Electrical Engineering Interview Questions

how to extend relay operating timing in 24V dc relay card (without using Timer )

1396

what is meant by PU value ? anyone can you explain briefly to me ?

4090

need help, please can someone tell me how can i calculate the main breaker and branches breakers to distribution panels (MDB) depending on the load ampere .. i really need it but can't find any site >>

3316

What is maximum permissible length of cable from transformer (33kV/0.433kV) HT side to HT panel which contain VCB? In which standard i shall get this information.

MSEB,

14284

Which motor has more efficiency ;Synchoronous or Induction motor ?

TATA,

6728

2899

What is the basic difference between 90% stator earth fault and 100% stator earth fault, and its phenmenona?

17707

purpose of breaker contact multiplication relay?

ABB,

22883

if two heater of rating 1KW,200v are connected in series 100v supply what will be the power taken

3939

write a program that prints prime numbers from 1-20 in digonal form

1447

What will be done if we open the secondary of CT on load??

5018

what is the transiant condition in alternator? and how it can be prevanted?

1422

i alternator which of genarator used for excitor the what is reason?

3558

Hi.I want to ask how to calculate contactor rating current? for example I have 460 V , 100 A (induction motor) calculate contactor rating current?

3477

I want to know what must the CT ratio be on a load of 300A is a 3PH nutral to earh installation?

4523

Un-Answered Questions { Electrical Engineering }

write encoder 17 pins details? pin a;b+, pin b;w+,..pin s & t. what is the meaning of b+, w+? explain;

1610

33kv substation lay out details & line to line & line to earth measurements

2100

Define resonant peak?

579

how can tell us the AC indoor or outdoor which Tr and formulls

1238

what is the purpose that we use PLC system in power system

4095

If I want to buy a new Xformer for my plant what are the main parameter will I need to check?

1379

Installation resistance for whole installation of 16 kva & 25 KVA DTRA a) Between each conductor b) between conductor to earth c) installation resistance for each apparatus, each conductor to earth d) earth resistance for the system of earthing

1393

What is process of anneling transformer core

1381

what is relation between ct and pt ratio with multiplication factor of a energy meter? is there any other factor on which multification factor depend?

1758

why power not passes in plastic and rubber material

1471

How we can come to know the substation range,without go through any name plate ?

1404

What is resolver and glass scale in CNC how they work?

1652

In cable sizing calculation (determining the max route length of cable) why we choose the shortest length between cable length of full load current Iflc & starting current Istart?

2701

derive DC RMS value for half wave rectifier?

2641

What will be the effect if I use inverter as UPS mood?

1687