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Electrical Engineering Interview Questions

What is the value of 3 phase voltage?

5840

why do we need a 4th wire in 3phase 3wire transmission line

5851

What are the limiting factor for controlling maximum hot point temperature within a hydrogen and water cooled generator?

2512

resistance of transformer oil=?

HCL,

2765

What shall be minimum thickness of firewall in between two transformers and which code specifies it ?

16105

Three phase star connected PT transformer primary side one phase fuse is blown what will be the output in secondary side(Secondary side also three phase star connected)

2164

Three phase star connected PT transformer primary side one phase fuse is blown what will be the output in secondary side(Secondary side also three phase star connected)

5582

what is the internal working of star delta starter

1244

in a plug point why the hole size at the top is large?

Bhel, TCS,

8751

what is 'A' Check & 'B' Check ?

2678

What is single break or Double break related to MCB?

3692

How to convert KW to KVA or KVAR OR kvar/kva to kw?

75021

open circuit test when performed on double the voltage & double the freq, then what will happen with p.f and current magnitude?

1392

what is an S.C.R. and how do they work?

GE,

4592

How line capacitance & line inductance varies with increase in height tower.

1460

Un-Answered Questions { Electrical Engineering }

What does the term power factor shows?

240

How to do maintenance of transformer feeder.

909

Why frequency changes due to load variation in power system ? i.e why when load increases frequency decreases?

1113

what is High resistance grounding and whatis the criteria for the selection of High resistance grounding

1241

can any one know is sbi interview based on merit or based on roll number

1062

What will be in Mahagenco Trade Test Exam? I want to know the same.

2777

When the relative speed between the magnetic fields of stator and rotor does is zero under steady state operation?

318

Define filter?

247

why we setting 95 deg and 105 deg in wti and oti of distibution transformer ? give the reson for that ?

2019

How dia computation perfomed in cold rolling mills .

2207

why the NGR (neutral grounding resistor) always OFF during DG off?

2665

how does the terminal voltage of transmission lines increase when a capacitor is connected???? This happens not only in transmission lines but also in all circuits. How??? When a capacitor is connected in a transmission line, capacitor also takes energy from the same supply. But how is it able to increase the terminal voltage??? Practically What sequence of events happen during increase in voltage???

1147

what is acceptable leakage current for 33kv cable while doing high voltage test for cable? how to calaulate the leakage current for 33kv or any rated cable?

2472

what are the major & minor faults that occur in an inverter and in UPS ? And how to repair and resolve them ?

1392

Hi everyone. Some Generators uses 3-Pole breakers with extra contactors for Neutral. Some uses 4-Pole. Why so? What is the idea behind this? Thanks in advance for the solution. Kr.

1165