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 combination of power and control devices.

c. A series of batteries connected in series.

d. A configuration of transformers used for backup.

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. 4 feet

b. 3 feet 6 inches

c. 2 feet 6 inches

d. 3 feet

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

3 / 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. Short-circuit

c. Rated current

d. Rated voltage

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

4 / 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 least greater than

b. Matching

c. At most, less than

d. At least equal to

This relates to ease of physical access for maintenance.

5 / 20

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

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

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

c. Capable of being reached only by trained professionals.

d. Capable of being reached quickly without using tools.

This involves the final section of a circuit.

6 / 20

What does "Branch Circuit" refer to?

a. The connection between a main panel and subpanel.

b. A circuit running between panels.

c. Conductors feeding a transformer.

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

The AHJ oversees code compliance.

7 / 20

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

a. A licensed inspector hired for code compliance.

b. A federal agency responsible for all code enforcement.

c. A federal agency responsible for all code enforcement.

d. A third-party testing agency.

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

8 / 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. Cutout box

b. Panelboard

c. Cabinet

d. Switchgear

Safety is a primary concern here.

9 / 20

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

a. Accessible only by qualified personnel.

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

c. Enclosed with a protective barrier.

d. Insulated to prevent electrical shocks.

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

10 / 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. 3 feet 6 inches

c. 4 feet

d. 3 feet

Think about processes that don’t need human action.

11 / 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.

This definition includes multiple fixture types.

12 / 20

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

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

b. A room containing only a toilet.

c. A room with plumbing fixtures.

d. Any room with a sink.

An attachment plug is commonly used to connect a flexible cord to a power source.

13 / 20

An attachment plug is a(n):

a. Device that controls AC/DC voltage or AC/DC current, or both, and is used to charge a battery or other energy storage device

b. A fitting intended to terminate a cord to a box or similar device and reduce the strain points of termination

c. Device that, by insertion in a receptacle, establishes a connection between the conductors of the attached flexible cord and the conductors connected permanently to the receptacle

d. Device designed to open and close a circuit by nonautomatic means

Backup power is a key concept here.

14 / 20

What is an "Alternate Power Source"?

a. A public utility service always running in parallel.

b. A set of transformers used for backup power.

c. A combination of multiple energy sources for efficiency.

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

Approval requires jurisdictional consent.

15 / 20

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

a. Certified by the manufacturer.

b. Listed in an NFPA standard.

c. Acceptable to the authority having jurisdiction.

d. Verified by any professional inspector.

Duration is key here.

16 / 20

How is "Continuous Load" defined?

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

b. A load with varying current requirements.

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

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

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

17 / 20

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

a. Heating

b. Signaling

c. Cord-and-plug connected

d. Utilization

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

18 / 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 most, less than

d. At least equal to

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. A power supply that adjusts motor voltages.

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

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

20 / 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

Your score is

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Pos.	Name	Score	Duration
1	ericyd	85 %	17 minutes 41 seconds
2	Guest	75 %	6 minutes 11 seconds
3	Guest	75 %	8 minutes 22 seconds
4	Guest	75 %	14 minutes 46 seconds
5	Guest	60 %	13 minutes 52 seconds
6	eep	32 %	1 minutes 6 seconds

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