Which type of duct material is used in low-traffic areas and provides insulation to the duct system?
A. galvanized metal
B. fiberglass-wrapped, spiral duct (flexible duct)
C. fiberglass, fiberboard sheeting
D. round sheet metal
Answer: C
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Most CAD drawings are created at a scale of 1:1 (full) and printed at the final desired scale.
Answer the following statement true (T) or false (F)
Which of the following humidifiers are ideal to use with heat pumps, electric furnaces, and high-efficiency furnaces?
A) atomizing B) steam C) evaporating D) bypass
Foundations of wood are referred to as ____ foundations, and they can be fabricated in a shop or on the job site by using wood that is pressure-treated to withstand moisture and pest damage from ground contact.
A. permawood B. woodgrain C. solid wood D. permanent wood
To position a rig for straight-line backing, a driver should move forward until the tractor and trailer are aligned and the front wheels are _____.
Fill in the blank(s) with the appropriate word(s).