What causes soot buildup in the heat exchanger and vent?
A) Soot buildup is caused by incomplete combustion.
B) Soot buildup is caused by using high-carbon fuel oil.
C) Soot buildup is caused by low indoor air flow.
D) Soot buildup is a normal consequence of any combustion process.
A
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What components would be contained in a typical post-2007 exhaust gas aftertreatment system?
A. oxidizing catalytic converter B. diesel particulate trap C. muffler D. all of the above
? Identify and state the historical significance of John Quincy Adams.
What will be an ideal response?
____ windows have sashes that slide horizontally in separate tracks located on the header jamb and sill.
a.Casement b.Single-hung c.Sliding d.Double-hung
The operating point of two pumps "A" in series in system "B" is:
a. 2 b. 3 c. 4 d. 5 e. 6