Electrical Engineering Interview Questions, Answers for Freshers and Experienced asked in various Company Job Interviews

Electrical Engineering Interview Questions

Questions Answers Views Company eMail

what is the difference between arc and spark

ABB, Jindal,

2 7681

wat is d diffr btw shunt coil and trip coil in VCB?

NTPC,

2831

Why is remote backup preferred to local backup?

2068

1.why we are using metal oxide gapless block in lightning arrester,2.What is minimum and maximum rating of metal oxide blocks using in india

Areva,

1969

It is desired to flood light the front of a building 42 meters wide and 16 meters hig.Projectors of 30 degree beam spread and 1000 watt lamps giving 20 lumen/watt are availabl.If the desired level of illumination is 75 lumen/m and show a suitable scheme.Assume the cofficient of utilization, deprecitation factor and waste light factor are 0.4, 13 and 1.2 respectively.

3885

How much current will a 5 HP delta connected motor at no load will take?Is tat need a starter

GRB,

2 7762

What will be the resultant out put voltage when two different voltage rating batteries are vconnected in parallel? pls. answer with example if available.

1 3641

Wat will happen if R-phase of an alternator is connected to B- Phase of AMF panel fed from alternator

4 6436

how we are measuring the import and export power?

1 4438

how to identify conection leads of an unknown electric motor

2148

whats the application of voltage regulation? and whats the voltage regulation's device?

1895

why there is spacing between two rails in railway?

DS Group, RRB,

3 6455

how much percentage set in transformer diffrencialrelay

1 3550

Which type of DG need Netral Earthing?

Hyundai,

1 5306

Why do we need a separate control desk & PLC control panel in Boiler plant or coal handling plant? Can we provide cost effective Control desk cum PLC panel. Is there is an specific need for control desk.. kindly advice.

2365

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Un-Answered Questions { Electrical Engineering }

List the advantages of star-delta starter with induction motor?

1011

What is transister define the transister ammiter ,base, colector.

2223

2145

2. What are the parameters of EHT sub-station?

2359

This is reqd for a 1MW Solar power plant..We have 2DC outputs from the solar panels Connected to 2INVERTOR panels.. Output from invertor is 3ph,280v,500kva,50hz.These are connected to individual ACB.This has to be stepped up to 11KV ,1250KVA SYSTEM.Now can I use (1) one more ACBTO GIVE A COMBINED OUTPUT OF 1000KVA,280V & STEP UP THE OUTPUT BY USING a single two winding 3 ph transformer 11kv/1250kva. or (2)use the two outputs and connect to one three winding transformer of above rating..Pls suggestwith details.

2477

how to wiring it with contactor and timer together

1852

how is the incoming cable size calculated for a given current rating of a panel??

1935

what is the k var ratting of 1250kva

2091

What is ignition module of a CAT Gas Genset G-3508 Engine, Alternator SR4B Series. HOw its checked for correct functioning.Is it repiarable or replacable?

2188

volts=230 c=10mf a=??

2038

to vary valtage from 0 - max a variac is necessary . so how to design for high power applications nearly about 200KW power

2066

how external lighting design? please give examples?

1887

What is the permissible maximum flux density in transformer core?

1237

Sir, plz tell me how droop setting is done in parellel operation od DG set ? please give practical example ?

2134

Draw the vector diagramme for Asynchronous Induction Generator at noload,half load and fullload.

1987

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