?How much energy is needed from the circulator in a closed-loop hydronic system?

A. ?It depends on the elevation of the system.
B. ?It depends on the weight of the fluid.
C. ?Enough is needed to sustain a flow rate of 2 to 4 gallons per minute.
D. ?Enough is needed to replace the energy of head loss.


Answer: D

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The subsequent problems deal with the circuit below where the preset and clear features operate based on positive logic (i.e., they are "active high"), which is not the standard convention.Note: Each question is independent and doesn't depend on results from previous questions. The only values known initially are the values provided in each question.When R=0, C=0, and L changes from 0 to 1, the output X

A. is uncertain B. toggles regardless of its value C. remains unchanged (regardless of whether the initial value is 0 or 1) D. becomes (or remains) 1 E. becomes (or remains) 0

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For each part of the job, the concrete cover is determined by the _____

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The formula for total current in a series circuit is ____.

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What will be an ideal response?

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