What was the common choice for hydronic piping in the past and how is that changing?
What will be an ideal response?
The common choice for piping in the past was copper. New materials that are much easier to work with such as cross-linked polyethylene tubing are being used as a substitute.
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Which of the following is required on any building that has parapet walls or any other construction that extends above the roof?
a. controlled-flow systems b. siphonic roof drains c. secondary roof drains d. downspouts
The figure above shows a _____ fitting.
a. 45-degree ell, double line
b. 90-degree ell, double line
c. single-line flange
d. single-line pipe weld
When GK = 4.73 m, determine the length of EK. Round the answer to 3 significant digits.
Fill in the blank(s) with the appropriate word(s).
In older zoning systems that use a master thermostat, the other zone thermostats _____
a. cannot control the system mode of operation b. can control the system mode of operation c. can control the mode but not the zone temperature d. cannot control the mode or the zone temperature