On a geothermal heat pump, it is possible for scale to build up inside the refrigerant lines.
Answer the following statement true (T) or false (F)
False
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Answer the following statement(s) true (T) or false (F)
1. VFDs take the place of magnetic motor starters for all applications. 2. Most VFDs have analog inputs for control. 3. Digital input simply means that the VFD uses electronic circuitry on the inputs that senses only two states, either the control voltage is present on the input, or it is not. 4. Analog inputs are capable of sensing a gradient of different levels of voltage or current, but digital inputs are not. 5. Motor defined input means that the user can program each of the inputs to serve different functions.
Which of the following best describes the term coefficient of friction?
A. The heat rating of friction materials B. The aggressiveness of a friction material C. The longevity of friction materials D. The melting point of friction materials
Why is it important to verify the reported electrical symptom?
a. The problem may be intermittent b. There may be related symptoms not reported by the customer c. The service advisor may have misunderstood the problem d. All of the above are correct
Refer to the figure. Determine the elevation of point C
Fill in the blank(s) with the appropriate word(s).