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

Electrical Engineering Interview Questions

Questions Answers Views Company eMail

WE know that for Inductor X=2pifL,In DC f=0,then X=0 so,V=IX=0;But In the DC excitation of rotor of AC generator,DC motor field coil which coils are inductor so why does not applying DC voltage short the rotor coil of AC generator and field coil of motor?If it would then DC source might be damaged but it is not happened. Why does the strand conductor of Electrical power transmission line make twist?

4387

What is the basic difference among IPS,UPS,EPS?

ABB, Navana,

2 18535

Earth leakage relay basic knowledge principle

Radiant,

2183

HOW to speed control of induction mototr using scalar control

3 6148

if one of the phase is failed to 3 phase IM. what will happen?

6 9220

how we calculate electrical load on a building according to area?

HFCL,

2796

why transformer are rated in kva.

Dalkia, Nalco,

5 8667

What are the necessary conditions for production of rotating magnetic field.

BARC,

4 10137

what is the purpose of shading ring or shading coil in electrical equipments.

BARC,

4479

what is differnce between oil transformer & dry type transformer ???????????

2 6425

Generally the incandescent lamps in bathrooms fuse due to high voltage at night.What is the simple solution of this problem?

4 5777

What should be the protection scheme for a 15kw, 3-phase motor working in a lathe machine.

2066

Why voltmeter is not connected in seris & ammeter connected in parallel ?

5 28205

why we use post insulators in no ofstacks at substation for supporting equipment ? why we not use single post insulator

3 5272

which type of cabel

DMRC,

2404

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Un-Answered Questions { Electrical Engineering }

What happen to the transformer if the OLTC frequently used for lower and raise occured 50times daily?

2050

Why the symbol of register is "zig zag"

1586

what is conductor copnstant of ab cable

1898

In electrical what is earth(ground)connection, wht is the importance of it, why it is recomended to maitain below 3VAC between Neutral and earthspecially in PLC used machines?

2215

Define filter?

1122

how to measure the transformer resistance values(dyn11)?and howmuch the minimum value?

2137

Why does amplifier gain reduce?

1054

If o/p power is doubled by how much does the sound increase

1089

how to find the voltage's of a transmission line plzz help with pictures i am not able to understand

1360

What is super thermal power plant? and how it will differ from normal thermal power plant

2284

Explain the working of any one cutting machine

1109

what is the Connected Load (kW) or Contract Demand (kVA)of mahindra nasik plant??

9492

Match the following a)(X'+Y') b)X'Y' C)XY 1)NAND 2)NOR 3)Carry

1928

HOW TO CALCULATE EARTHING SIZING?

2162

what is the saturation point of crgo lamination.

2234

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