10 exam-style questions with answers and explanations, straight from our 1,030-question bank. Tap an answer to check yourself. When you're ready, take the scored version in the free practice test.
The CO-JE exam has 90 questions and runs 4 hours.
These 10 free CO-JE questions are organized by exam domain, so you can see how each part of the Colorado Journeyman Electrician License Exam blueprint is tested. Reveal the answer and explanation under each question.
A feeder supplies several branch circuits from a distribution panel. Which statement best describes the feeder function?
Correct answer: A - It carries power from service equipment or another source to distribution points
A service disconnect enclosure is installed for a commercial service. What is the primary purpose of bonding the enclosure to the electrical system?
Correct answer: A - Provide a low-impedance fault-current path to help clear a fault
A breaker is selected for conductors with lower allowable ampacity than required by the load. What is the primary concern?
Correct answer: A - The overcurrent device may not adequately protect the conductors
Which information is needed when determining conductor ampacity in an installation requiring correction factors?
Correct answer: A - Insulation rating and applicable adjustment factors
A box contains more conductors than expected. Which requirement determines whether the installation is acceptable?
Correct answer: A - Box fill requirements
A disconnect is installed near equipment for maintenance. Which principle does this address?
Correct answer: A - Safe isolation from the power source
Which device provides additional protection by detecting leakage current?
Correct answer: A - Ground-fault circuit-interrupter
A motor repeatedly trips its overload protection while operating normally. What should be investigated first?
Correct answer: A - An overload condition affecting motor operation
A transformer has higher primary voltage than secondary voltage. What type is it?
Correct answer: A - Step-down transformer
A 120-volt load draws 15 amperes. What is the approximate power consumption using P = V × I?
Correct answer: A - 1,800 watts
The CO-JE exam also covers these domains. Drill them in the full free practice test:
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