What type of vent is used with 90 percent Category IV furnaces?
A) PVC
B) Type B double-wall gas vent
C) 90 percent efficiency furnaces do not require a vent.
D) Single-wall stainless steel
A
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Those people most adamantly opposed to President James K. Polk's expansionist program in Oregon, Texas and the Southwest were the
A. northwestern Democrats. B. abolitionists. C. southern Democrats. D. generals in the U.S. Army such as General Zachary Taylor. E. pro-slavery Whigs.
Which of the following breeds of sheep is known for its superior long, staple wool?
a. Debouillet b. Corriedale c. Merino d. Rambouillet
The cells on most electronic air cleaners can be cleaned:
A) By spraying them in place with an air conditioning coil cleaner. B) By spraying them in place using a solvent that is certified to be high in volatile organic compounds. C) In the dishwasher. D) With a fine grit emery cloth.
How does dark field lighting work?
What will be an ideal response?