Electrical Engineering Interview Questions
Questions Answers Views Company eMail

what is the difference between arc and spark

ABB, Jindal,

2 6501

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

NTPC,

2363

Why is remote backup preferred to local backup?

1499

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,

1526

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.

2984

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

GRB,

2 6732

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 2879

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

4 4857

how we are measuring the import and export power?

1 3126

how to identify conection leads of an unknown electric motor

1563

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

1420

why there is spacing between two rails in railway?

DS Group, RRB,

3 5052

how much percentage set in transformer diffrencialrelay

1 2821

Which type of DG need Netral Earthing?

Hyundai,

1 4521

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.

1876


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Un-Answered Questions { Electrical Engineering }

I am getting above 60 V as open delta voltage against single phase unit ICT at tertiary delta formed and ICT getting trippped on NDR. ICT tested and found in order. PTs provided on tertiary are tested and in order. what may be the reason?

1517




1912


What is the maximum percentage voltage drop (vd%)for a motor control center

1557


Do any one know exacatly when the results for NHPC held on 8th march 09 for engineering trainees will be released ?. if so please post it, i'm eager to know it.

1694


when 20hp 3 phase motor start no load condition in star or delta connection.find current and write formula.(tariq)

1534






What is the bundle conductor?

737


What is the difference between multimeter

1461


At what factor resistance r of a conductor depends?

647


fuel-air ratio in a petrol engine fitted with suction carburettor,operating with dirty air filter as compared to clean filter will be

624


how to select diiferent power transformers of same capacity on no load loss and full load loss by economical point of view.?

1516


What are approaches to tackle sedimentation problem of reservoir?

596


A parallel flow heat exchanger will perform better than a counter flow heat exchanger. State if the statement is true or false.

779


ult of expression 'document.FrmQF.myem

1670


Why dry type cast resin transformers tap link blast in HV side while power shut down times on load?

1806


please send me the L&T Emb. sys. placement papers and entire details of pattren

1854