Architectural Zinc: From Gray to Green

Instructions

• Read the article "Architectural Zinc: From Gray to Green"
• Complete the questions below, then fill in your answers.
• Fill out and submit the AIA/CES education reporting form in the magazine, securely online, or print the form to receive one AIA learning unit.

Questions:

Program Code: 127SPONE
LU: 1

1. The definition of a “heavy metal” refers only to:
a. Metals with specific gravity (weight compared to water) over 5 g/cm3.
b. Metals such as lead with high toxicity to animals and humans.
c. Metals that contribute to acid rain.
d. Metals not light enough to rise into the atmosphere.

2. The anti-corrosive properties of zinc are primarily due to:
a Anti-corrosive additives in the alloy.
b. Factory applied sealants.
c. The hardness of the material surface.
d. Patination, the formation of a protective zinc carbonate layer.

3. Zinc used in architectural applications is typically:
a. As close to pure metallic zinc as possible.
b. An alloy composed of half zinc and half titanium.
c. An alloy of zinc that is 99.995 percent pure, with small amounts of titanium and copper.
d. An alloy of zinc that is 99 percent pure, with the remainder unidentified trace elements.

4. Zinc alloy products used in architecture for roofs and walls have an estimated service life of:
a. Less than 10 years for roofs, but 80 to 100 years for walls.
b. 17 years for roofs, 25 years for walls.
c. 50 years for roofs or walls.
d. 80 to100 years for roofs, 200 to 300 years for walls.

5. A material’s Life Cycle Cost can be reduced by which of the following factors:
a. Long service life.
b. Low maintenance costs.
c. High recyclability, avoiding replacement and disposal costs.
d. All of the above.

6. Which of the following materials will require the least maintenance throughout its service life:
a. Single ply roofing.
b. Zinc alloy roofing.
c. Painted metal.
d. Asphalt shingle roofing.

7. Of the non-ferrous metals used in construction, zinc:
a. Has only slightly lower embodied energy than other metals.
b. Has the lowest embodied energy, requiring ? to 1¼3 the energy to process of aluminum, copper or stainless steel.
c. Has roughly the same embodied energy as other metals.
d. Has never been analyzed for embodied energy.

8. Which of the following statements is true of zinc:
a. Zinc is the 23rd most abundant material in the earth’s crust.
b. Zinc is not naturally present in the atmosphere, but only occurs as a result of processing and use.
c. Zinc is a rare mineral, found in only a few places around the world.
d. Zinc is not used in products for human consumption.

9. Zinc is primarily extracted from:
a. Deep mines worldwide.
b. Strip mines.
c. Underground mines in only two countries.
d. Recycled batteries.

10. The reduction of zinc in the atmosphere to pre-industrial levels seen over the past 20 years is due to better emission controls, but another major factor is:
a. The reduction of acid rain, which in turn reduces the corrosion of exposed zinc surfaces and lengthens their life.
b. Global warming.
c. Discovery of ores with less zinc concentration.
d. Decreased use of zinc products.