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.

Think about photovoltaic systems.

1 / 20

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

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

b. A configuration of transformers used for backup.

c. A series of batteries connected in series.

d. A combination of power and control devices.

The clearance requirement increases when grounded parts are present opposite exposed live parts in the working space.

2 / 20

Exposed live parts on one side of the working space and grounded parts on the other side of the working space must have _______________ clearance in a 277-volt to ground.

a. 3 feet 6 inches

b. 4 feet

c. 2 feet 6 inches

d. 3 feet

Approval requires jurisdictional consent.

3 / 20

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

a. Listed in an NFPA standard.

b. Acceptable to the authority having jurisdiction.

c. Verified by any professional inspector.

d. Certified by the manufacturer.

This definition includes multiple fixture types.

4 / 20

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

a. A room with plumbing fixtures.

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

c. Any room with a sink.

d. A room containing only a toilet.

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

5 / 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 6 inches

b. 4 feet

c. 3 feet

d. 3 feet 6 inches

Safety is a primary concern here.

6 / 20

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

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

b. Insulated to prevent electrical shocks.

c. Enclosed with a protective barrier.

d. Accessible only by qualified personnel.

Think about processes that don’t need human action.

7 / 20

How is "Automatic" defined in Article 100?

a. A process triggered by external signals.

b. A process triggered by external signals.

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

d. A function requiring minimal human intervention.

Focus on detecting and mitigating electrical arcs.

8 / 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.

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

9 / 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 least greater than

c. At least equal to

d. At most, less than

This involves the final section of a circuit.

10 / 20

What does "Branch Circuit" refer to?

a. A circuit running between panels.

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

c. Conductors feeding a transformer.

d. The connection between a main panel and subpanel.

Duration is key here.

11 / 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 with varying current requirements.

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

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

12 / 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. At most, less than

b. At least greater than

c. At least equal to

d. Matching

This device protects against overcurrent.

13 / 20

What is a "Circuit Breaker"?

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

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

c. emergency

d. A fuse used to protect electrical circuits.

Ampacity involves continuous current limits.

14 / 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.

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

15 / 20

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

a. 5 feet

b. 4 feet

c. 6 feet

d. 4 1/2 feet

It ensures electrical continuity.

16 / 20

What does "Bonded" mean?

a. Shielded from electrical interferences.

b. Grounded through a grounding electrode.

c. Connected to establish electrical continuity and conductivity.

d. Insulated to prevent conductivity.

The key is the device's capacity to handle overcurrent within its operational range, which starts from its specified rating.

17 / 20

A branch-circuit OCPD is a device capable of providing protection for service, feeder, and branch circuits and equipment over the full range of over-currents between its _______________ and its interrupting rating.

a. Rated over-current rating

b. Rated voltage

c. Short-circuit

d. Rated current

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

18 / 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 Drop

b. Service Equipment

c. Service Entrance Conductors (Overhead)

d. Service Entrance Conductors (Underground)

This definition includes control of motor speed.

19 / 20

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

a. A power supply that adjusts motor voltages.

b. A device that provides constant speed to motors.

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

d. A power supply that adjusts motor voltages.

This type of equipment directly consumes electric energy to perform its function.

20 / 20

_______________ equipment utilizes electric energy for electronic, electromechanical, chemical, heating, lighting, or similar purposes.

a. Signaling

b. Heating

c. Utilization

d. Cord-and-plug connected

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