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

Electrical Engineering Interview Questions

Questions Answers Views Company eMail

How harmonic block test are conducted on relays ( Siemens,Areva ect )power transformer using omicron kit?

Siemens,

2271

What will happen if we do not provide earthing to the newtral of a power system ?

Jindal, NPCIL,

2 6008

What is the difference between newtral earthing and body earthing?

JK Lakshmi Cement, NPCIL,

3 6907

give me battery AH calculation in U P S

1 4399

what is the difference between relay and a contactor.

Siemens,

5 17269

what is the sludge current

2121

check list for anuval maintatince check list of oil transforms

2 4338

can volts/Hz be relied upon to use 460v,60Hz electric motors on a 380v,50Hz power supply?

1 3633

Where double earthing is required? Is there any power specification to have double earthing?

Delphi,

10 48581

What will hapen if we connect more capacitors than required for powerfactor control? Exactly what will be the effect on power system?

Mandovi Pellets,

2 5263

what is a panel board?

1 3811

Can u explain : how capacitor act when the supply is given is a.c and d.c. I know that when d.c supply is given then the capacitor charges and becomes open circuited. But please say about when a.c is given. I have seen that when a.c supply is given ,it charges and discharges, But when we plug in capacitor to our daily supply and take it out ,then we join those wires spark will appear,which seems charge is present ,but when a.c is given it should charge and discharge

3 4808

can we use the step down transformer to step up transformer

6 8929

How to design the earth grid for lightning protection in an industry

2 4670

can we run all LT motors at 360 volts which are normally rated 415+/-10% voltage rating

Meinhardt,

2 4137

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Un-Answered Questions { Electrical Engineering }

What is the use of bundle conductors?

1184

WRITEDOWN FEW RELY CODES

2269

what do w do when the output of generator is fluctuating?

2259

what r the checklist while installing 500 kva transformer

2330

What Should be the value of Vector Surge angle at Tripping and how to calculate it?

2055

why voltage form factor of PT are increase , when it is ecpected heigher spikes in system. how it is calculated.

2137

What is the basic principal, by which DC voltage level is increased more than the supplied AC voltage during conversion. As upto AC level it is contorrled by firing anlge but after maximum level how is it possible.Please clear picture. OR we have to supply the higher level AC?

1967

The windings of a transformer are divided into several coils, because?

1283

Explain the different regions in frequency response?

1081

When calculation of fault current and fault Kva is to be done,why always we use per unit value and why we consider the base kva?

1901

difference between high and low impedance BUS BAR relay??

1618

how to find ratio of CT & PT in 66/11kv 12 mva supply system ? explain with calculation.

2409

i have to install a HT panel, what components, I have to use in this and what will the diagram of that diagram,please tell me each and everything.

1811

How many types oil using in transformer ? How many letars using in transformer..?

2109

A 3-phase IM is supplied from 50 Hz system. It runs at speed of 1440 rpm and slip equal to 4 %. Calculate number of pole pairs. A 1 B 6 C 2 D 3

2020

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