1. The primary purpose of the text is to
[A] explain the differences in the working of a heat pump when theoutdoor temperature changes.
[B] contrast the heating and the cooling modes of heat pumps.
[C] describe heat pumps, their use, and factors affecting their use.
[D] advocate the more widespread use of heat pumps.
2. The author resolves the question of whether heat pumps run counter tothe principle of energy conservation by
[A] carefully qualifying the meaning of that principle.
[B] pointing out a factual effort in the statement that gives rise tothis question.
[C] supplying additional relevant facts.
[D] denying the relevance of that principle to heat pumps.
3. It can be inferred from the text that, in the course of a heatingseason, the heating capacity of a heat pump is greatest when
[A] heating is least essential.
[B] electricity rates are lowest.
[C] its compressor runs the fastest.
[D] outdoor temperatures hold steady.
4. If the authors assessment of the use of heat pumps is correct, which ofthe following best expresses the lesson that advertisers should learn from thiscase?
[A] Do not make exaggerated claims about the products you are trying topromote.
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