BASIC ELECTRICAL THEORY FINAL EXAM QUESTIONS AND
ANSWERS
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? - CORRECT ANSWER✅✅✅30,000
degrees Fahrenheit
Electric Motors:
Does the electric motor work on the principle of the attracting and repelling forces of magnetic fields? -
CORRECT ANSWER✅✅✅Yes
Electromagnetic Relay:
Is a holding relay primarily used for worker convenience? - CORRECT ANSWER✅✅✅No
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? - CORRECT ANSWER✅✅✅0%
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? - CORRECT
ANSWER✅✅✅Yes
Sine Wave:
, A nonsinusoidal waveform is created when NONLINEAR loads distort the voltage and current sine wave.
True or false? - CORRECT ANSWER✅✅✅True
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? - CORRECT ANSWER✅✅✅X 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? - CORRECT ANSWER✅✅✅CEMF, Counter-Electromotive force, and Back-EMF
Impedance:
What is the total opposition to current flow in ac circuits and is measured in ohms? - CORRECT
ANSWER✅✅✅impedance
Impedance:
Z is the abbreviation for what? - CORRECT ANSWER✅✅✅Impedance
Current Flow:
Self-induced voltage opposes the change in current flowing in the conductor, is called "inductive
reactance" and is abbreviated how? - CORRECT ANSWER✅✅✅X of l
Dual-Voltage AC Motors:
ANSWERS
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? - CORRECT ANSWER✅✅✅30,000
degrees Fahrenheit
Electric Motors:
Does the electric motor work on the principle of the attracting and repelling forces of magnetic fields? -
CORRECT ANSWER✅✅✅Yes
Electromagnetic Relay:
Is a holding relay primarily used for worker convenience? - CORRECT ANSWER✅✅✅No
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? - CORRECT ANSWER✅✅✅0%
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? - CORRECT
ANSWER✅✅✅Yes
Sine Wave:
, A nonsinusoidal waveform is created when NONLINEAR loads distort the voltage and current sine wave.
True or false? - CORRECT ANSWER✅✅✅True
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? - CORRECT ANSWER✅✅✅X 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? - CORRECT ANSWER✅✅✅CEMF, Counter-Electromotive force, and Back-EMF
Impedance:
What is the total opposition to current flow in ac circuits and is measured in ohms? - CORRECT
ANSWER✅✅✅impedance
Impedance:
Z is the abbreviation for what? - CORRECT ANSWER✅✅✅Impedance
Current Flow:
Self-induced voltage opposes the change in current flowing in the conductor, is called "inductive
reactance" and is abbreviated how? - CORRECT ANSWER✅✅✅X of l
Dual-Voltage AC Motors:
