# 202

Power Systems Engineer interview questions shared by candidates

## Top Interview Questions

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Power Systems Engineer was asked...27 November 2020

### Your experience on hybrid system

I present my practical and theorical knowledge on the subject

### They asked me to limit my salary range between 50-55 which is inerasably low

I did not go below 60-70k and they reject me

10X lower.

### Why hyperloop

Who wouldn't like to be part of building a technology that is completely out of the box and futuristic. Less

### I was given a map, illustrating a part of electricity network at the border of England and Scotland. The Scenario was loosing a 400 kV line and its subsequent effects on other 132 kV line and the connected network.The question was what should be done to decrease the effect of this outage? What lines or demands should be (probably) shut down? Explain the protection measures in such case.

I explained loosing one out of two big links will have an adverse effect

### Structured Interview

Structured Interview

### One of the questionnaires was a series of approximately 30 puzzles and logic questions.

The difficulty was not terrible as I feel I was able to get most if not all answers correct. Less

### For a buck converter, what is a typical phase margin to optimize response time and stability?

I said 60 degrees, the official answer is 45 degrees.

### Suppose you have a transconductance amplifer with infinite input impedance and transconductance Gm. There is a feedback resistor from output back to input (Rf). There is a load resistor from the output to Ground (RL) . Find the input impedance as a function of Gm, Rf, Rg.

start out with special cases. if Gm* RL = 1, then Vout = Vin and Zin = infinite. If Gm = 0, then Rin = RL+ Rout To get general solution, use KCL and KVL Less