Article 100-110 Quiz01

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.

Markings must be clear and long-lasting.

1 / 20

What does Article 110.21(B) specify about field-applied hazard
markings?

a. They must be handwritten.

b. Only colors are required for warning labels.

c. They must be durable and convey effective warnings.

d. They are optional for small installations.

It pertains to dust ingress under certain conditions.

2 / 20

What does "Dusttight" mean?

a. Enclosures constructed to prevent dust entry under specific test conditions.

b. Enclosures that can be cleaned without opening.

c. Enclosures that prevent any dust from entering.

d. Enclosures for outdoor use.

The article sets broad standards for electrical installations.

3 / 20

What is covered under Article 110?

a. Requirements for grounding electrodes.

b. General requirements for installation, use, and access to electrical conductors and equipment.

c. General requirements for overcurrent protection.

d. Provisions for motor control systems.

Identification ensures safety in multi-phase systems.

4 / 20

What does Article 110.15 require for high-leg conductors in a 4-wire
delta system?

a. They must be grounded.

b. They must be marked with a yellow stripe.

c. They must be marked with an orange finish.

d. They require no special marking.

ESS involves storing and supplying energy.

5 / 20

How is "Energy Storage System (ESS)" defined?

a. One or more devices capable of storing energy and providing electrical energy into the premises wiring system or a power network.

b. A power generation system.

c. A capacitor bank for power stability.

d. A battery backup for critical loads.

Accurate torque ensures secure and reliable connections.

6 / 20

What does Article 110.14(D) specify about terminal connection torque?

a. Torque values are optional for small installations.

b. Proper tools or devices must be used to achieve indicated torque values.

c. Torque must only be estimated during installation.

d. Connection torque applies only to aluminum conductors.

Safety depends on preventing accidental contact with live parts.

7 / 20

What does Article 110.27 mandate about guarding live parts?

a. Live parts must be elevated above 10 feet.

b. Live parts must always be enclosed.

c. Live parts must be guarded against accidental contact.

d. Guarding is optional for low-voltage systems.

The NEC allows multiple conductor materials.

8 / 20

What materials are generally permitted for electrical conductors?

a. Only copper.

b. Silver and copper-clad alloys.

c. Copper, aluminum, or copper-clad aluminum.

d. Only aluminum.

Accessibility for maintenance is critical.

9 / 20

How does Article 110.26 define the required working space around
electrical equipment?

a. At least 1 foot on all sides of the equipment.

b. Only the width of the equipment.

c. Enough space to safely operate and maintain the equipment.

d. Space requirements depend solely on the equipment voltage.

Connections depend on the lowest-rated component.

10 / 20

What are the temperature limitations for conductor connections in
Article 110.14?

a. Conductors are rated only for high-temperature environments.

b. Ratings are not relevant to terminations.

c. Conductor temperatures must not exceed the lowest-rated component.

d. Conductors must always operate below 60°C.

Approval is determined by an overseeing authority

11 / 20

What does "Approved" equipment mean in the context of NEC Article
110?

a. Acceptable to the authority having jurisdiction (AHJ).

b. Certified by any testing laboratory.

c. Verified through inspection alone.

d. Manufactured by a licensed supplier.

The fault current is a critical factor.

12 / 20

How does Article 110.9 address interrupting ratings?

a. Equipment must withstand all electrical faults.

b. Ratings apply only to low-voltage circuits.

c. Ratings are determined after installation.

d. Interrupting ratings must equal or exceed available fault current.

It compares demand to load capacity.

13 / 20

What is a "Demand Factor"?

a. The percentage of time a load is in operation.

b. The ratio of maximum demand to total connected load.

c. The ratio of current to voltage in a circuit.

d. The ratio of total connected load to maximum demand.

Grounding ensures electrical stability and safety

14 / 20

What does "Grounded" mean?

a. Connected to the neutral conductor.

b. Connected to a protective device.

c. Electrically connected to earth or some conductive body serving as earth.

d. Connected to earth or a conductive body serving as earth.

Focus on energized servicing requirements.

15 / 20

How does Article 110.16 address arc-flash warnings?

a. Equipment likely to require energized maintenance must have arc-flash warnings.

b. Warning labels are required for all household appliances.

c. Labels are optional if maintenance is infrequent.

d. Equipment must have generic warning signs.

Lockability must persist, even without the lock present.

16 / 20

What does Article 110.25 require for lockable disconnecting means?

a. They must have integrated padlocks.

b. They must be used only during servicing.

c. Locks are required only in outdoor installations.

d. They must remain lockable with or without the lock installed.

Safety and protection are key purposes.

17 / 20

What is an "Enclosure"?

a. A structure enclosing utility systems.

b. The case or housing surrounding equipment to prevent accidental contact with energized parts.

c. A protective layer over conductors.

d. A covering for outdoor electrical installations.

Fault current impacts interrupting capability.

18 / 20

What is the purpose of field marking available fault current under
Article 110.24?

a. To document overcurrent device settings.

b. To ensure equipment ratings are sufficient for fault conditions.

c. To estimate circuit impedance.

d. To warn of high voltage levels.

Protection must match the equipment's enclosure.

19 / 20

What is required for unused openings in equipment per Article
110.12(A)?

a. Only metallic plugs are acceptable.

b. They must be closed to provide equivalent protection.

c. They must be permanently sealed.

d. They can remain open if indoors.

Secure installation ensures stability and safety.

20 / 20

How does Article 110.13 address equipment mounting?

a. Equipment can be mounted on any surface.

b. Equipment must be firmly secured.

c. Wood plugs are allowed for anchoring in concrete.

d. Temporary mounting is permissible during installation.

Your score is

Exit

Rate & Review

Thank you for taking the time to leave us a review! Your feedback is greatly appreciated and helps us improve our services.

Pos.	Name	Score	Duration
1	jalva292	100 %	12 minutes 12 seconds
2	jalva292	85 %	20 minutes 1 seconds
3	Guest	75 %	3 minutes 35 seconds
4	jalva292	60 %	11 minutes 28 seconds
5	eep	40 %	7 minutes 42 seconds

Electrician

Article 100-110 Quiz02

Article 100-110 Quiz03

Leave a Reply Cancel reply

Electrician

Electrician

Report a question

Article 100-110 Quiz01

Article 100-110 Quiz02

Article 100-110 Quiz03

Leave a Reply Cancel reply