How far below the finished surface should snow-melting and anti-icing systems be installed?
a. 1/4 to 1/2 inch (6 to 13 mm)
b. 1-1/2 to 2 inches (4 to 5 cm)
c. 2 to 3 inches (5 to 8 cm)
d. 3 to 4 inches (8 to 10 cm)
b. 1-1/2 to 2 inches (4 to 5 cm)
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A rectangular building with a near-flat roof is acted upon by wind at right angle to one of the walls. Which of the following envelope surfaces will be acted upon by positive (toward-the-surface) pressure and which envelope surfaces will be subjected to suction (negative pressure)?
Windward wall Leeward wall Side walls Roof
A LePelletier gear set is a combination of a simple planetary set and a ________ gear set.
A) Simpson B) Reverse C) Spur D) Ravigneaux
Hydrocracking is the use of hydrogen gas to lower the oxygen content of the bio-oil, the same process by which oil refineries treat crude oil
Indicate whether the statement is true or false.To make sites more sustainable by collecting rainwater _____________________
A. water from downspouts and parking lot runoff can be directed to underground storage for later purification and irrigation uses B. permeable and porous pavers can be used to allow water to pass through them to recharge ground water. C. porous asphalt can lessen the amount of water flowing into storm sewers D. all of the above