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Electrical Engineering Interview Questions

What is switch gear? How it is work ?

3062

How is efficiency of DG set calculated? At many places I found the efficiency to be mentioned in percentage. But at some other places I found kWH/ litres. I want to know how dimensionless percentage value is arrived at?

976

How are load losses and no-load losses measured at site in a DG set?

903

HOW WE WILL CONNECT THE PHASE CTS AND NEUTRAL CTS TO REF RELY

3430

what will be the maximum winding temperature of 6.6kv HT motor 450kw, Full load current 49A. 50Hz Frequency.

DVC,

2178

what type circuit breaker is suitable for connecting 1000A load VCb,Mccb?

4267

725KW Three DG set Synchronised but DG no-1 power showing 750KW DG n0-2 power showing 500KW DG no-03 showing 500KW. DG is Shynchronised but why this different power showing?

3459

WHY WE ARE DOING THE EARTHING IN A SYSTEM. SOME PEOPLE ARE TELLING FOR PROTECTION. WHAT PROTECTION GIVE ME THE CORRECT ANSWER.

2871

What is the use of Exciter in generator? & what will be the current of Exciter in 500 KVA DG Set?

7853

is there a different b\w ground fault CB and earth leakage

2160

why the active power flow of some line is increased when the active power of out is cut ?

TAFE,

1217

i have 400/230v transformer and didnt done the neutral eatrhing. i connected one lamp to one phase and neutral to the earth. but the lamp is not glowing. again i connected neutral to earth and repeated the same. then the lamp is glowing. in the first condition i tested with a line tester also, at that time the tesrer is glowing what is happening i dont know can any one help me?

2269

A 60W,250V bulb when connected to a 230V supply will it give more light or less or will be give normal light?

4528

what happen when we add mentos in cold drink?& why?

1099

What is the material used for the core of a high freiquency transformer?

3769

Un-Answered Questions { Electrical Engineering }

List advantges of active filter over passive filter?

201

why dc is used in control circuit for mv & hv switchgear instead of ac

1009

How to calculate flow of water delivered by pump when pressure & size of pipe line is given

1347

What are the ratings of VCB, MCB, MCCB, SF6, ACB, and OCB?

642

why zero sequence impedance measurement is not applicable for single phase GT

1217

What are the specifications for getting approval of Substation?

1010

which type of effect of turbine and generator reverse power protection ?

3307

Define newton's law of viscosity.

222

Differentiate between kirchhoff’s first law and kirchhoff’s second law?

192

what will happen if ac and dc supplies given

1216

How to set the relay,,??

1206

Define unilateral circuit?

189

How to calculate ant test the burden of Current transformer

1497

how to calculate the size of the HT cable

905

could you measure current in parallel?

210