The efficiency of a heat pump decreases as the outdoor temperature drops, and at a certain point, called the _____________________, the heat pump can no longer supply enough heat to properly condition the structure.
Fill in the blank(s) with the appropriate word(s).
balance point
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Whenever piping moves vertically, it must be supported by a _____ that will support the piping while allowing vertical movement.
a. pipe saddle b. beam clamp c. pipe hanger d. pipe ring
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Which of the following commercial loads can be fed from a regular circuit rather than an emergency circuit?
a. Exit lights b. Life safety systems c. Fire alarm systems d. Computer equipment
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When used in control cable, which of the following must be grounded in order to be effective?
a. Drain wires b. Crimp connectors c. Conductors d. Screw terminals
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At sea level 14.7 psi of atmospheric pressure will support how many inches of water? Given: water = .433 psi.
What will be an ideal response?
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