About NEC Article 100 Definitions Quiz
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- This quiz through repetition by design helps you learn the definitions contained in Article 100. It contains only 10 questions generated from a bank of 121 questions. Quick and painless.
- Each time you take the quiz, questions are shuffled and 10 are picked randomly from the bank. The more often you take it the more questions you will be exposed to and the more you will learn the definitions within the National Electrical Code. And you will learn them.
- Pressing the submit button immediately returns your score along with the test questions and correct answer information for those questions you answered wrong. The test results are a very useful study tool.
| Trade Category: | Electrical |
| Test Category: | National Electrical Code |
| Test Subject: | Article 100 Definitions |
| Test Number: | 1 of 1 |
| Questions on Test: | 10 |
| From Bank of: | 121 Questions |
| Randomly Generated: | Yes |
| Test Time: |
#1. In hazardous (classified) locations, separate intrinsically safe circuits are sometimes placed together with other intrinsically safe apparatus and associated apparatus. These systems are called
CORRECT ANSWER INFO:
Correct answer is C: intrinsically safe systems
NEC DEFINITION:
Intrinsically Safe Systems: An assembly of interconnected intrinsically safe apparatus, associated apparatus, and interconnecting cables, in that those parts of the system that may be used in hazardous (classified) locations are intrinsically safe circuits.
Informational Note: An intrinsically safe system may include more than one intrinsically safe circuit.
(Article 100 Definitions: Part I General)
NT COMMENTARY:
“Intrinsicaly safe” is a design term used to indicate a high degree of safety in regards to electric equipment, apparatus or circuitry ability to producing an arc or generate heat that would ignite a flame. This is necessary in many hazardous locations with combustible atmospheres.
Lets not confuse equipment listed as intrinsically safe with equipment listed as explosionproof. Just because a piece of equipment may be designated as intrinsically safe does not mean it is safely capable of withstanding an explosion from within the equipment and protecting personnel in vicinity of that equipment.
#2. What is a device or group of devices that serves to govern, in some predetermined manner, the electric power delivered to the apparatus to which it is connected?
CORRECT ANSWER INFO:
Correct answer is A: Controller
NEC DEFINITION:
Controller: A device or group of devices that serves to govern, in some predetermined manner, the electric power delivered to the apparatus to which it is connected.
(Article 100 Definitions: Part I General)
NT NOTE:
Although the correct answer to this question is Controller, the other answers are also technically correct as they serve the intent of the NEC definition of Controller. They are all controllers.
#3. Which of the following types of circuit breakers is one where no delay is purposely introduced into the tripping action of the circuit breaker?
CORRECT ANSWER INFO:
Correct answer is B: Instantaneous Trip Circuit Breaker
NEC DEFINITION:
Instantaneous Trip Circuit Breaker: A qualifying term indicating that no delay is purposely introduced into the tripping action of the circuit breaker.
(Article 100 Definitions; Part I General)
#4. How does the NEC define a hoistway?
CORRECT ANSWER INFO:
Correct answer is B: Any shaftway. hatchway, well hole, or other vertical opening or space in which an elevator or dumbwaiter is designed to operate.
NEC DEFINITION:
Hermetically Sealed: Any shaftway. hatchway, well hole, or other vertical opening or space in which an elevator or dumbwaiter is designed to operate.
(Article 100 Definitions: Part I General)
#5. What item maintains “The connection between two or more portions of the equipment grounding conductor.” ?
CORRECT ANSWER INFO:
Correct answer is D: Equipment Bonding Jumper
NEC DEFINITION:
Equipment Bonding Jumper: The connection between two or more portions of the equipment grounding conductor.
(Article 100 Definitions; Part I General)
#6. What is an insulated conductor?
CORRECT ANSWER INFO:
Correct answer is B: A conductor encased within material of composition or thickness that is recognized by the Code as electrical insulation.
NEC DEFINITION:
Conductor, Insulated: A conductor encased within material of composition or thickness that is recognized by this Code as electrical insulation.
(Article 100 Definitions: Part I General)
#7. A “Charge Controller” is defined as
CORRECT ANSWER INFO:
Correct answer is C: equipment that controls DC voltage or DC current, or both, and that is used to charge a battery or other energy storage device.
NEC DEFINITION:
Charge Controller: Equipment that controls DC voltage or DC current, or both, and that is used to charge a battery or other energy storage device.
(Article 100 Definitions; Part I General)
#8. According to the NEC, which of the following defines Combustible Dust [as applied to Hazardous (Classified) Locations]?
CORRECT ANSWER INFO:
Correct answer is B: Dust particles that are 500 microns or smaller, and present a fire or explosion hazard when dispersed and ignited in air.
NEC DEFINITION:
Combustible Dust [as applied to Hazardous (Classified) Locations]: Dust particles that are 500 microns or smaller (i.e., material passing a U.S. No. 35 Standard Sieve as defined in ASTM E11-2015, Standard Specification for Woven Wire Test Sieve Cloth and Test Sieves), and present a fire or explosion hazard when dispersed and ignited in air.
(Article 100 Definitions: Part 1 General)
#9. Which of the following terms is defined as “Apparatus in which the circuits are not necessarily nonincendive themselves but that affect the energy in nonincendive field wiring circuits and are relied upon to maintain nonincendive energy levels.” ?
CORRECT ANSWER INFO:
Correct answer is B: Associated Nonincendive Field Wiring Apparatus
NEC DEFINITION:
Associated Nonincendive Field Wiring Apparatus: Apparatus in which the circuits are not necessarily nonincendive themselves but that affect the energy in nonincendive field wiring circuits and are relied upon to maintain nonincendive energy levels.
(Article 100 Definitions; Part I General)
#10. Which of the following terms is defined as “Capable of being removed or exposed without damaging the building structure or finish or not permanently closed in by the structure or finish of the building.” ?
CORRECT ANSWER INFO:
Correct answer is C: Accessible (as applied to wiring methods)
NEC DEFINITION:
Accessible (as applied to wiring methods): Capable of being removed or exposed without damaging the building structure or finish or not permanently closed in by the structure or finish of the building.
(Article 100 Definitions: Part I General)