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. Which is “An enclosure that is designed for either surface mounting or flush mounting and is provided with a frame, mat, or trim in which a swinging door or doors are or can be hung.” ?
CORRECT ANSWER INFO:
Correct answer is D: Cabinet
NEC DEFINITION:
Cabinet: An enclosure that is designed for either surface mounting or flush mounting and is provided with a frame, mat, or trim in which a swinging door or doors are or can be hung.
(Article 100 Definitions; Part I General)
#2. Which of the following terms is defined in the NEC as “Performing a function without the necessity of human intervention.” ?
CORRECT ANSWER INFO:
Correct answer is D: Automatic
NEC DEFINITION:
Automatic: Performing a function without the necessity of human intervention.
(Article 100 Definitions; Part I General)
#3. Which is the NEC definition of a “Clothes Closet”?
CORRECT ANSWER INFO:
Correct answer is C: A nonhabitable room or space intended primarily for storage of garments and apparel.
NEC DEFINITION:
Clothes Closet: A nonhabitable room or space intended primarily for storage of garments and apparel.
(Article 100 Definitions: Part 1 General)
#4. The NEC defines “concealed” as
CORRECT ANSWER INFO:
Correct answer is B: Rendered inaccessible by the structure or finish of the building.
NEC DEFINITION:
Concealed: Rendered inaccessible by the structure or finish of the building.
Informational Note: Wires in concealed raceways are considered concealed, even though they may become accessible by withdrawing them.
(Article 100 Definitions: Part 1 General)
#5. 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)
#6. Operation of electrical equipment at a substantially constant load for a short and definite specified time is called
CORRECT ANSWER INFO:
Correct answer is D: short-time duty
NEC DEFINITION:
Duty, Short-Time: Operation at a substantially constant load for a short and definite, specified time.
(Article 100 Definitions: Part I General)
NT NOTE:
For the sake of study convenience we list the NEC definitions for types of duty as applied to the cycling of electrical loads:
Duty, Continuous: Operation at a substantially constant load for an indefinitely long time.
Duty, Intermittent: Operation for alternate intervals of (1), load and no load; or (2) load and rest; or (3) load, no load, and rest.
Duty, Periodic: Intermittent operation in which the load conditions are regularly recurrent.
Duty, Short-Time: Operation at a substantially constant load for a short and definite, specified time.
Duty, Varying: Operation at loads, and for intervals of time, both of which may be subject to wide variation.
For the new apprentice electrician and even experienced ones, all this can seem confusing but keep in mind the NEC is for all electricians in different capacities of work. An industrial electrician or one that is part of a facilities management team will understand these terms as they apply to their job more than say an electrician performing residential or commercial construction and service work.
#7. What is defined as the ratio of the maximum demand of a system, or part of a system, to the total connected load of a system or the part of the system under consideration?
CORRECT ANSWER INFO:
Correct answer is A: Demand factor
NEC DEFINITION:
Demand Factor: The ratio of the maximum demand of a system, or part of a system, to the total connected load of a system or the part of the system under consideration.
(Article 100 Definitions: Part I General)
#8. The NEC defines a continuous load as one where the maximum current is expected to continue for
CORRECT ANSWER INFO:
Correct answer is B: 3 hours or more.
NEC DEFINITION:
Continuous Load: A load where the maximum current is expected to continue for 3 hours or more.
(Article 100 Definitions: Part I General)
#9. What is a copper-clad aluminum conductor?
CORRECT ANSWER INFO:
Correct answer is C: A conductor with an aluminum core that has a minimum amount of 10% copper metallurgically bonded to it.
NEC DEFINITION:
Copper-Clad Aluminum Conductors: Conductors drawn from a copper-clad aluminum rod, with the copper metallurgically bonded to an aluminum core, where the copper forms a minimum of 10 percent of the cross-sectional area of a solid conductor or each strand of a stranded conductor.
(Article 100 Definitions: Part I General)
#10. What is the equipment protection called that is provided at current levels less than those required to protect conductors from damage through the operation of a supply circuit overcurrent device?
CORRECT ANSWER INFO:
Correct answer is C: Ground-fault protection of equipment
NEC DEFINITION:
Ground-Fault Protection of Equipment: A system intended to provide protection of equipment from damaging line-to-ground fault currents by operating to cause a disconnecting means to open all ungrounded conductors of the faulted circuit. This protection is provided at current levels less than those required to protect conductors from damage through the operation of a supply circuit overcurrent device.
(Article 100 Definitions: Part I General)