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Electrical Engineering Interview Questions
Questions Answers Views Company eMail

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

1289

please send the IS strandard for electrical to sakthi_murugan86@yahoo.co.in

1336

If I have a motor of 1MW with 6.6kv, running at 35% load, how can i save energy without reducing the load ?

Reddy Labs,

2 3291

What is the advantage and disadvantage of dry type transformer?

Bhel,

5 16612

is there any difference in reading or error in value, if we connect the R phase in Y terminal and Y phase in R terminal of electronic energy meter of 11 kv feerders???

KSEB,

1 3142

why inuctive drop is not consider in DC MOTOR

2 2623

what's the difference between abs/inc encoders. apart from the position remembrance what are all the other differences. and what's mean by grey code.

1142

what is reactive and active power?why we need power factor correction?

2 3464

why inductivedrop in dc motor neglected

2 3685

I am selected in OCL(Orissa cement Limited), but they have a Tech PI round their at their plant.Anybody has any idea that what kind of questions they are going to ask??Please guies help me. I am in serious headache.I have heard that huge elimination is done at there.

3561

why we use capacitor in Fans not resistor?

Vardhman,

4 6101

how can i determine the KVA/MVA rating of transformer precisely?? is there any standard test?????

1410

Why there are semi conductor layers on conductor and XLPE insulation of HT cables

1 2344

Does all the output contacts (N/O as well as N/C) of a Numerical relay operate when relay receives a binary input/inputs or contacts are designated to specific logic input/inputs and only these contacts operate?

1241

one cable insulation resistance 200 mega ohm. how find 250 meter cable resistance.

NTPC,

2 6023


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Un-Answered Questions { Electrical Engineering }

comparision between ACB and VCB

1531


do anyone out there know where to find a compleete list on acronyms/abbreviations used in offshore electric engineering. MCB - Micro Circuit Breaker, MCCB-Mouldes Case Circuit Breaker, ELCB-Earth Lekage Circuit Breaker, ELMCB- etc.....

1113


why we have to particulary use ACB for below ratings,even available of MCB,MCCB with that range ?

2095


Explain the experiment on ward leonard method of a speed control on a dc shunt motor with an suitable circuit diagram.

1715


Which is the largest hydropower station in the world?

252






if a 3phase 100kva distribution transformer , 400 v,50 hz, 4-wire system is loaded at 160 k.w mostly 1-phase Lighting & Airconditioning split a.c load what will be the net effect on the power system in terms of voltage, powerfactor, current , efficiency of xformer

1062


In cable sizing calculation (determining the max route length of cable) why we choose the shortest length between cable length of full load current Iflc & starting current Istart?

2366


What is signal flow graph?

255


PLS SEND THE RRB CHENNAI MODEL QUESTION PAPER my email id is ganesan98655@rediffmail.com

1213


A 230V dc shunt wound motor has an armature resistance of 0,15Ω.When operating on no load at 650 rev/min the armature current is 6A . The motor takes a full load current of 85A. Calculate the full load speed if the field flux is (i) maintained constant (ii)reduced by 0,03

1148


why i can not use thimble on capacitor duty contactor

451


working principle of oil startar

1026


A 11KV, 1200 A breaker combination fixed in a cubicle for HT motor.Is normally for 11 KV motor fuse is using? if Yes, What range fuse is required?

1106


Distinguish between nuclear power station with thermal power station for initial cost, starting period, cleanliness, and transportation of fuel

1154


What is T’Q and X’Q and X’D ? and what is saturated as well as unsaturated ?

886