Some heat pump systems when not capable of meeting the heating needs of the structure are equipped with second-stage heat, called ____________________.
Fill in the blank(s) with the appropriate word(s).
auxiliary heat
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Fill in the blank(s) with the appropriate word(s).
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A thermostat can fail in which way?
A) Stuck closed B) Stuck partially open C) Stuck open D) Any of the above
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What do modern hydronic systems use to circulate the hot water?
A) convection B) gravity C) pumps D) fans
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People maintain their steady internal body temperature by:
A) Producing exactly the amount of heat needed to maintain body temperature. B) Producing more internal heat than needed and expelling the extra heat. C) Adjusting our internal temperature to the surrounding conditions. D) Sunning ourselves on radiant surfaces.
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