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Electrical Engineering Interview Questions

what is the power factor

8434

what is the operating principle of contactor(power).along with disection?

14375

in india why we not use frequency above 50 hz for distrubuting power ?

3434

howmany types of compresor is there? and how to calculate compresor capacity?

3739

how to calculate generator capacity?(kva)

SMEC,

17175

flush point of transformer?

3026

Hoe to calculate body earthing conductor size ?

IES,

7222

how can alculate the apfc panel rating?

12539

why are using bus ducts ? why not using cables

39559

How to select circuit breakers rating eg. if i select a circuit breakers of capacity 40 amps DC with operating voltage 28 volts and if i what to use same circuit breakers for 300 Volts DC application what is the current rating of this circuit breakers.

974

what is the defination of Cable database? What are the points are considered while preparing cable database? Is there any sample available for cable database?

1013

WE ARE PLACE A NEW 75 KW MOTOR FOR JPF.IT IS CONNECTED IN M.C.C. WHEN WE ARE STARTING M.C.C.INCOMER IS TRIPPED.THEN WE ARE CONNECTED IN P.C.C WITH A MM30 RELAY PROTECTION THEN WE ARE STARTED MOTOR WILL RUN SMOOTHLY.

1065

why the three phase transformer's star point does not sparks or seperated? while we often see that two phases touches each other it sparks and ocationaly conductor breakes out.

5852

Can we parallel two grid with different incoming voltage. Ex.let say one grid is 132kv and another is 220kv.

3149

GIVE CONDITION FOR MAX EFFICIENCY OF 3-PH TRANSFORMER AND D.C MOTOR

BARC,

5348

Un-Answered Questions { Electrical Engineering }

Explain (in simple ) - root mean square. whats its role in electrical fundamandal.where its used

1341

What is the function of probe in cro?

203

In India the supply voltage is 230 volt A.C. During the negative half cycle phase becomes neutral and neutral become phase? or what will happen during negative half cycle? how the electrons flow during positive and negative half cycle?

1060

What is the breaking capacity of transformer and how can we calculate the breaking capacity of tranformer

822

what is negative d.c. voltage, why this voltage is used in base transciever station.

1281

Can I use distributon class/transmission class Lightning arresots for protecting the building? If not why please explain?

995

how to select energy meter? have any calculation?

1905

Is there a standard depth of gravel fill in Substation Switchyard? Please give a design/drawing. Thank you.

4144

Why 15Amp. MCB is suitable to carry load of 1.5Ton Ac please Explain?

1241

3- What is the target from Zero Impedance, Single Phase Imp., S/C Imp. and magnetic balance tests?

994

How to check the Bushings of the transformer?

811

Hello to all, Please someone can send me HPCL ELECTRICAL Engg. Sample papers to me? Its urjent....my email address is.... raviasiapacific@gmail.com

1227

i m doing DEEE in part time,can i join regular cources in BE,,IF i join what the cources can i select like (civil,ece,IT) ,,kindly advice

1117

I need HT sphere gap calibration table. Can any body help me.

1096

After taking shutdown of 11kv feeder, if you see 5kv by phasing stick in the cable side, is it possible to close earth switch in cable.

1412