When using a heat pump thermostat, the first stage is always the __________.
A. heat pump
B. electric heating elements
C. fossil fuel system
D. any of the above
Answer: A
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A perfect solar site allows the structure to have unobstructed ____ exposure.
A. northern B. southern C. eastern D. western
_______________________ facilitates the spreading of lubricant film into narrow spaces between equipment components.
Fill in the blank(s) with the appropriate word(s).
Fitting pipe together and holding it in place for welding become more difficult as the diameter of the pipe gets larger.
Answer the following statement true (T) or false (F)
The type of anchor that has a cutting sleeve, which is used first as a drill bit and later becomes the expandable anchor itself is a(n) _____.
a. self-drilling anchor b. expansion anchor c. drop-in anchor d. self-threading anchor