Article 100-110 Quiz02 – Electrician Exam Practice

Article 100-110 Quiz02

This quiz includes 20 questions selected from NEC Articles 100 to 110. The questions are chosen randomly, with no repeats from other quizzes—unless a particular question is used again on purpose because it relates to more than one topic, such as both cable ampacity and cable application.

If you spot any issues or have suggestions, you’re welcome to report questions or review the quiz. Your feedback matters, and contributions to help improve and refine the questions and quizzes are always appreciated.

This involves the final section of a circuit.

1 / 20

What does "Branch Circuit" refer to?

a. Conductors feeding a transformer.

b. A circuit running between panels.

c. The circuit conductors between the final overcurrent device and the outlets.

d. The connection between a main panel and subpanel.

This relates to ease of physical access for maintenance.

2 / 20

What does the term "Accessible" as applied to equipment mean?

a. Capable of being reached quickly without using tools.

b. Capable of being reached for operation, renewal, and inspection without removing any part of the equipment.

c. Capable of being reached for operation, renewal, and inspection.

d. Capable of being reached only by trained professionals.

This type of enclosure is designed for ease of access to the electrical components it houses.

3 / 20

A _______________ is an enclosure designed for surface mounting that has swinging doors or covers secured directly to and telescoping with the walls of the enclosure.

a. Switchgear

b. Cutout box

c. Panelboard

d. Cabinet

This definition includes multiple fixture types.

4 / 20

What is a "Bathroom" as defined in Article 100?

a. A room containing only a toilet.

b. A room with plumbing fixtures.

c. An area including a sink with one or more of the following: a toilet, a urinal, a tub, a shower, or similar plumbing fixtures.

d. Any room with a sink.

For wide switchgear and control panels, the NEC mandates adequate access to ensure safety and compliance with clearance requirements.

5 / 20

On switchgear and control panels exceeding _______________ in width, there shall be one entrance at each end of the equipment.

a. 6 feet

b. 4 1/2 feet

c. 5 feet

d. 4 feet

It ensures electrical continuity.

6 / 20

What does "Bonded" mean?

a. Shielded from electrical interferences.

b. Grounded through a grounding electrode.

c. Insulated to prevent conductivity.

d. Connected to establish electrical continuity and conductivity.

Ampacity involves continuous current limits.

7 / 20

What does "Ampacity" refer to?

a. The resistance offered by a conductor at rated temperature.

b. The short-circuit current a conductor can sustain.

c. The maximum current, in amperes, that a conductor can carry continuously under the conditions of use without exceeding its temperature rating.

d. The minimum voltage a conductor can handle continuously.

Think about processes that don’t need human action.

8 / 20

How is "Automatic" defined in Article 100?

a. A process triggered by external signals.

b. Performing a function without the necessity of human intervention.

c. A process triggered by external signals.

d. A function requiring minimal human intervention.

Duration is key here.

9 / 20

How is "Continuous Load" defined?

a. A load that operates continuously but below maximum capacity.

b. A load where the maximum current is expected to continue for 3 hours or more.

c. A load that operates for less than 1 hour.

d. A load with varying current requirements.

This definition applies specifically to conductors used in overhead service installations.

10 / 20

The service conductors between the terminals of the service equipment and a point usually outside the building, clear of building walls, where joined by tap or splice to the service drop or overhead service conductors, is defined as what?

a. Service Entrance Conductors (Underground)

b. Service Entrance Conductors (Overhead)

c. Service Drop

d. Service Equipment

This device protects against overcurrent.

11 / 20

What is a "Circuit Breaker"?

a. A fuse used to protect electrical circuits.

b. A device that controls voltage variations in a circuit.

c. emergency

d. A device designed to open and close a circuit automatically or manually and to open the circuit automatically on overcurrent.

Backup power is a key concept here.

12 / 20

What is an "Alternate Power Source"?

a. One or more generator sets or battery systems intended to provide power during interruption of the normal electrical service.

b. A public utility service always running in parallel.

c. A combination of multiple energy sources for efficiency.

d. A set of transformers used for backup power.

Think about photovoltaic systems.

13 / 20

What is an "Array" as defined in Article 100?

a. A configuration of transformers used for backup.

b. A mechanically and electrically integrated grouping of modules with support structure, including attached system components.

c. A series of batteries connected in series.

d. A combination of power and control devices.

The AHJ oversees code compliance.

14 / 20

What is an "Authority Having Jurisdiction (AHJ)"?

a. A licensed inspector hired for code compliance.

b. A third-party testing agency.

c. A federal agency responsible for all code enforcement.

d. A federal agency responsible for all code enforcement.

The minimum working distance is determined by the voltage and whether live or grounded parts are present on the opposite side of the workspace.

15 / 20

A 120-208V 3-phase panel with exposed live parts on one side, and no live or grounded parts on the other side of the working space, must have a minimum clear working distance of _______________ in front of the panel.

a. 4 feet

b. 4 feet 6 inches

c. 3 feet

d. 3 feet 6 inches

This definition includes control of motor speed.

16 / 20

How is "Adjustable Speed Drive" defined in the NEC?

a. A power supply that adjusts motor voltages.

b. A power supply that adjusts motor voltages.

c. Power conversion equipment that provides a means of adjusting the speed of an electric motor.

d. A device that provides constant speed to motors.

Safety is a primary concern here.

17 / 20

What does "Dead-Front" mean in electrical equipment?

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

b. Enclosed with a protective barrier.

c. Accessible only by qualified personnel.

d. Insulated to prevent electrical shocks.

Focus on detecting and mitigating electrical arcs.

18 / 20

What is the primary function of an "Arc-Fault Circuit Interrupter (AFCI)"?

a. To serve as a backup overcurrent device.

b. To monitor voltage stability in high-power circuits.

c. To provide protection from the effects of arc faults by de-energizing the circuit when detected.

d. To disconnect circuits during overcurrent conditions.

Approval requires jurisdictional consent.

19 / 20

What is the meaning of "Approved" in NEC terminology?

a. Verified by any professional inspector.

b. Acceptable to the authority having jurisdiction.

c. Certified by the manufacturer.

d. Listed in an NFPA standard.

The interrupting rating must be sufficient to handle the maximum current the equipment may encounter without failure.

20 / 20

Equipment intended to interrupt current at other than fault levels shall have an interrupting rating at nominal circuit voltage _______________ the current that must be interrupted.

a. Matching

b. At most, less than

c. At least greater than

d. At least equal to

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