Electrical interview questions and answers

Here i will give the Best Electrical interview questions and answers that asked in last time

electrical interview questions and answers

What is the working principle of single phase induction motor?

single-phase-induction-electrical interview questions and answers

Ans:

According to double revolving field theory there is forward and backward field will produce in single phase induction motor .These field are creating equal and opposite torque .So resultant torque is zero.That is why single phase induction motor is not self starting . In order to start the single phase induction motor we have auxiliary winding.The principle used in auxiliary winding the phase difference between main and auxiliary winding creating a torque . In order to improve the angle we are using capacitor .

What is the working principle of shaded pole motor?

electrical interview questions and answersShadedPoleMotor
Ans:

Shaded pole is an another type single phase induction motor . it has salient pole structure,in which all poles are shaded . in which the auxiliary winding is composed of a copper ring or bar surrounding a portion of each pole. This will produce the flux difference between shaded and un shaded ,its will create the torque .Shaded pole motor are used below 0.05 HP (~ 40 W) because of its extremely simple construction.

Reference

Difference between MCCB and MCB ?

Ans:

MCCB is a Module case circuit breaker which has a rugged construction as it can break larger currents usually from (100-1000A).

MCB is a miniature circuit breaker which is used to break small currents. Like in domestic LT circuits. The ratings usually end up to 100 A

What are the steps taken for 11 Kv Fault?

Take the permit and open AB

100V 1A source and 1V 100A source which one is safe ?

1V 100A is safe

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Tony

Hi, Myself Tony George. An Electrical Engineer by Education, a Software Developer by Profession and an Education Blogger by Passion. In the past, I had been working as an Engineer in KSEB. The knowledge that I have acquired I would like to share here with you. I will be happy if these articles can give you a way to your career growth. Feel free to contact me.

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