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If a box is to contain four No. 10 conductors and two No. 12 conductors, what is the minimum sized box that can be used in cubic inches?
Which of the following is reduced by using silicon steel material for core of the transformers:
When more starting torque is needed, a start _____ is added to the motor:
Which of the following materials are used in making resistors:
The phenomenon in which the a.c. current flowing on the surface of the conductor is:
______ create an alternating frequency that can be varied
A centrifugal switch is used to take out the starting winding out of the circuit once the motor reaches ____ of its rated speed:
Compressors used in refrigeration applications normally requires motors with _____ starting torque:
Which of the following insulation class has highest permissible temperature withstand value:
______ are caused by the reluctance of the iron core to change polarity with changes in current direction and resultant changes in magnetic field polarity:
Service factor is actually reserve horsepower for the motor:
Which of the following is a self starting motor:
3-phase induction motor
Which of the following is not a type of service disconnect?
The total load on any single overcurrent device in a panelboard must not exceed 80 percent of its capacity where the load continues for 3 or more hours to avoid overheating of the conductor.