The loss of a single phase of a polyphase motor can cause _____.
a. bearing damage
b. excessive vibration
c. insulation damage
d. failure of the remaining phase windings
d. failure of the remaining phase windings
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Figure 20-05
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The circuit in the accompanying figure shows a phototransistor used to turn on a relay coil. What is the difference when the phototransistor is in the presence of darkness versus light?
What will be an ideal response?
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The footing is never placed below the depth of possible freezing.
Answer the following statement true (T) or false (F)
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Explain the advantages and disadvantages of a lead-acid battery
What will be an ideal response?
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When a thermocouple is heated, a voltage of __________ is generated.
A. 30 volts dc B. 30 millivolts C. 30 volts ac D. 30 microamps
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