Discuss furnace combustion air requirements
What will be an ideal response?
Approximately 10 cubic feet of air per 1000 BTU for perfect combustion. In practice excess air is needed to insure complete combustion. 14 to 15 cubic feet of air per 1000 BTU is used.
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The traditional project delivery system, also frequently referred to as "design-bid-build," has been the most used project delivery system since the late 1800s.
Answer the following statement true (T) or false (F)
The term for starting and stopping a three-phase motor to determine the intended direction of rotation is called _______________.
Fill in the blank(s) with the appropriate word(s).
What do the rungs on a ladder diagram represent?
A) The circuit loads B) The individual circuits C) The line voltage power D) The rungs on each ladder diagram stand for something different.
Which statement about economizers installed with packaged units is correct?
a. All packaged units are equipped with economizers. b. Economizers require at least two compressors. c. Compressors run less with economizers installed. d. Economizers only function in the winter.