Why are the coils in an air-source heat pump referred to as the outdoor coil and indoor coil instead of the condenser and evaporator?
A) Because both the coils in a heat pump coils are identical.
B) It can sometimes be difficult to determine the exact location of the coils.
C) Refrigerant does not evaporate or condense in a heat pump coil.
D) Their function (evaporator or condenser) reverses when the unit changes from cooling to heating.
D
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A(n) ____________________ of enclosure can only be used where there were no problems of moisture, dust, or explosive fumes.
Fill in the blank(s) with the appropriate word(s).
The term ____ is used to refer to a particular arrangement of rooms or design.
A. plan B. elevation C. zone D. phase
A refrigerant sensor that changes conductivity when exposed to refrigerant is:
A) Photoacoustic infrared (PIR). B) Diffusion infrared. C) Ceramic metal oxide semi-conductor (CMOS). D) Infrared nondispersive (NDIR).
The center-to-center spacing of plug welds is called ____________________.
Fill in the blank(s) with the appropriate word(s).