The rotor frequency can be determined using the formula: ____.
a. 
b. 
c. 
d. 
b.
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An indication that proves all liquid refrigerant has changed into a vapor within the evaporator is _____.
a. the presence of some superheat b. a sudden increase in pressure c. a sudden decrease in pressure d. the presence of some subcooling
Radiator cleaners used to remove rust and scale are alkaline.
Answer the following statement true (T) or false (F)
Potential transformers have highly accurate ratios between the primary and secondary voltage values; generally the error is less than ____________________%.
Fill in the blank(s) with the appropriate word(s).
What does it mean if two signals are said to be in quadrature?
A. At a 90° angle B. Output is zero with no modulation C. One-half that for the Foster–Seeley circuit D. Phase-shift detection arises quite often