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.
These 10 free ND-ME questions are organized by exam domain, so you can see how each part of the North Dakota Master Electrician License Exam blueprint is tested. Reveal the answer and explanation under each question.
Lamps in a shop brighten sharply when a 120 V load on the opposite leg switches on. Recorded readings at the shop's 120/240 V feeder panel are 171 V and 69 V from the two lines to neutral, with 240 V line-to-line. At the feeder's supply end, both line-to-neutral readings remain 120 V. The feeder has now been isolated. Which fault best accounts for this pattern?
Correct answer: C - An open or high-resistance connection in the feeder neutral
Two clamp meters measure the same steady load on a circuit supplying electronic lighting drivers. An average-responding, sine-calibrated meter reads 14.2 A; a true-RMS meter reads 17.6 A. Both have passed calibration, and the true-RMS meter is operating within its bandwidth and crest-factor ratings. Each clamp encloses one ungrounded conductor. How should the master interpret the disagreement?
Correct answer: B - Use the true-RMS reading to assess conductor heating from the distorted current.
A manufacturing company leases a warehouse for its own operations and plans to install new lighting there. Its employee holds an active North Dakota Master license, serves as the company's Master of Record, and is covered by the company's liability insurance. The facilities director believes leased property requires a separate electrical contractor. Which staffing decision is consistent with the Master of Record's authority?
Correct answer: C - Use the company's Master of Record; the warehouse is leased by that organization.
Four dwelling refrigeration installations are being reviewed under North Dakota's GFCI exception. Every receptacle has an individual 20 A branch circuit and a 'Refrigeration Equipment Only' label. All locations are dry. Which installation qualifies for the exception?
Correct answer: A - A refrigerator and single 20 A receptacle in a kitchen, both 9 ft from the nearest sink
During acceptance testing of a new two-family dwelling, every required smoke alarm sounds when another alarm in the same unit is activated. Each unit has the required building power and battery backup, but occupants in the other unit receive no notification. Under North Dakota's two-family-dwelling rule, what is missing?
Correct answer: D - A notification device in each unit connected to the other unit's smoke-alarm system
Floodwater has partly submerged a distribution panel supplied through an automatic transfer switch. The utility service disconnect has been opened, but the standby generator remains in automatic mode and can still supply the panel. Source disconnects can be reached from dry, safe locations. Which isolation plan addresses the remaining hazard before work on the panel?
Correct answer: B - Isolate and secure both the utility and generator supplies against energization, then verify absence of voltage at the work location.
Five current-carrying conductors share a 60 ft raceway in a 30°C ambient. The conductors being evaluated are No. 8 copper THWN-2, and every termination is rated 75°C. Table 310.16 lists 50 A in the 75°C column and 55 A in the 90°C column for this size. After adjustment for conductor count, what allowable ampacity applies before selecting overcurrent protection?
Correct answer: C - 44 A
The replacement motor on a conveyor is a continuous-duty, 10 hp, 230 V, three-phase squirrel-cage motor. Its nameplate shows 24 A, service factor 1.00, and temperature rise 50°C; the NEC table full-load current is 28 A. No increased-overload allowance for starting difficulty is being used. What is the maximum initial trip-current setting for its separate overload protection?
Correct answer: B - 27.6 A
A metal device box will receive two 12/2-with-ground cables and one 12/3-with-ground cable. All seven insulated conductors are spliced or terminated in the box. It also contains internal cable clamps and one receptacle yoke connected with No. 12 pigtails. The three entering grounding conductors are No. 12; all pigtails remain entirely inside the box, and there are no other fittings requiring a volume allowance. The No. 12 conductor volume allowance is 2.25 cubic inches. Which listed box volume is the smallest suitable choice?
Correct answer: D - 26.0 cubic inches
An outdoor air-conditioning condensing unit is marked 'Minimum Circuit Ampacity 28 A' and 'Maximum Circuit Breaker 45 A.' The installed copper conductors have a final allowable ampacity of 30 A after all applicable limitations. A listed 40 A breaker of the permitted type starts and operates the unit reliably. A reviewer objects that the breaker exceeds the conductor ampacity. How should that objection be resolved?
Correct answer: A - Retain the conductors and breaker; both satisfy the unit's marked limits.
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