The ____________________ is a mechanical control that keeps the refrigerant pressure in the evaporator from going below a predetermined point.
Fill in the blank(s) with the appropriate word(s).
EPR valve
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It has been wryly observed that "the North won the Civil War, but the South won Reconstruction." Interpret this statement and assess its truth.
What will be an ideal response?
A ____ in a cable can be used as an ungrounded conductor when supplying power to a switch, but not as a return conductor from the switch to the outlet.
A. yellow conductor B. red conductor C. white conductor D. black conductor
What is the annual leak rate of a system that holds 100 lb of refrigerant and loses three lb of refrigerant in a month?
A) 3 percent B) You must check for an entire year to calculate the annual leak rate. C) 36 percent D) The annual leak rate can only be determined at the factory.
What are the advantages of water for use in a thermal storage system?
A) its temperature remains stable when charging and discharging B) water can store more heat per pound than ice or phase change materials C) universal availability and low cost D) water storage takes up less space than ice or phase change materials