Practice questions mapped to all 9 knowledge areas on the NCEES PE Electrical and Computer (Power) exam. Figure-based questions with worked explanations, full solution steps, and NEC/IEEE references.
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A 3-phase, 480V system supplies a 200 HP induction motor with an efficiency of 93% and a power factor of 0.87 lagging. The full-load line current drawn by the motor is most nearly:
A single-phase transformer is rated 50 kVA, 2400/240 V. The transformer has a per-unit impedance of 0.04. If a bolted fault occurs on the secondary terminals, the fault current on the secondary side is most nearly:
Per NEC 430.52, the maximum rating of a dual-element time-delay fuse for branch-circuit short-circuit and ground-fault protection of a continuous-duty AC motor is most nearly:
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