Outside air is drawn into the building through:
A) A calibrated grille in the return air duct. B) An outside air damper.
C) A hole in the air handler cabinet. D) Naturally occurring cracks in the building.
B
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____________________-tine aerifiers can make holes 6 to 16 inches deep
Fill in the blank(s) with correct word
Three designs have been proposed to improve traffic flow at a major intersection in a heavily traveled suburban area. The first alternative involves improved traffic signaling. The second alternative includes traffic-signal improvements and intersection widening for exclusive left turns. The third alternative includes extensive reconstruction, including a grade separation structure. The construction costs, as well as annual maintenance and user costs, are listed in the following table for each alternative. Determine which alternative is preferred based on economic criteria if the analysis period is 20 years and the annual interest rate is 15%. Show that the result is the same using the present worth, equivalent annual cost, benefit– cost ratio, and rate-of-return methods.
What will be an ideal response?
What is the possible consequence of cutting through a bonded roof to install a vent pipe?
A) The HVAC/R contractor could ultimately be liable for any water damage resulting from leaks. B) The vent will not vent correctly when passing through a bonded roof. C) An electrical short will be created between the vent pipe and the bond on the roof. D) Cutting through bonded roofing is safe because the roof is insured.
Isometric drawing are used in detailing piping diagrams.
Answer the following statement true (T) or false (F)