NEC Article 100 Definitions Quiz

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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:

Results

#1. What is a dead front?

Without live parts exposed to a person on the operating side of the equipment.

An impotent electrician.

Extreme weather patterns such as a series of tornado's wiping out everything in its path with death and destruction causing major electrical surging and blowing out substation switchgear. It is oddly often followed by a tropical front.

The front of energized switchgear when an inexperienced person gets hung up on live parts.

CORRECT ANSWER INFO:

Correct answer is A: Without live parts exposed to a person on the operating side of the equipment.

NEC DEFINITION:

Dead Front: Without live parts exposed to a person on the operating side of the equipment.

(Article 100 Definitions: Part I General)

#2. What is the term used for the highest current at rated voltage that a device is identified to interrupt under standard test conditions?

Overload rating

Ampere rating

System rating

Interrupting rating

CORRECT ANSWER INFO:

Correct answer is D: Interrupting rating

NEC DEFINITION:

Interrupting Rating: The highest current at rated voltage that a device is identified to interrupt under standard test conditions.

Informational Note: Equipment intended to interrupt current at other than fault levels may have its interrupting rating implied in other ratings, such as horsepower or locked rotor current.

(Article 100 Definitions: Part I General)

#3. Which of the following terms refers to enclosures constructed so that dust will not enter under specified test conditions?

Watertight

Weathertight

Weatherproof

Dusttight (duh)

CORRECT ANSWER INFO:

Correct answer is D: Dusttight

NEC DEFINITION:

Dusttight: Enclosures constructed so that dust will not enter under specified test conditions.

Informational Note No. 1: Enclosure Types 3, 3S, 3SX, 4, 4X, 5, 6, 6P, 12, 12K, and 13, per ANSI/NEMA 250-2014, Enclosures for Electrical Equipment, are considered dusttight and suitable for use in unclassified locations and in Class II, Division 2, Class III; and Zone 22 hazardous (classified) locations.

Informational Note No. 2: For further information, see ANSI/ISA-12.12.01-2013, Nonincendive Electrical Equipment for Use in Class I and II, Division 2, and Class III, Divisions 1 and 2 Hazardous (Classified) Locations.

(Article 100 Definitions: Part I General)

#4. Exposed (as applied to live parts) is defined as

Out in the open in plain sight.

On or attached to the surface or behind panels designed to allow access.

Capable of being inadvertently touched or approached nearer than a safe distance by a person.

Capable of being seen after you rip the wall apart.

CORRECT ANSWER INFO:

Correct answer is C: Capable of being inadvertently touched or approached nearer than a safe distance by a person.

NEC DEFINITION:

Exposed (as applied to live parts): Capable of being inadvertently touched or approached nearer than a safe distance by a person.

Informational Note: The term applies to parts that are not suitably guarded, isolated, or insulated.

(Article 100 Definitions: Part I General)

NT Note:

So there are two definitions of exposed in the NEC. The first is as applied to live parts and the second is as applied to wiring methods.

We list it here for your convenience:

Exposed (as applied to wiring methods): On or attached to the surface or behind panels designed to allow access.

(Article 100 Definitions: Part I General)

#5. The term “solidly grounded” means

Connected to ground without inserting any resistor or impedance device.

Conducting yourself in sensible ways and setting goals to achieve your own dreams.

Placing adequate torque on the grounding bus scews.

Making sure you pound the grounding electrode into the earth all the way.

CORRECT ANSWER INFO:

Correct answer is A: Connected to ground without inserting any resistor or impedance device.

NEC DEFINITION:

Grounded, Solidly: Connected to ground without inserting any resistor or impedance device.

(Article 100 Definitions: Part I General)

#6. The NEC defines a continuous load as one where the maximum current is expected to continue for

24 hours

3 hours or more.

at least 1 hour.

as long as the switch is on.

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)

#7. What do you call an accessory such as a locknut, bushing, or other part of a wiring system that is intended primarily to perform a mechanical rather than an electrical function?

Device

Accessory

System Component

Fitting

CORRECT ANSWER INFO:

Correct answer is D: Fitting

NEC DEFINITION:

Fitting: An accessory such as a locknut, bushing, or other part of a wiring system that is intended primarily to perform a mechanical rather than an electrical function.

(Article 100 Definitions: Part I General)

#8. What is electric-discharge lighting as defined by the NEC?

Fluorescent light fixtures.

HID fixtures such as high-pressure sodium and metal-halide.

Neon tubing lights/signs.

Systems of illumination utilizing fluorescent lamps, high-intensity discharge (HID) lamps, or neon tubing.

CORRECT ANSWER INFO:

Correct answer is D: Systems of illumination utilizing fluorescent lamps, high-intensity discharge (HID) lamps, or neon tubing.

NEC DEFINITION:

Electric-Discharge Lighting: Systems of illumination utilizing fluorescent lamps, high-intensity discharge (HID) lamps, or neon tubing.

(Article 100 Definitions: Part I General)

#9. Regarding an electrical circuit, what is meant when it is said to be “grounded”?

When a conductive rod is stuck into the ground.

Connected to the green screw in the box.

When the neutral is bonded to the grounding electrode conductor.

Connected to ground or to a conductive body that extends the ground connection.

CORRECT ANSWER INFO:

Correct answer is D: Connected to ground or to a conductive body that extends the ground connection.

NEC DEFINITION:

Grounded (Grounding): Connected (connecting) to ground or to a conductive body that extends the ground connection.

(Article 100 Definitions: Part I General)

NT NOTE:

While each of the answers can be technically correct in that they are examples of “grounded” as applied in practical field terminology, the correct answer for this quiz question is D because it is the NEC definition of grounded.

#10. When a piece of equipment is said to be externally operable, it is

capable of being operated without exposing the operator to contact with live parts.

designed to be operated from outside the building.

radio-controlled.

operated with the handle on the equipment.

CORRECT ANSWER INFO:

Correct answer is A: capable of being operated without exposing the operator to contact with live parts.

NEC DEFINITION:

Externally Operable: Capable of being operated without exposing the operator to contact with live parts.

(Article 100 Definitions: Part I General)

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