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
Three principle forms of natural selection: (a) stabilizing selection, (b) directional selection, an
Continuous variation in a natural population
Rotating Furnace for Making Parabolic Telescope Mirrors
Exercises and Activities That Can Improve Cardiorespiratory Fitness
Structural similarities between antimetabolites and their natural counterparts.
Beer is made from the fermentation of yeast and the natural sugars from grains