A motor takes a current of 8 amps per leg on a 440-volt, 3-phase circuit. The power factor is 0.75. What is the load in watts? Carry the answer to two decimal places.
Fill in the blank(s) with the appropriate word(s).
4572.61
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Solder under the insulation is referred to as ____________________.
Fill in the blank(s) with the appropriate word(s).
Capacitor-start capacitor-run motors that are not hermetically sealed contain a centrifugal switch to disconnect the start capacitor when the motor reaches about ____% of its full load speed.
a. 25 b. 50 c. 75 d. 90
If a crane or load comes in contact with power lines, the crane operator should _____.
a. stay in the cab of the crane if possible b. exit the crane very slowly and cautiously c. exit the crane as quickly as possible d. activate the boom guard
Which of the following statements is true when comparing the series and shunt field windings of a DC motor?
A. The shunt winding must handle more current than the series winding. B. The shunt winding handles an equal amount of current as the series winding. C. The series winding handles more current than the shunt winding. D. The series winding handles less current than the shunt winding.