Basic Electrical Theory Final Exam Questions & Answers(RATED A)
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Course
Basic Electrical Theory
Institution
Basic Electrical Theory
Electricity:
An electrical arc blast can vaporize metal parts and produces an explosive and deadly pressure wave. How many degrees fahrenheit can an electrical arc blast reach? - ANSWER30,000 degrees Fahrenheit
Electric Motors:
Does the electric motor work on the principle of the attractin...
Basic Electrical Theory Final Exam Questions &
Answers(RATED A)
Electricity:
An electrical arc blast can vaporize metal parts and produces an explosive and deadly pressure wave.
How many degrees fahrenheit can an electrical arc blast reach? - ANSWER30,000 degrees Fahrenheit
Electric Motors:
Does the electric motor work on the principle of the attracting and repelling forces of magnetic
fields? - ANSWERYes
Electrostatic charge is due to an excess of, or a deficiency of, electrons between objects that have
been separated. True or False? - ANSWERTrue
Lightning protection is intended to protect the building itself, as well as the electrical equipment on
or inside the structure. True or False? - ANSWERFalse
Electromagnetic Relay:
Is a holding relay primarily used for worker convenience? - ANSWERNo
Current Flow On The Neutral Conductor:
A balanced 3-wire, 120/240, single-phase circuit is connected so that the ungrounded conductors are
from different transformer phases (line 1 and Line 2.) The current on the neutral conductor will be
how much percent of the ungrounded conductor current? - ANSWER0%
Interrupting Rating:
, If the protection device is not rated to interrupt the current at the available fault values at its listed
voltage rating, it can explode while attempting to clear the fault correct? - ANSWERYes
Sine Wave:
A nonsinusoidal waveform is created when NONLINEAR loads distort the voltage and current sine
wave. True or false? - ANSWERTrue
Phase Relationship:
The opposition offered to the flow of ac current by a capacitor is called "capacitive reactance," which
is expressed in ohms and abbreviated how? - ANSWERX of c
Induced Voltage and Applied Current:
The induced voltage in a conductor carrying alternating current opposes the change in current
flowing through the conductor. The induced voltage that opposes the current flow is interchangeably
called what three things? - ANSWERCEMF, Counter-Electromotive force, and Back-EMF
Impedance:
What is the total opposition to current flow in ac circuits and is measured in ohms? -
ANSWERimpedance
Impedance:
Z is the abbreviation for what? - ANSWERImpedance
Current Flow:
Self-induced voltage opposes the change in current flowing in the conductor, is called "inductive
reactance" and is abbreviated how? - ANSWERX of l
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