Is the barometric loop and effective and practical method of backflow prevention? Why or why not?
What will be an ideal response?
The barometric loop is generally impractical because the piping must extend vertically
35 feet above the highest installed system piping to the connection in question.
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___________________ contacts in a motor control circuit control the path for current flow to the output.
Fill in the blank(s) with the appropriate word(s).
A unique feature of multizone and double-duct systems is that they:
A) Can deliver conditioned air to different zones. B) Will fit in tight spaces. C) Can heat and cool at the same time using a single air handler. D) Operate more efficiently than most other systems.
In addition to green building and energy efficiency programs, some builders opt to provide ____ and comfort guarantees for their homes.
A. utility B. construction C. heating D. quality
To ____________________ a file system is to connect it to the directory tree structure.
Fill in the blank(s) with the appropriate word(s).