over regular gypsum board is:
a. Water
b. Calcium
c. Fiberglass

6. What is the fire rating for 5/8" Type X Wallboard?
a. 1 hour
b. 2 hour
c. No fire rating

7. Screws can be used as an alternate to nails in wallboard designs.
a. True (provided diameter, length and spacing equal or exceed nails)
b. False

8. Gypsum is approximately ___% water:
a. 11 %
b. 21 %
c. 31 %
d. 41 %

9. Gypsum wallboard assemblies are found in:
A: a. Volume 1
b. Volume 2
c. Volume 3

10. When searching for a UL design using the numbering chart, the first item to consider is the Type of Protection.
a. True
b. False

Click here to print the reporting form.

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