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 4031

why voltage swells and dips in transmission line?

2 5917

why transmission line towers are longer than communication line towers?

3 4193

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

BMC,

1616

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

BMC,

1525

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 6105

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

4 5633

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.

1481

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

Oil India,

1496

what is voltage gradient?

Bhel,

8 33992

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 11295

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

3 4613

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

1469

Why nutral wir used thinner than phase wire

3 5346

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 5890


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Un-Answered Questions { Electrical Engineering }

List few applications of d.c series motor?

600


Why we use ups battery and dsdb battery in thermal power plant

1569


area control error

1200


What is a copper loss or i2r loss pc?

634


what is star delta starter? how it works? give its control and power diagram.

1541






What is ignition module of a CAT Gas Genset G-3508 Engine, Alternator SR4B Series. HOw its checked for correct functioning.Is it repiarable or replacable?

1356


can I improve the furnace power factor (10 mva transformer) by adding a capacitor bank before the transformer.Does system power factor vary a lot with the furnace PF?

1479


hi frnds what is meant by harmonics & what is meant by third hormonics,where its will occur ?thank u

1451


Why does the speed regulating system adopting I controller have no steady-state error? In this single closed-loop speed regulating system, when the input of the I controller Un=0, what is the output voltage of the regulator? What factors do the output voltage depend on?

1352


why we not used 11kva as a direct our electrnics component.

2257


sir iam from electrical and electronics branch ,can i appear for the hpcl offline requirtment? if yes please mail me on vikram_raju25@yahoo.co.in

1485


How can calculate the rating of a alternator for a given specific load with formula

1775


Could the power factor on electrical system can affect the registration of the kwhr meter or the CT/PT? 

1371


In all analog voltmeters or ammeter showing some small size symbols. as well as a star and in star 2no. digit, resister symbol,and other. what is that's meaning ?

1485


what is the effect of higher value of GD???

1274