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Quizzes > High School Quizzes > Career

Sample Journeyman Electrician Practice Quiz

Prepare effectively with realistic journeyman test questions.

Difficulty: Moderate
Grade: Other
Study OutcomesCheat Sheet
Colorful paper art promoting a technology-themed quiz for 9th graders by Wired for Success.

Easy
What is the basic unit of electrical current?
Volt
Ampere
Ohm
Watt
Ampere is the SI unit for measuring electrical current, indicating the rate of electron flow. Volt, ohm, and watt represent voltage, resistance, and power respectively.
Which color is typically used for the ground wire in residential electrical systems?
Green
Black
Red
White
In residential wiring, the ground wire is typically green or bare copper, clearly identifying its safety role. The other colors are used for live or neutral conductors.
What is the primary function of a circuit breaker in an electrical system?
To increase the circuit voltage
To enhance energy efficiency
To regulate the frequency of the supply
To protect the circuit by stopping the current flow during an overload
A circuit breaker is designed to interrupt the electrical flow when an overload or short circuit is detected, protecting the system from damage. The other options do not describe the protective function of a circuit breaker.
Which device is best used to measure electrical voltage?
Multimeter
Pliers
Screwdriver
Hammer
A multimeter is an essential tool that can measure voltage, current, and resistance, making it indispensable for electrical testing. The other tools are not intended for measuring electrical properties.
What does AC stand for in electrical terms?
Auto Converter
Alternating Current
Ampere's Circuit
Accumulated Charge
AC stands for Alternating Current, which periodically reverses its direction. The other options do not correctly represent the term AC.
Medium
According to Ohm's Law, if the voltage increases while resistance remains constant, what happens to the current?
The current decreases
The resistance increases
The current increases
The power decreases
Ohm's Law (V = I x R) shows that if voltage increases while resistance is held constant, the current must increase proportionally. The other options do not correctly follow from Ohm's Law.
In a series circuit, what is true about the current through each component?
It varies based on component resistance
It is higher at the start
It is lower at the end
It is the same through all components
In a series circuit, the same current flows through every component because there is only one path for the electrons. Voltage divides among the components, but current remains constant.
What is the primary purpose of a ground fault circuit interrupter (GFCI)?
To regulate voltage
To prevent electric shocks
To increase current flow
To act as a surge protector
A GFCI quickly cuts off power when it detects an imbalance in current, thereby reducing the risk of electric shock. The other options do not accurately describe the function of a GFCI.
What is the main function of a transformer?
To change the voltage level
To amplify current
To rectify current
To store energy
Transformers serve to increase or decrease AC voltage levels in power systems, ensuring the appropriate voltage for different applications. The other functions listed do not describe the role of a transformer.
Which electrical formula correctly represents power?
Power = Voltage x Current
Power = Current x Resistance
Power = Voltage / Current
Power = Voltage + Current
The correct formula for electrical power is the product of voltage and current (P = V x I). The other formulas do not correctly calculate power.
What does the term 'short circuit' refer to?
A switch turning off the circuit
An unintended low-resistance connection allowing excessive current
A high-resistance connection
A properly functioning circuit
A short circuit is an accidental connection that bypasses part of the circuit, resulting in an abnormally high current flow. This condition can cause overheating, damage, or fire hazards.
Which safety protocol is most essential when working with electrical circuits?
Wearing casual clothes
Ignoring warning labels
Disconnecting power before maintenance
Using metal tools in wet conditions
Disconnecting power before beginning any electrical work is crucial to prevent shocks and accidental injuries. The other options do not conform to established safety practices.
What does the term 'circuit continuity' refer to?
A voltage drop
A power surge
An electrical short
An unbroken electrical path in a circuit
Circuit continuity means there is an unbroken path that allows electrical current to flow. Without continuity, the circuit is open and current cannot pass through.
In a three-phase electrical system, what is a common benefit compared to a single-phase system?
Reduced maintenance requirements
Simplified wiring
More efficient power delivery
Lower installation cost
Three-phase systems deliver power more efficiently and with a steadier flow, which is highly advantageous in industrial and high-load applications. The alternatives do not primarily describe the benefits of a three-phase system.
What is a typical use of a capacitor in an electrical circuit?
To store and release electrical energy
To amplify signals
To provide a constant voltage
To convert AC to DC
Capacitors are used to store electrical energy temporarily and then release it when needed, which helps in smoothing voltage fluctuations. The other functions are typically handled by different components in a circuit.
Hard
If a circuit has a 120V supply and a resistance of 30 ohms, what is the current according to Ohm's Law?
0.25 A
3 A
30 A
4 A
Using Ohm's Law (I = V/R), the current is calculated as 120 V divided by 30 ohms, which equals 4 A. The other options result from incorrect arithmetic or misinterpretation of the formula.
An electrician uses a clamp meter that provides a reading of 15 A in a conduit. If the reading is 15% lower than the actual current due to instrument error, what is the actual current?
Approximately 17.6 A
Approximately 15.0 A
Approximately 18.5 A
Approximately 12.8 A
If the reading is 15% lower than the actual value, then 0.85 times the true current equals 15 A. Dividing 15 by 0.85 gives approximately 17.65 A, which rounds to 17.6 A. The other answers do not satisfy this calculation.
In multi-wire branch circuits, why is it important to correctly balance the load across the shared neutral?
To increase circuit impedance
To eliminate the need for a ground
To prevent overheating of the neutral conductor
To reduce the circuit's voltage rating
Balancing the load ensures that the neutral carries only the difference in current between phases, preventing potential overheating. The other options misstate the purpose and design of multi-wire branch circuits.
Which factor does not typically affect conductor ampacity?
Ambient temperature
Conductor color
Insulation type
Installation conditions
Ampacity is influenced by factors such as ambient temperature, insulation, and installation environment, which affect heat dissipation. The color of the conductor is solely for identification and has no effect on ampacity.
While interpreting a complex wiring diagram, an electrician notes a symbol that denotes a contactor. Which of the following best describes a contactor?
A device that stores electrical charge
A tool for measuring resistance
An electrically controlled switch used for switching high-power circuits
An instrument for detecting grounding issues
A contactor is an electrically operated switch designed to control high-power circuits, such as those used for motors or lighting systems. The other options do not correctly represent the function of a contactor.
0
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Study Outcomes

