Explain how inductance is used in the operation of a transformer
What will be an ideal response?
Inductance occurs when the AC sine wave in the primary winding of a transformer creates a strong magnetic field with a large number of flux lines. When the AC sine wave collapses, the flux lines collapse and cut across the secondary windings. When this occurs, voltage is induced into the secondary winding.
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What does an orifice plate use to create a measurable pressure drop?
a. Pressure taps b. A movable pressure plate c. A fixed-area restriction d. Variable vanes on a plate
A(n) ____________________ range is the temperature range in which a metal is partly solid and partly liquid as it is heated or cooled.
Fill in the blank(s) with the appropriate word(s).
10. Using the above diagram and assuming all dimensions are in inches, find the length of dimension A in inches.
What will be an ideal response?
Many pieces of air conditioning service equipment can do all of the following, EXCEPT:
A. refrigerant recovery. B. refrigerant recycling. C. refrigerant reclaiming. D. system evacuation.