Electrical Engineering Flashcards
6 cards from real NCEES practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 6 Electrical Engineering flashcards as text
According to the NCEES PE Electrical exam, the National Electrical Code (NEC) is primarily concerned with:
Answer: Safe installation of electrical wiring and equipment
The NEC (NFPA 70) establishes minimum safety standards for the installation of electrical wiring and equipment.
In NCEES PE Electrical practice, the resonant frequency of a series RLC circuit is:
Answer: f₀ = 1/(2π√LC)
Resonant frequency f₀ = 1/(2π√LC): at resonance, inductive and capacitive reactances cancel.
For the NCEES PE Electrical exam, the power factor of an AC circuit is defined as:
Answer: Ratio of real power to apparent power (cos θ)
Power factor = P/S = cos θ, where P is real power (W) and S is apparent power (VA).
In NCEES PE Electrical design, a per-unit system is used in power systems to:
Answer: Normalize system quantities to base values, simplifying calculations across voltage levels
The per-unit system normalizes voltages, currents, and impedances to base values, eliminating transformer turns ratios from calculations.
On the NCEES PE Electrical exam, a symmetrical three-phase fault analysis uses which method to find fault currents?
Answer: Thevenin equivalent circuit at the fault point
Symmetrical three-phase faults are analyzed using the Thevenin equivalent impedance at the fault bus to compute fault current.
In NCEES PE Electrical engineering, the speed of a synchronous generator in rpm is related to the number of poles P and frequency f by:
Answer: N = 120f/P
Synchronous speed N = 120f/P rpm, where f is frequency in Hz and P is number of poles.
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