The electronic defrost board in a packaged heat pump has the correct inputs and outputs to energize the reversing valve, but the valve does not energize. What is the next logical step in the troubleshooting process?
a. Replace the control board.
b. Check the control board further for defects.
c. Check the reversing valve coil.
d. Replace the reversing valve.
c. Check the reversing valve coil.
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Investigating the soils of northern Canada on summer, you dig a soil pit easily though fairly uniform peat material until, at 75 cm deep, your shovel hits a layer that is frozen solid. Into which type of soil are you most likely digging?
A) Cryent B) Histel C) Histosol D) Fibrist E) Cryert
An integral time of 0.5 minutes per repeat equals ____________________ repeats per minute.
Fill in the blank(s) with the appropriate word(s).
Describe the power curve in a graph depicting the relationship of power, current, and voltage.
What will be an ideal response?
Plumbing is
A. piping used for the installation, alteration, repair, or removal of automatic sprinkler systems installed for fire protection only. B. piping used for the incorporation of liquids or gases for any product or process in the manufacturing industry. C. the practice, materials, and fixtures within or adjacent to any building structure or conveyance, used in the installation, maintenance, extension, alteration, and removal of any piping, plumbing fixtures, plumbing appliances, and plumbing appurtenances. D. the initial connection to a potable water supply upstream of any required backflow prevention devices and the final connection that discharges indirectly into a public or private disposal system.