Electrical Engineering Interview Questions
Questions Answers Views Company eMail

what is the minimum dielectric stregth of transformer oil.

HP,

25 53637

what are the affects of loose connection in electrical circuit.

HP,

13 43681

The objective of connecting a resistance and capacitance across gate circuit is to protect the SCR against

1 2355




what is the diffrantial relay???????why we use it on the MDB

5 4519

what is the meaning of the parameters labeled on the surge arrestor like 150/20 ???

3 4744

what is humming AC solenoid

Seagate,

2 4156

purpose of check value

Seagate,

1 1352

How to calculate the average power factor in 3 phase unbalanced system

MacLellan, Bhel,

5 16458




hi i have applied for lic of india south cenrtal zonal ,hyd. i didnt get hall ticket till now.let me know how can i get form internet

708

What are the different methods for calculating Short Circuit Curren?

3 3220

why transformer rating in kva?

7 5818

How to convert resistance value at 20 degree to 90 degree?

2 7007

In stepdown transformer 11/415 volt two nos.(R & Y)HT side fuse is blown ,what will be voltage of ry,rb,yb in secondary side

NTPC,

5 6597

How to calculate the cable size for particular load

Knight Frank,

2 5987

How to calculate the Efficiency of Chiller

L&T, Knight Frank,

2064


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Un-Answered Questions { Electrical Engineering }

What is purpose of reactor?.What is different between line and bus reactor?

715


why power factor is important?

4805


what is the difference b/w pvc cu conductor and cu breaded wire..?

1702


What is inverse definite minimum time lag relay? Where is it use?

1402


Proviiding the Dedicated N earth and individual Body Earths ,Finally these all looped /Now my Question :- will it not harm in case of Transformer Fault current flows in Dediacted N Earthing to Looped Body Earthing.

965






Why PS class CT is always preferred for Differential protection?

260


following are the questions asked in interviews: 1) Considering the short circuit fault, which switchgear is preferable, SFU OR MCCB? Which operates faster? whicg one is popular in Indian Market and why? 2)Define SCPD. What is type2 coodination? 3)Why the contactor rating is higher for the fuseless selection than for fuse selection? whether the ratinf of SFU or MCCB remains the same in both the cases? 4)If the HP rating is known then can you calculate the ratings of L.V Switchgear(SFU/MCCB, contactor, OLR) without using the selection chart?

911


where solid grounding and where grounding through ngr done and why?

1358


I want d.g.set our company

516


previous year paper of ntpc bhel for degree in electrical enng

1921


What is meant by Im=30mA@Vk/2. How to know the kee point voltage for CT design

1739


what is gridrotor resistance starter

632


how to calculate current and voltage in a same circuit?

768


what is vA rating and class of a ct.

643


Pl. brief about break-down maintenance of machine tool.

601