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Electrical Engineering Interview Questions
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what is the basis for selection of Protection CT class ? How anyone can decide whether to go for 5P10 or 5P20 ?

 3 5325

What is PCCB?

ICEL, Schneider,

3 6820

Why LT cables are not sized based on short circuit capacity.

 3 4891

I am final year b.tech student..i applied for gate but i am not interested any of my engineering subjects. i am interested in management wise.. is my option correct after b.tech..

 1 2837

Hi,I am working in abroad for more than 3 years in a company operating with 11kv and 6.4 MW power. I need c licence in India,can I? some other says only i can get if i work for 2 years in india only! anybody kindly clarify by doubt.Thanks

 1460

IN A DY11 GROUP DISTRIBUTION TRANSFORMER WITH NEUTRAL EARTHED, WHAT WILL HAPPEN TO THE SYSTEM VOLTAGE & THE EQUIPMENTS IF EARTH GETS OPEN ON LOAD?

 2 4885

where we use the SFU & FSU?

L&T,

1980

Why Auto Transformer is called "Auto"? What is the logic?

 1 3368

my UPS is 600VA with 0.6 p.f and i use it for my computer which has 450W power supply unit, a monitor of 633nW and speakers. Can any one explain this.. because the output of UPS should be 360W (<450W)

 2 4310

I have been using an 600VA with 0.6 p.f UPS with my desktop which has 450W power supply unit. Can anyone explain how can this happen . Because the output of the UPS is 360W (600*0.6) (<450W)

 1662

what is meant by generator differencial protection?

 1 2834

what is meant by residual over voltage & residual earth fault ?

 8426

in 400 kv system why should trip both side CB when we give hand trip?

KPTCL, NHPC,

1 6691

Why material of brush is carbon in motors why not other material.

NTPC,

5 7678

how to mesure the earth pit value and what is the minimum value of single earth pit?

 3 5251

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Un-Answered Questions { Electrical Engineering }

What is the purpose of stablization resistor in high impedance bus bar protection

1522

what is the function of capacitor duty contactor in an capacitor panel???

3611

Why have to use copper cable for local isolator to motor ?

1651

What Maximam Gap Taibaar & Bush

1800

What is the function of RCBO? What are the different sensitivity ratings & each application?

2134




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

1541

How to calculate approximate load loss of a distribution transformer by knowing %ge imp of transformer?

1740

HOW WORK HEAT PLATE EXCHANGER

1515

What is the Diff. btw Manule Pull Station & Manule Abort Station Switches used in FM200 System??

1385

What effect does a very low impedance have on the Voltage regulation? On the short-circuit current?

5825

Please elaborate th´evenin’s theorem?

684

I am completed DEEE in tamilnadu, now i am working in andhrapradesh with 2.5 year experience in relavent field. capacity of the tranformer is 11KV, 1MVA Transformer, i am eligible for getting c licence in andhrapradesh pl help me.

1123

Can anybody just suggest about the scope of Electrical design with ETAP software?Just guide me?

3282

how can i use REF and diffrencial relay both in 1 CT core for transformer protection?

1366

how to calculate single phase motor efficiency ?

1512

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