A general definition of refrigerant is:
A) A fluid that can turn heat into mass.
B) A fluid that is naturally cold.
C) The fluid used in a refrigeration system for transferring heat.
D) A hydrocarbon based chemical with noble elements replacing some of the hydrogen atoms.
C
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Whereas charts generally focus on a trend or comparison, ____________________ organize data for the reader to scan in an easy-read-format, or matrix.
Fill in the blank(s) with the appropriate word(s).
In the accompanying figure, if angle 1 = 55o, what is arc HK?
A. 55o B. 80o C. 105o D. 125o
Texture describes the ________ of particles in a soil
A) roughness B) sizes C) mineralogical makeup D) colors E) arrangement
Why are liquid line filter-driers required for all systems using HFC refrigerant?
A) Because the filter-drier is also the metering device in newer systems B) Because the filter-drier also serves as a reservoir for refrigerant C) Because the POE oil used with HFC refrigerant is very hygroscopic D) Because HFC refrigerants often form fluoride crystals inside the system