One advantage that steam systems have over hot water systems is that steam systems do not require:
A) TXV valves. B) Circulating pumps.
C) Bypass valves. D) Compressor unloaders.
B
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Stepped ____________________ are often used to control heater blower fan speeds.
Fill in the blank(s) with the appropriate word(s).
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Without _________________________ voltage, there is no low voltage.
Fill in the blank(s) with the appropriate word(s).
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List three of the organizations identified in this chapter as sources of information concerning careers in agriculture
What will be an ideal response?
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Which substance is not found in CFC refrigerants?
a. Chlorine b. Carbon c. Fluorine d. Hydrogen
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