?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
For each part of the job, the concrete cover is determined by the _____
a. architect b. local codes c. structural engineer d. concrete contractor
The formula for total current in a series circuit is ____.
A. IT = IR1 = IR2 = IR3 ...= IRn B. IT = IR1 + IR2 + IR3 ...+ IRn C. 1/ IT = 1/IR1 + 1/IR2 + 1/IR3 ...+ 1/IRn D. IT = IR1 - IR2 - IR3 ...- IRn
Define work.
What will be an ideal response?