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Electrical Engineering Interview Questions
Questions Answers Views Company eMail

why we use perllel conection system in the wiring?

Airtel,

4 5375

why the transformer neutral earthing is to be done by copper flat only,if we use GI flat what is the disadvantage.

 2 7350

HOW TO TEST A LIGHTENING ARREST ER ?

Bhushan Power Steel,

1694

FOR 3 PHASE DISTRIBUTION,WHY WE USE ONLY THE VOLTAGE LEVEL OF 440 VOLTS

AITM,

1 3052

what is technical diffrence between table fan and ceiling fan

 5 5037

In dc motor starter there is less voltage required for holding contactor that's may why it is called no volt coil. but in ac starter why holding contactor is called no volt coil.

JSW,

2 4635

If there is unit power factor in a power house and a capacitor bank used in a factory at resistive load . In this case, will there leading power factor in power house across that factory.

 2 3444

where was current transformer protection units used and why??

 1539

there is a # KVA Transformer of 11 KV/440V, in simple(not use formuia) how can you calculate it's HT & LT side current.

Construction, wbsedcl,

5 21522

what is the solution for meger test failed the MV cable?

 1 3513

What is the formula that shows relationship between voltage and speed in an induction motor

 2 4065

i have 90kw motor.so i choose connect cable .please what is parameter checked so please give to formula

May Baker,

1720

show the single line diagram of star delta starter with single phase preventer

4093

What safety followup during kWh meter isolation

 1596

what are the things that can cause a three phase motor to crawl?

 1 2860

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Un-Answered Questions { Electrical Engineering }

what happen if the parallel generator phase angle shift by 1 degree in manual mode

1552

What should be the length of transmission line so that we can see/obtain the full sine wave of voltage??

1397

How does an oscillator differ from an amplifier?

654

how can we change the polarity of Alternating current rapidly? how frequency of ac can be controlled and changed easily?

1570

what is the earth current,reverse power,electrical trip generator short circuit,low voltage, high voltage please discribe me

1633




i need to give section engineer (electrical engineer) for RRB. Please suggest some book

1445

how to calculate magnetic force genrated by a coil ?

1717

I HAVE A INCOMING 100A MCCB TPN 25KA, CABLE LENGHT OF 80M 70MM CABLE SIZE FROM MAIN SUBBOARD TO NEW DB.BASE ON THE FAULT LEVEL SETTING OF 45KA.I WOULD LIKE TO FIND OUT 25KA ENOUGH KA. APPRECIATE IF SOMEBODY CAN ASSIST ME WITH FORMULA FOR THIS. FRM: JEFF

3501

HOW WE CAN REDUCE THE CIRCUIT COMPLEX OF STAR-DELTA STARTER .BECAUSE NOW WE USING ONE TIMER RELAY & THREE CONTACTOR FOR MAIN,STAR & DELTA ?IF ANY IDEAS PLZ POST.THANK U

1987

If a air condition consume 2.50 to 3.00 amp then how much it will consume in watts if it is running 10 hours out of 24 hours????

1438

Whether should be the oil level in OCTC transfomer? It should be upto winding immersed completely or should be upto tap changer s/w? How it will affect the performance of the transformer. Rating may be 33KVA

1395

what is W.T?specify the acceptable range?

1501

what is the difference between switch yard to residential area.and how much required it.

1260

What happen when neutral point connected to core balance current transformer? (Neutral point of an alternator of a 180KVA DG. Neutral point connected to CBCT means enter to the CBCT)

1832

What are operating procudures & Safety precautions to be observed while operating OLTC in manual mode ?

1444

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