Electrical Engineering Questions
Explore questions in the Electrical Engineering category that you can ask Spark.E!
A(n) ______ changes AC current into DC current.
Which NEC table lists the running currents for single-phase AC motors?
Three-phase motors can be constructed to operate in either wye or _______.
The current draw of a precipitator is ______.
The approximate starting current of a squirrel-cage motor can be determined by multiplying the kVA rating listed in Table 430.7(B) by the _______ rating and then dividing by the applied voltage.
Assume that an inductor has an inductive reactance of 100 ohms and the wire has a resistance of 10 ohms. What is the impedance?
An induction motor is much like a(n) ________, except that the secondary winding and core are mounted on a shaft set in bearings.
When the power factor of the plant is 1.0 (unity), the kilovarmeter reads ______.
A three-phase motor contains six poles per phase. The synchronous speed of this motor is _______ RPM when connected to 60 Hz.
In a machine that has a 3-phase motor rated at 460 volts, the current required by that machine is based on the ______ of the motor.
Most dual-voltage motors bring out _______ "T" leads at the terminal box.
Most dual-voltage single-phase motors will be of the _______ type, which contains both run and starting windings
__________ motors are often made to have a leading power factor by over-excitation of the rotor current.
Direct-current compound motors contain a rotating armature and a(n) _________ field.
a synchronous-type motor is operated at 90 percent power factor, the rated full-load current in the table is to be _______.
When two parallel feeders are installed to each of the synchronous condensers, the conductors can be sized for _______ the value of the required ampacity.
SCRs and GTOs are ______ and have the ability to handle a greater amount of current than transistors.
Most common squirrel-cage motors used in industry fall into the design _____ classification.
When a two-phase, three-wire system is used, the size of the neutral conductor must be increased by _______.
A factor that determines the amount of current a conductor is permitted to carry if the type of _________ used, which is the nonconductive covering around the wire