Electrical Engineering Interview Questions
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whats the formula for convert KVAR to FARADS

2 7673

We have three 33kv substations. All of them energised by same source.When i am checking the phase sequence between one substation to other substation (like R Phase to R Phase) by multimeter i am getting some voltage.Near to LT panels UPS panels are there. Can u explain whether any possible to happen like that. In Phase SEquencemeter is showing correctly in both substations. How is it happen. Explain me.Explain me communication signal will produce Phase difference on this case.

3 2531

What is AVR in Generators and How is it working.

4 5196

is starting current of induction is high or stating current of ransformor is hign ,for the same rating

BARC,

12 5775

Why is our voltage always seems to be 3.3Kv,11Kv,66Kvetc.. why not 40Kv,39Kv,65Kv???

3 3382

could i arrange a faulty and healthey battery bank togather in parallel , if your ans is not then why?

3 1909

could i arrange a faulty and healthey battery bank togather in parallel , if your ans is not then why?

3 1837

what is phase angle ? and also tells me why my phase-phase voltages are 390 rather then my single phase voltages are 221 and 223 respectivly?

2 1760

why we +ve load distribution in 24v and -ve load distribution in 48volt in the telecom sector.?

2 1878

what happen if we supply ac to the field of a alternator?

5 2812

how to calculate power consumption in slip ring motor at different step

ABB,

560

in ONAN type transformer winding temperature is lower than oil temperature at evening time but morning winding temp is higher than oil temp what is the reason?

Areva,

2 3197

how the grounding[earting] is achieved on ships.

1 2218

1]how the voltages and frequency are achieved on ships. 2]how does the line and phase voltages are related on ships.

3 1421

how many units will 100 kvar capacitor consume for one day?

Philips,

2 4304


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Un-Answered Questions { Electrical Engineering }

hi guys please tell me the procedure for mesuring the coil resistance of 3ph induction motor?

286


What if the difference beween internal and exrteranal LBB?

110


What is the HVDC Transmission System? What are the conditions applicable to lay an HVDC Line?

747


Pls tell me whether we can use EN3A material for shafts of Permanent magnet alternator.What will be the effect of magnetic and nonmagnetic material for shafts on magnetic properties of PM rotor .

1663


can we synchronize star system generators with delta system transmission line ? and how ?

1167


How will calculate losses in an multi core Aluminium LT cable of different sizes & upto what length we can use a LT Cable ?

628


Why to keep capacitor bank off while generator running.

142


please anybody help me to find out the BHEL trainee Exam previous year questions papers . if u ve pls. send it to surekhared@gmail.com

411


1 “earthing” for bonding of equipment and circuits to common plant earth electrode potential, 2 “protective earthing (PE)” when this bonding is required for personal safety provisions 3 “grounding” for interference suppressing bonding of screens, sys-tems with ground level 4. low-impedance earthing ? 5.primary earthing system and secondary earthing system what is that? 6.earthing electrode or mesh net earthing electrode ? very confusing , simple but very informative help required ? i will be very very thankful to you guys.

267


how does the thyistor work in dc drive?

447


what is meant by 2 within a star in a voltmeter dial?

450


I WANT TO know WHICH WAY IS BETTER FOR CONNECTION BETWEEN POWER TRANSFORMER AND MAIN DISTRIBUTION PANEL. 1-IS BETTER WE USE CABLE? 2-IS BETTER WE USE BUS DUCT? my transformer rate power is 2500KVA

1088


what is mean by kneepoint voltage? when it will happen? ( my doubt is, if CT secondary is open means ct get saturation or blas? what are factors are required for calculations? plz give currect anws:

384


Show the schematic arrangement of diesel power station layout and give its principle of operation.

1121


Write down the brushes of a de machine.

419