Electrical Engineering Interview Questions

what phase and neutral.

HP,

3777

why used in starter in tube ligtht circuit.

5607

Why used in layer by layer charcoal and salt used in earth pits.

CESC, HP,

56096

1. how much normal earth resistance in earth pits(neutral and body earth) and transformer neutral and body earth & panel earth.

84586

how much UPS neutral erath leakage current.

HP,

2253

Two 11 kv lines are feeding to common bus in a substation,I have one set of CT & PT(3ct,2pt), How can I measure both lines power using single set.

L&T,

7082

How do determine the Size of a Droop Current Transfomer for Paralleling of Two Generators, Say I need a Droop Current transformer for a 600 kW generator need to be parallel with a 800 kW generator, etc.

7585

I have installed capacitor bank at secondary transformer. cos phi is increase. but on load (far from transormer), it still poor. Can anybody explain it??

8342

What happen if LV supply is fed to a HT motor?

28123

What type of DC Generator is used for Arc Welding purposes?

27494

Wat wil happen if Transformer is operated at 100 HZ Frequency?

13813

What is the amount of no load current of 630 kVA tranformer voltage ratio 11kV/440V ?

14498

what is R Core Transformer. how it differs from normal transformers. dont search in net and post the answer.

852

when we connect a CT in the line will there be any loses in the line due to the mutual inductance of the CT.

1866

What is the difference between short circuit and overload currents?

IIIT,

49703

Un-Answered Questions { Electrical Engineering }

howmany electrician should maintain for a 1000 kva used plant... in kerala..

846

draw 3 phase rectifier diagram

835

what do u understand about FACTS? how they are useful?

725

What is the difference between diode and a transistor in terms of the direction of current flow?

937

Can anyone please provide me details of MCCB/Contactor/SFU rating calculations for a motor feeder..for example 50 kw.. not from type-2 cordination chart. i want manual calculations..

1075

what is the reactive power what is the use of it in system

829

Is it possible to use a S1 duty class motor for crane application (S4)? If not, why?

1011

there is an alternator 480 k.w, 400v,50hz, 4-wire running on load having leakage alternator body earthed current 38 A. is it within acceptable limit? if yes then give reference if no then how to bring within specified limit

690

how current is reverse from its normal direction during the fault?

1214

110

Is there any problem about which the drive (inverter) doesn't show/display the alarm and/or fault but instead of this , it doesn't work ? I want to know that could there be any kind of problem in the drive when the drive doesn't display the alarm and/or fault ?

740

In ht capacitor ckt we are using LBS Panel it having isolator with fuse, one of HT fuse flash over, so what is reason behind this event.

821

I need model question papers for RRB section engineer Chennai... Please send to my E-mail Id:- maitheerainbow@gmail.com

747

33kv Rated output avilable in market (any where in india)

894

Is it posible to instal one more SMDB from the existing SMDB and is it practical.

855