What are asphalt shingles made of?
What will be an ideal response?
They are made of a fiberglass mat, coated with asphalt and covered on its top face with mineral granules. The color of granules gives the shingles their distinctive look.
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As a rule, if stones are to be used for the facing of the fireplace, it is not necessary to dry bond.
Answer the following statement true (T) or false (F)
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This is the most commonly used method of making castings.
a. centrifugal casting b. die casting c. permanent casting d. investment casting
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What percentage of a plant's fresh weight is water?
A) 70 to 90% B) 10 to 20% C) 50 to 65% D) 25 to 45%
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DEVELOPING AND SELLING AN INNOVATIVE IDEA
 FIGURE 1.png)
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