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Course 59983
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Contactors that contain blow out coils are most often used on ____.
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If a transformer has a 3:1 turns ratio and the primary voltage is 120 volts, the secondary voltage is ____.
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If a control transformer with two primary windings is used to step down an incoming voltage by a ratio of 4:1, ____.
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How many current sensing devices are required by the National Electrical Code to protect a three-phase motor operated on 480 volts?
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How many current sensing devices are required by the National Electrical Code to protect a single-phase motor operated on 240 volts?
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Concerning the electronic type of magnetic overload relay, what device is used to sense the amount of motor current?
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Assume that a push-button type manual starter has tripped on overload. What should be done to reset the starter?
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If a control transformer with two primary windings is used to step down an incoming voltage in half, ____.
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How is it possible to change the current setting for thermal type overload relays?
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Hysteresis loss is proportional to the ____.
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