Question 1
A technician measures a 240-volt branch circuit supplying a 30-ampere load. Using Ohm's law, which value represents the approximate resistance of the load?
Show answer & explanation
Correct answer: A - 8 ohms
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These 10 free MD-JE questions are organized by exam domain, so you can see how each part of the Maryland Journeyman Electrician License Exam (MD-JE) blueprint is tested. Reveal the answer and explanation under each question.
A technician measures a 240-volt branch circuit supplying a 30-ampere load. Using Ohm's law, which value represents the approximate resistance of the load?
Correct answer: A - 8 ohms
A motor circuit repeatedly trips its overcurrent protective device during startup but operates normally after reaching speed. Which troubleshooting approach is most appropriate first?
Correct answer: A - Evaluate motor starting current and circuit requirements
A journeyperson uses a digital multimeter to investigate an inoperative circuit. Before measuring resistance, what should be verified?
Correct answer: A - The circuit is de-energized
A technician reads an electrical drawing showing a symbol for a disconnecting means. What skill area is being applied when identifying that symbol?
Correct answer: A - Electrical diagrams and symbols interpretation
During an inspection, an electrician finds that equipment grounding conductors are missing from several branch circuits. Which NEC concept is most directly involved in correcting this condition?
Correct answer: A - Providing a low-impedance path for fault current
A commercial installation uses conductors in a raceway where heat from adjacent current-carrying conductors may affect ampacity. Which factor should the electrician evaluate before selecting conductor size?
Correct answer: A - Conductor ampacity adjustment requirements
A contractor installs a dwelling unit circuit supplying multiple receptacles and lighting outlets. Which NEC principle is most important when determining the required branch-circuit protection?
Correct answer: A - Matching conductor protection to the circuit requirements
A facility stores flammable vapors that may create an ignitable atmosphere under normal operating conditions. Which NEC topic should guide the electrical installation requirements?
Correct answer: A - Hazardous locations and classified areas
A pool installation is being reviewed for electrical safety. Which issue requires special attention because of the increased risk associated with water environments?
Correct answer: A - Grounding, bonding, and protection requirements
A building requires emergency power systems that continue operating when normal power fails. Which NEC category addresses these installations?
Correct answer: A - Emergency and standby systems
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