Expert-Level Electrical Engineering Challenge
A rigorous set of questions designed for seasoned engineers to evaluate deep understanding of complex electrical designs.
Quiz Questions
Answer all questions below and test your knowledge.
- 1
Which capacitor rating most effectively improves a 150 kW, 0.75 lagging power factor load to reach 0.95 lagging at 400 V line-to-line three-phase?
- 2
A 69 kV/13.8 kV, 60 MVA transformer must supply a delta‑connected load. Which primary winding connection guarantees phase voltage compatibility?
- 3
For a 60 Hz system, a tuned passive filter is designed to attenuate the 5th harmonic. What is the filter’s resonant frequency?
- 4
Increasing the switching frequency of a PWM inverter primarily reduces which adverse effect?
- 5
A 220 kV transmission line has a surge impedance of 300 Ω. What is its surge impedance loading in MVA?
- 6
In a two-level VSC, the maximum line voltage is Vdc·√3/2·m. With Vdc = 800 kV and m = 0.9, what is the peak line-to-line voltage?
- 7
When tuning a PID controller for a high‑inertia brushless DC motor, which parameter should be increased first to improve steady‑state accuracy without inducing overshoot?
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