Electrical Engineering Interview Questions
Questions Answers Views Company eMail

How To increase Knowledge Of boliler regarding To Only Electrical Field..

316

What is the difference between PLC and Embeded system

273

How capacitor connect in 3 phase supply???

L&T,

1 554




PAC and simple Ac different

202

Why High voltage are generate noise ?

207

what is KA rating and how can we choose switchgears on applications

234

Why can't we parallel Voltage transformer secondary circuits?

213

Why can't we parallel the secondary circuits of two voltage transformers?

238




we have 3.5MVA-11/6KV transformer. how can we calculate earth fault current and NGR calculation?

IGC,

284

If one ct is reversely connected in Y system what will effect in kwh and kvarh meter?

1 421

Explain about how is it working Earth fault'relay and wahts the resistance value of earth bed

279

Earth has zero potential then what would be the neutral potential ?

JLL,

214

What is the formula for selecting the cabels according to load? How to calculate what sq.mm cabel to be used?

247

How to select batteries required for ups and the inverter if we Known load? And how AH is selected of battery?

Vodafone,

201

What is the maximum and minimum rating of UPS?

Indiabulls,

230


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Un-Answered Questions { Electrical Engineering }

how to select the automotive wire size by mathematical calculation. for xenon headlamp with ballast. the ballast given data voltage 10-17v,current permenant 6amp, run up phase is 15amp, peak at swicth on max 400micro sec is 40amp.the sum of cable resistance is 150mohm.please provide referenc document if any for relating the peak at switch on current,time & wire wire size

1087


what is the standard values(Megger test) of resistances between L&N,L&E and N&E for a system on IEE regulations?

980


Why the power generated in dams is complex power? Why the generators in dams cannot produce Real power directly (i.e power which has zero reactive part)?

663


Is there a diode made that works with AC 120 volt 20 amp? If so can it completely stop all current flow in 1 direction at all times?

5090


how to select fuse rating for a 3-phase motor ???

607






If we need4× 50mm sq cable but it's not available so we can pull 4×25mm sq 2cables

136


Why do we need interlocking in a HT metering or Ring main unit switchgear?

813


Why phase sequence must be same in any ht motor or generator circuit?if phase sequence doesn't same whatever will be affect on circuit?

993


how load of a turbo generator can be increased

722


How to calculate VCB rating for 33KV ,25 MW Power line?

337


why does a dc machine has high efficiency while working as a generator than as a motor ..

790


what is the differebt between ac and dc fuse?

1047


Good day everyone,currently in our premise we using 30kw slip ring motor with resistance bank which we use as forward and reverse at conveyor bar handling. So,my question is how do we calculate the resistance bank which is suit the motor. Kindly,assist me... thank you

483


I am experienced with house and industrial wiring but I don't have any licence how can I apply an licence and which type of licence i can get i didn't complete deee just only experience

519


Hi all I had applied for the RRB test in the ELECRICAL category. I would be pleased if any of you can sent me previous year question papers. Please forward the question papers to varshashahi@yahoo.com Thanks and regards Varsha

971