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These 10 free NM-EE98J questions are organized by exam domain, so you can see how each part of the New Mexico EE-98J Journeyman Residential and Commercial Electrical Certificate Exam blueprint is tested. Reveal the answer and explanation under each question.
For a 480Y/277 V panelboard, exposed live parts are on one side of the working space and a grounded concrete wall is opposite. Which minimum depth meets the requirement?
Correct answer: C - 3.5 ft; this is Condition 2 at 277 V to ground
With a 120 V control circuit commanded on, the load remains de-energized. A voltmeter reads the full 120 V across a normally closed limit switch that should be conducting. The full voltage drop localizes the problem to:
Correct answer: A - An open or high-resistance limit-switch path
Power-factor correction raises a steady 10 kW inductive load from 0.80 lagging to 0.95 lagging. The mechanical load and supply voltage stay unchanged. What changes at the source?
Correct answer: D - Line current and kVA fall; real power stays near 10 kW
On a loaded 120 V circuit, a properly zeroed clamp meter reads 12.4 A around the ungrounded conductor and 0.6 A around the ungrounded and grounded conductors together. How should the 0.6 A value be interpreted?
Correct answer: B - Residual current leaving the intended conductors
Consider a 2,000 ft² dwelling with general lighting and receptacles, the two required 1,500 VA small-appliance loads, one 1,500 VA laundry load, a 4,500 W, 80-gallon fixed storage water heater, and one household dryer nameplated 4,600 W. Use 3 VA/ft²; apply 100% to the first 3,000 VA of general load and 35% to the remainder; treat the water heater at 125%; and use 5,000 W or the dryer nameplate, whichever is larger. At 240 V, what calculated load current results?
Correct answer: B - 67.7 A
Measurements at a 120/240 V single-phase dwelling panel are 240 V line-to-line, 62 V from one leg to neutral, and 178 V from the other leg to neutral. The two line-to-neutral readings shift as appliances cycle. Which defect is indicated?
Correct answer: D - An open or high-resistance service neutral
Available fault current at an HVAC control panel is 10 kA. The upstream circuit breaker has a 22 kA interrupting rating, but the control panel is marked 5 kA short-circuit current rating (SCCR). No current-limiting protection or listed combination raises that rating. What condition prevents acceptance?
Correct answer: A - The panel SCCR is too low for the 10 kA fault current
Whenever 120 V loads operate, objectionable current appears on a subpanel raceway and bonded metal water piping. It disappears when the subpanel main is opened, and insulation tests are satisfactory. The most likely installation error is:
Correct answer: C - A downstream neutral-to-enclosure bond is carrying normal return current
After a listed GFCI receptacle is installed as a permitted replacement on an existing two-wire branch circuit with no equipment grounding conductor, what remains true?
Correct answer: B - It provides personnel protection but does not create an equipment ground
Six current-carrying 3 AWG copper THHN conductors share a raceway in 30°C ambient. The 90°C table ampacity is 115 A, the 75°C ampacity is 100 A, the equipment terminations are rated 75°C, and the adjustment factor for 4-6 conductors is 80%. After adjustment and the terminal limitation, which ampacity governs?
Correct answer: D - 92 A
The NM-EE98J exam also covers these domains. Drill them in the full free practice test:
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