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Most states require electricians to be certified.
You may choose to take the exam for your state or a national certification exam.
Some states have reciprocity, which means your license is valid in multiple states.
To become certified, you’ll need to pass a certification exam.
Before sitting for your exam, it’s a great idea to take a practice test.
Our practice test features questions about regulations, laws, and administrative functions, basic electrical circuits, transformers, interior electrical systems, interior electrical systems, and DC and DC rotating equipment.
Electrician Certification Practice Test
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Your answers are highlighted below.
Question 1 |
What is the standard voltage for residential electrical outlets in the United States?
110V | |
220V | |
240V | |
120V |
Question 2 |
Which of the following is a type of electrical conductor?
PVC | |
Copper | |
Rubber | |
Aluminum |
Question 3 |
What does NEC stand for in the context of electrical work?
National Energy Code | |
National Electrical Code | |
New Electrical Circuits | |
North Electric Company |
Question 4 |
A GFCI (Ground Fault Circuit Interrupter) is designed to protect against:
Overvoltage | |
Short circuits | |
Ground faults | |
Electrical surges |
Question 5 |
What is the purpose of a junction box in an electrical installation?
To hide wires | |
To distribute power | |
To provide a connection point for wires | |
To store tools |
Question 6 |
Which wire color is typically used for a ground wire?
Black | |
Green or bare copper | |
Red | |
White |
Question 7 |
What is the recommended minimum height for electrical outlets above the floor in a residential setting?
12 inches | |
14 inches | |
16 inches | |
18 inches |
Question 8 |
What is the purpose of a circuit breaker?
To create a circuit | |
To interrupt the flow of current in case of overload or short circuit | |
To regulate voltage | |
To generate electrical power |
Question 9 |
Which type of electrical panel provides protection against overcurrent and short circuits?
Main lug panel | |
Subpanel | |
Circuit breaker panel | |
Fuse box |
Question 10 |
What is the standard voltage for three-phase power in commercial and industrial settings?
120V | |
208V | |
240V | |
480V |
Question 11 |
What is the purpose of an Ohmmeter?
Measure voltage | |
Measure resistance | |
Measure current | |
Measure frequency |
Question 12 |
In a series circuit, if one resistor fails (opens), what happens to the current in the circuit?
Increases | |
Decreases | |
Stays the same | |
Becomes erratic |
Question 13 |
Which of the following is a type of electrical insulator?
Copper | |
Rubber | |
Aluminum | |
Silver |
Question 14 |
What does the term "Ampere" measure?
Voltage | |
Current | |
Resistance | |
Power |
Question 15 |
What is the purpose of a transformer in an electrical system?
Generate electricity | |
Store electrical energy | |
Change voltage levels | |
Control circuit flow |
Question 16 |
Which type of wiring method is commonly used in residential construction and is easy to install?
Conduit wiring | |
Romex (non-metallic sheathed cable) | |
Armored cable (AC) | |
BX cable |
Question 17 |
What is the maximum number of conductors allowed in a conduit for a 3/4-inch trade size conduit according to NEC?
6 | |
9 | |
12 | |
18 |
Question 18 |
What is the purpose of a capacitor in an electrical circuit?
Store electrical energy | |
Regulate voltage | |
Increase current flow | |
Store magnetic energy |
Question 19 |
Which type of electrical wire is typically used for long-distance power transmission?
Solid core wire | |
Stranded wire | |
Coaxial cable | |
High-tension wire |
Question 20 |
What is the minimum bending radius for a typical non-metallic sheathed cable (Romex) according to NEC?
4 times the cable diameter | |
6 times the cable diameter | |
8 times the cable diameter | |
10 times the cable diameter |
Question 21 |
Which of the following is a symptom of a short circuit?
Dimming lights | |
Excessive heat | |
Flickering lights | |
Overvoltage |
Question 22 |
In a DC (direct current) circuit, which way does current flow?
From positive to negative | |
From negative to positive | |
Both directions | |
It depends on the circuit |
Question 23 |
What is the primary function of a ground rod in an electrical system?
Provide a path for current flow | |
Prevent overvoltage | |
Provide a grounding connection to earth | |
Increase circuit resistance |
Question 24 |
What is the purpose of a lockout/tagout procedure in electrical work?
Prevent unauthorized access to electrical panels | |
Secure tools and equipment | |
Ensure the safe de-energizing of equipment during maintenance | |
Label electrical outlets |
Question 25 |
Which of the following is an example of a hazardous location according to NEC?
Bedroom | |
Kitchen | |
Bathroom | |
Gasoline storage area |
Question 26 |
What is the standard color coding for a hot wire in a typical electrical installation?
Black or red | |
White or gray | |
Green or bare copper | |
Blue or yellow |
Question 27 |
What is the purpose of an AFCI (Arc-Fault Circuit Interrupter)?
Protect against ground faults | |
Protect against overcurrent | |
Protect against arc faults | |
Protect against short circuits |
Question 28 |
Which tool is commonly used to measure voltage in an electrical circuit?
Multimeter | |
Ohmmeter | |
Ammeter | |
Oscilloscope |
Question 29 |
What is the purpose of a conduit fill calculation in electrical installations?
Determine the size of conduit required for a specific application | |
Calculate the number of conductors that can be installed in a conduit | |
Measure the resistance of the conduit material | |
Determine the voltage drop in the conduit |
Question 30 |
What is the primary purpose of bonding in an electrical system?
Provide a path for current flow | |
Prevent overvoltage | |
Ensure continuity of metal parts | |
Increase circuit resistance |
Once you are finished, click the button below. Any items you have not completed will be marked incorrect.
There are 30 questions to complete.
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