How does the induced draft blower improve furnace efficiency of a natural draft furnace?
A) the combustion gasses can be introduced into the duct system, raising the supply air temperature
B) combustion gasses do not have to be as hot to correctly vent
C) the induced draft motor uses less current than the natural draft motor
D) the induced draft blower makes it possible for furnaces to use larger, more open heat exchangers
Question 2
Seal face distortion can cause _____.
a. misalignment
b. excessive leakage
c. pitting
d. blistering
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Blending inheritance formed the basis of nineteenth-century critiques of evolution by natural select
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