Chilled water systems use a primary refrigerant to remove heat from a secondary refrigerant in a chiller unit. What is the secondary refrigerant in such systems?
A) Water B) R-22 C) R-134A D) Ammonia
A
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A(n) ____________________ changes resistance in response to temperature.
Fill in the blank(s) with the appropriate word(s).
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The topmost horizon in most humid region forest soils is the A horizon
Indicate whether the statement is true or false
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A driveshaft is also called a ________
A) Prop shaft B) Propeller shaft C) Center shaft D) Both A and B
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Carry the answer to three decimal places. If W=3.000 inches, Y=1.750 inches, and Z=0.875 inch, find X.
Fill in the blank(s) with the appropriate word(s).
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