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Electrical Engineering Interview Questions
Questions Answers Views Company eMail

We in my plant one of the transformer showing neutral to earth voltage is 22V how to solve it

3 3722

why voltage swells and dips in transmission line?

2 5675

why transmission line towers are longer than communication line towers?

3 3975

WHAT IS IEC? & WHAT IS BENEFIT TO PRODUCT FROM IEC?

BMC,

1526

WHAT IS MOBILE SUB-STATION? & REALLY BENEFIT IN INDIA

BMC,

1432

why in some cases the receiving end voltage is higher than the sending end voltage in transmission line (called 'Ferranti effect') ????? whts the reason behind tht???

3 5832

What's an AVR? What's its purpose in Generators?

4 5274

Hi If connecting a temp generator 670KVA .415kv with step up Tx .415/11kv. I am given Generator impedances Z1 Z2 Z0 to 100MVA base. Do I need to work out the generator fault current by using these impedances i.e gen rating / impedance. Then use this as my source impedance for the calculations that follow.

1327

How to run a three phase motor into single phase........

Oil India,

1422

what is voltage gradient?

Bhel,

8 33230

1)Why potential transformer primary site grounded? 2)can be loop between neutral & body for grounding? 3)What is the difference between ELCB &RCCB? 4)Why we use iron core in transformer insted of wooden core? 5)what is the principle of excitation? 6)Why we test the core balance test for transformer? 7)what is creepage?What is the creepage length for insulators at different voltages? 8)How much type of relays used for differential protection of generator,transformer & busbar protection?

5 10836

How can we Run three phase motor when only single or two phase supply is available ??

3 4328

what is the affect of earth's magnetic field on the frequency used in aircraft???

1377

Why nutral wir used thinner than phase wire

3 5063

Which is is best option for 33 kv line incomer.I am Desinging the panel for new projects and i would like to get Your opinion on this Vcb or sf6. Please help me with your replies. Thanks D p singh

6 5437


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Un-Answered Questions { Electrical Engineering }

List some examples of renewable energy?

616


what is the ATS .And how it works.

886


Explain bypass capacitor?

487


when we have to use UPF wattmeter and LPF wattmeter? what is the difference between UPF and LPF wattmeter in terms of construction?

1730


What is the permissible maximum flux density in transformer core?

517






Explain the method to keep noises low in a control system?

462


hi everybody how to design string combiner box (scb) internal parameters like bus bar and spd (surge protection device and fuse which place to set that,and also bus bar one particular cross sectional how much heat generated and how much power loss tell me Clearly and briefly

1315


If an electrical component has a positive temperature coefficient, how come such components have high power losses due to heat if current decreases when resistance increases? assuming power given by I^2*R whereby the Resistance is infinite.

458


How npn and pnp transistor works

469


Any one who apply for Ferro Scrap Nigam Limited cn join with me at rajuhalder@indiatimes.com or 09669717028

1421


What is inrush current?

478


is there any current and voltage drop on liquid resistance starter water/soda tank ?

1294


redundant connection in contactor?

1883


why there using acb enclosure in big buildings

1300


Draw the line diagram of diffretial relay connected to transformer?

1795