In Rule #1, what do the words “perfect form” mean?
What will be an ideal response?
ANS:
In Rule #1, the words “perfect form” means perfect flatness, straightness, circularity, and cylindricity.
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Explain what corrosive fluxes are and give an example of how they can be used.
What will be an ideal response?
What advantage is there to maintaining a negative pressure on the heat exchanger?
A) The negative pressure helps draw in return air from the house, increasing efficiency. B) Combustion air can only be drawn into the oil burner if a negative pressure is maintained. C) The vent will not work unless the heat exchanger is at a negative pressure. D) Safety; it ensures combustion products do not leak out into the air stream.
Building an eco-friendly building turns out to be financially smart
Indicate whether the statement is true or false
When a manual service valve is frontseated:
A) Both the service port and the line are closed to the system. B) Both the service port and the line are open to the system. C) The service port is closed and the system is open to the line. D) The service port is open and the system is closed to the line.