NCEES Electrical Engineering 2

Question 1

According to the NCEES PE Electrical exam, the National Electrical Code (NEC) is primarily concerned with:

Accepted Answer

Safe installation of electrical wiring and equipment

Answer

The NEC (NFPA 70) establishes minimum safety standards for the installation of electrical wiring and equipment.

Question 2

In NCEES PE Electrical practice, the resonant frequency of a series RLC circuit is:

Accepted Answer

f₀ = 1/(2π√LC)

Answer

Resonant frequency f₀ = 1/(2π√LC): at resonance, inductive and capacitive reactances cancel.

Question 3

For the NCEES PE Electrical exam, the power factor of an AC circuit is defined as:

Accepted Answer

Ratio of real power to apparent power (cos θ)

Answer

Power factor = P/S = cos θ, where P is real power (W) and S is apparent power (VA).

Question 4

In NCEES PE Electrical design, a per-unit system is used in power systems to:

Accepted Answer

Normalize system quantities to base values, simplifying calculations across voltage levels

Answer

The per-unit system normalizes voltages, currents, and impedances to base values, eliminating transformer turns ratios from calculations.

Question 5

On the NCEES PE Electrical exam, a symmetrical three-phase fault analysis uses which method to find fault currents?

Accepted Answer

Thevenin equivalent circuit at the fault point

Answer

Symmetrical three-phase faults are analyzed using the Thevenin equivalent impedance at the fault bus to compute fault current.

NCEES National Council of Examiners for Engineering and Surveying Practice Practice Test