Speed control for a wound rotor motor is obtained by placing ____________________ in the secondary or rotor circuit.
Fill in the blank(s) with the appropriate word(s).
resistance
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One of the disadvantages of the secondary-fluid refrigeration systems is ____.
A. greater leak potential B. more critical piping C. longer defrost periods D. higher cost of the equipment
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In a closed-loop system, the plastic water pipes that are buried in the Earth are called ____.
A. ground loops B. thermal loops C. water loops D. both a and c
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A diode installed across a coil with the cathode toward the battery positive is called a(n) ________
A) Transistor B) Forward-bias diode C) Clamping diode D) SCR
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Critical burns are second-degree burns covering what percentage of BSA (Body Surface Area)?