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Electrical Engineering Interview Questions
Questions Answers Views Company eMail

In a 11KV 3phase system do you need to earth both sides of the cable?

2 4752

what is Insulation monitoring device. where it is used? (in switchgear room or control panel or in field equipment)

1510

what is the main difference between simplex RTD and Duplex RTD?

6 69988

by using pump duty, how we will can calculate the motor duty(KW)? is there any standard or formula.

HP,

1351

why most of junction box vendors providing T5/T6 Temp class jb's for T3 area any special reason?

1421

what will be the motor terminal box connection arrangement (star or delta). on what basis it decided?

3 7697

what happens if the phase sequence of parrlel connected sys will changed & phase displacement

1 2612

What is the actual formula for transformer short circuit test? below i given rating of the transformer.. 1000KVA, pri 11KV, Pri amp 56A. %Z 5.95..

2 5018

What do you mean by per capita requirement of electrical energy in india

Tech Mahindra,

1477

why cant we use earth as neutral at home whereas neutral is actually grounded at transformer end?

4 5581

What is meant by a stray loss of a induction motor??? What is the equation to find it

2381

when a airgap of the induction motor gets larger does it draw more current ??? does it power factor gets lower?

3 3675

how to maintain frenquncy with syncronising sub-station for distribution

Suzlon,

1489

use of choke in APFC panels

Kemrock,

2 4587

What is the de rating factor of cable? What is the importance of the de rating factor in cable select

1708


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Un-Answered Questions { Electrical Engineering }

How will polarity test of Dy5 Transformer ?

1534


for compensate 315mh inductance ,how many capaciance required?

1434


In case of HV test on medium voltage cables, BS is asking for 4 U0 where as IEC is asking for 3.5 U0. Can any one advise me how this 3.5 times or 4 times U0 is derived?

990


What is the difference between diesel generator engine with and without turbo charger with the same capacity?

1012


why T/F winding temp measurement cts are odd secondary current ie,109A/1.2A/1.4A?

1149






how much value of resistance should connect to 15 kw, 6 pole 3 phase slip ring induction motor having RV-240, RA-42.

1249


how can service sitting be setted for MCCB?Example for sittings IR (CURRENT RATING),IS(CURRENT STARTING)IO (current operating)?

1238


what is the difference between single ratio, multiple core and multiple ratio, multiple core ? please explain.

1572


how to discharge 3 phase power factor correction capacitors

1828


i am in need of AC SYNCHRONUS MOTOR 30KW. ANY ONE KNOWS THE MANUFACTURER OF SAME. ALSO MOSFET AC CONVERTER 20KVA CONT.OUTPUT.

1314


Please define ohm’s law for a.c (alternating current)?

474


Which Class insulation is prefered for the sandwich Busducts ? Why?

1337


How to calculate the value of earth capacitance in a transmission line.

1553


control & auxilary circuits used for circuir breakers

1307


when it is possible kvrah lead & fundamental kwh be equal in electonic trivector meters (3 ph)

1298