Electrical Engineering Interview Questions

How to calculate the heat load for a electrical room

1818

what is the difference in MCB, MCCB, RCCB, ELCB, & MPCB (motor protection circuit bracker)

173977

How can we calculate the rating of capacitor bank to be connected for a particular load(ex.100kw)to improve the power factor from 0.8 to 0.9?

15017

when neutral will carry the current?what could be the magnitude?

9310

if we use fuse in neutral what will happen?

L&T,

12529

What is Ten Delta Test ?

25021

What is the importance of Form B to state Electricity Boards?

2306

what is the importance of Partial Dischage test for Electrical Equipments

684

The potential difference between a phase and neutral is 230v , but the potential difference between two phases is 400v. why?

HCL,

10046

Suppose the incoming power is 11 kw, but the load require only 8 kw means how can we save or use the excess power?

2860

In 90 kva alternator that produce the output voltage is 115(p-n),200(p-p) at 1500 rpms means what ampere it produced ?

742

What is the difference between INVERTER and UPS?

9370

what is the use of earthing ?

27640

how we protect the motor & what are the components required for that ?

2589

Why 60Hz frequency is used in America what are all the benifits?

6257

Un-Answered Questions { Electrical Engineering }

how to define tell me about self

747

IF DISTANCE IS 100METERS B/W AMP.METER AND CURRENT TRANSFORMER WHAT WILL BE AFFECT IN ACCURACY .METER CAN SHOWING ACCURATE CURRENT OR NOT IF NOT WHAT CAN I DO TO GET 100% ACCURACY.

677

What are the basic & Majour problems in UPS ?

828

How to calculate flow of water delivered by pump when pressure & size of pipe line is given

1051

if in 3-phase system voltage=440V,frequency=60Hz, current=400A. then if it is single phase then current=? and if it is single phasing then current=?

1240

Why LED light has advantage of rapid reflection ,although other lights alse reflect.? and this light is considered to be best for transmission usage in case of Free optics

703

Why does the rotor rotate?

977

low frequency protection why recomend?

911

what is the star delta connetion and how can do it a three phase motor with control witing with picture

989

why the starting voltage drop in a cable needs to be limited?what is percentage of the voltage drop allowed during starting?

677

what is earthing transformer? draw the winding dia.of earthing transformer.

511

power transmission pole used one support , that only for support or earthing

657

WHAT IS MEANT BY DERATING OF THYRISTOR?

1576

Brushes are placed at magnetically neutral axis,when brushes reach that point,the armature conductor gets shorted,but it can be seen that the dc supply is also shorted,wont that get damage? help me plz

968

I COMPLITED MY B.TECH AND 10TH CLASS WITH 70%MARKS BUT 12TH CLASS 55%MARKS..CAN I GET INDIAN RAILWAY RECUREMENT EXAMINATION?

956