Closed-cell foam, which is installed at a rate of approximately ____ lb/ft3, has a high R-value and very low vapor-permeability.
A. 0.5
B. 1.2
C. 2
D. 5
Answer: C
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Insulating concrete and foamed concrete are two types of insulating concrete that can be used as insulation on a steel roof deck. Is the steel deck used under such concrete required to be a special type of steel deck and why?
What will be an ideal response?
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A diploid vertebrate male would have which type of chromosome arrangement?
a. XX c. XY b. YY d. XZ
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Though metal railings are available in ready-to-install form, the architectural style of most wood decks call for __________ railing.
A. concrete B. composite C. Portland cement D. composite metal
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The total resistance of __________ connected in series is equal to the sum of the individual resistors
A. elements B. terminals C. resistors D. circuits
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