385 + 45 + 65 + 7 = ____.
A. 482
B. 492
C. 502
D. 512
Answer: C
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The purpose of the defrost cycle in a heat pump is to _____.
a. warm the unit circuits for optimum electrical operation b. prevent ice buildup on the indoor coil c. prevent ice buildup on the outdoor coil d. remove frost buildup throughout the system ductwork
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Duct systems can be plenum, extended plenum, reducing plenum, or perimeter loop.
Answer the following statement true (T) or false (F)
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Insulating material is rated according to its ability to resist the flow of ____.
A. light B. electricity C. heat D. moisture
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____________________, designed to slit the cable sheathing, are used to easily remove the outside sheathing from a nonmetallic sheathed cable.
Fill in the blank(s) with the appropriate word(s).
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