  1. Understand key technology concepts related to learning and practice.
  2. Analyze personal strengths and weaknesses in technology-themed content.
  3. Apply effective study strategies to enhance test readiness.
  4. Evaluate quiz performance to identify areas for improvement.
  5. Develop confidence in handling technology-related exam questions.

Sample Journeyman Electrician Test Cheat Sheet

  1. Master Ohm's Law - Ohm's Law (V = IR) is the backbone of all circuit analysis, letting you calculate voltage, current, or resistance when the other two are known. Becoming fluent with this formula helps you predict component behavior under load and troubleshoot issues fast. Practice rearranging the equation in different ways until it's second nature. Electrician 101 Practice Tests
    2. electrician101.com
  2. Understand the NEC - The National Electrical Code (NEC) sets the standard for safe electrical design and installation across the U.S. Get comfortable navigating its chapters, tables, and articles so you can find requirements quickly on the job. Learning the structure and cross‑references now will save you time and ensure compliance later. Mometrix NEC Review
    3. mometrix.com
  3. Practice Load Calculations - Accurate load calculations determine the right wire sizes and breaker ratings for each circuit, preventing overloads and hazards. Dive into demand factors, continuous loads, and voltage drop considerations to size everything correctly. Hands‑on practice with real‑world scenarios will build your confidence. Electrician 101 Load Exercises
    4. electrician101.com
  4. Study Grounding & Bonding - Proper grounding prevents shocks and stabilizes your electrical system, while bonding ensures all metal parts are electrically connected. Learn the difference between grounding electrodes, equipment grounding conductors, and bonding jumpers. Mastering these basics protects both people and equipment. Electrician 101 Grounding Guide
    5. electrician101.com
  5. Review Wiring Methods - From conduit and raceways to NM and MC cable, each wiring method has its own rules and best practices. Familiarize yourself with installation techniques for residential, commercial, and industrial settings. Knowing the right materials and code requirements keeps projects efficient and safe. Electrician 101 Wiring Tips
    6. electrician101.com
  6. Learn Overcurrent Protection - Overcurrent devices like fuses and circuit breakers guard circuits against dangerous currents. Study how to select, size, and install them, and understand coordination to avoid unnecessary outages. Practical examples of coordination curves will cement your understanding. Electrician 101 Protection Quiz
    7. electrician101.com
  7. Interpret Electrical Schematics - Blueprints, schematics, and line diagrams are your roadmap on any electrical job. Learn common symbols, wiring conventions, and how to trace circuits for installation or troubleshooting. The sooner you can "read" a drawing, the faster you'll work. Electrician 101 Schematic Training
    8. electrician101.com
  8. Understand Motor Controls - Motors power a huge range of machines, and knowing how to wire starters, relays, and variable frequency drives is key. Dive into control circuits, overload protection, and interlock logic to keep motors running smoothly. Real‑world wiring diagrams will sharpen your skills. Electrician 101 Motor Labs
    9. electrician101.com
  9. Review Safety Protocols - PPE, lockout/tagout, and NFPA 70E guidelines aren't optional; they're lifesavers. Practice proper safety setups for each task, from voltage checks to live‑line work. A safe electrician is a lasting electrician - make safety your top habit. Electrician 101 Safety Course
    10. electrician101.com
  10. Practice with Sample Questions - Regularly testing your knowledge with mock exams highlights weak spots and builds test‑taking stamina. Timed drills help you manage exam pressure and improve speed. Set a study schedule, track your progress, and celebrate each milestone. Mometrix Practice Tests
    11. mometrix.com
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