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Electrical Engineering Interview Questions
Questions Answers Views Company eMail

what is ATS?and its function or operation in power system with its layout.

DLF,

1 2795

1.what is the reason for transformer and lightning arrester blast in 33kv system

ABB,

2007

How to connect a ELCB with contactor and relay ?

1400

Why a tesa lamp is glow between two phase?

983

what is resistance

AITM,

6 3906

why inductancce of armature inductance of dc machines is neglected?

APPSC,

2 7880

from generating station If 400v LT line length is 1000m how much voltage is drop and how do i calculate it? which cable will be use for this line?

1076

fuses rated by amperes but not power,why?

Blue Star,

3 4310

can any one explain about when EB supply failed then how the load will transfer onto DG's step by step.

1 1955

dear all, How do i increase UPS (1000VA)backup time ? i have connected 2 12v wold you please 120 aH battery externally. ups charge the lead acid battery only 12.7 volt. backup time only 10.00 minuts and gose off. can any one of you help me?

Technomax, ups,

1 1465

What is the purpose of Vector Group in transformer?

Andritz, ThyssenKrupp,

1 3194

how to calc. current for 5MVAR,50hz,33kv

1 2428

In a 3 phase system a neutral exists so that any unbalanced currents can flow through it towards earth.... but a phase demands a particular current as per the load attached to it....then where does the extra current come from the goes in the neutral??....I mean in an unbalanced system a phase demands a current as per its load attached....then where does the unbalanced current come from??

1 1935

I am having 120KVA UPS,which is connected to DG & normal power. What is the power drawn by this system when system is running on DG ????

2 2374

how to get electrical supervisor competency certificate in gujarat. i did 3 year diploma in electrical

1595


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Un-Answered Questions { Electrical Engineering }

defult setting in p220 micom motor proction relay for 11kv,640kw,f.l.a.-40a,1440rpm ht motor?

2671


How can we find the breaking capacity of a Load breaker switch (LBS) fed from 11 kv supply??ex:50KA, 26kA etc???detailed step vice answer pls.

1094


What is the Difference between Ac Drives and Dc Drives? According to application, speed, Torque, cost, Reliability, Construction, Motor etc... Thankyou !!!

1208


Can I use star delta connected induction motor for dual supply voltage?

1076


volts=230 c=10mf a=??

1080






what is counter poise conductors

1087


What are the conditions for sustained oscillator or what is backhouse criterion?

177


How to measure the earth resistance value in a concrete pavement(flood light area)?

1177


What is meant by coupling capacitor?

167


sail kaott diploma ece ke interviw me qus.kis parkar ke aate hai aur G.S me kya puchate hai kya sameedyaan me kis parkar ke qu.puchate hai

2356


why the rotor current becomes in steady state during high slip region? please verify with equations.

1132


how u measure/calculate renge of capacitor,capacitor has no any rating tag.what is the theory of measure of capacitons.

1050


Logic using 1 kV or 1,1 kV grade in house wiring Low voltage cable. Explain/suggest? some use 1kV and some prefer 1.1kV grade insulation low voltage cable why??

617


why should the lowest unit of a testing transformer ( cascaded transformer ) have higher power rating??

1435


What is difference between unity power factor wattmeter and upper power factor wattmeter? In short circuit test of transformer the wattmeter used is unity power factor type or upper power factor type wattmeter?

1652