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mrs.anderson mrs.anderson
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6 years ago
How is the water flow in a hydronic heating system checked?
 
  A) By measuring the pressure drop across the water pump and comparing it to a pumping performance chart
  B) By measuring the pump motor RPM using a digital tachometer
  C) By measuring the amp draw of the pump motor and applying the formula gp = amps  1.73
  D) By measuring the impeller RPM using a stroboscope

 Q. 2

You can use the ________ on the face of a PLC to determine whether an input switch is on or off.
 
  A) input status indicators B) output status indicators C) power light

 Q. 3

How often should a renewable media, pleated surface be changed?
 
  What will be an ideal response?
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noah.ratliffnoah.ratliff
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6 years ago
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mrs.anderson Author
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#2
6 years ago
Thank you for answering
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