A double-layer roof underlayment is required in an asphalt shingle roof if the roof slope is _______.
A) between 3:12 and 5:12.
B) between 3:12 and 9:12.
C) between 3:12 and 4:12.
D) between 3:12 and 6:12.
E) none of the above.
C) between 3:12 and 4:12.
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Suspended scaffolding is the least safe type of scaffold that can be used.
Answer the following statement true (T) or false (F)
When you are installing interior wood doors, it is important to remember that four hinges must be used when the door height is greater than _____.
a. 6-1/2 feet b. 7 feet c. 8 feet d. 9 feet
Dark reactions use ATP and NADPH to produce:
a. Chlorophyll c. Carbon dioxide b. Sugar d. Nitrogen
When fabricating pre-assembled mats, the perimeter joints should be tied at 100 percent, and the interior
intersections at _____. a. 20 percent b. 25 to 50 percent c. 75 to 80 percent d. 100 percent