In a conventional gas furnace, the hot flue gases are ____.
A. forced out a PVC vent with a blower
B. recycled through a secondary heat exchanger and then vented through a draft diverter
C. forced through a type B vent by a blower
D. vented by natural convection
Answer: D
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Fill in the blank(s) with the appropriate word(s).
Find the resultant of the concurrent forces R and S for which the direction is specified by slope, expressed as rise and run values. Show a sketch of R and S and the resultant.
 FIGURE 1.png)
What is accomplished by having a compressor that is equipped with unloaders?
What will be an ideal response?
The ____ is sent to the final control element.
A. measured variable B. feedback signal C. error signal D. control signal