Question

What is the empirical value of window space factor, given the output is 1000kV?

(a) 0.09

(b) 0.9

(c) 0.009

(d) 0.0009

This question was posed to me during an interview for a job.

I'd like to ask this question from Window Space Factor topic in section Design of Transformers of Design of Electrical Machines

Answer 1

The correct answer is (c) 0.009

The explanation is: Empirical value of window space factor = 10 / (30+kV)

kV = 1000 kV, empirical value = 10/1030 = 0.009.