Electrical Engineering Interview Questions
Questions Answers Views Company eMail

what is rated current and operating current?

1 4173

how u select control transformer for a mccb panels or any panels?for expample we hav 440 volts maim supply and control volts is 230v?


How to run 1ph motor(230 VOLTS its full load amps is 4.5 ampa))with 480 volts main(we didn hav neutral)Thn we go for step down transformer.Our load 10 amps,so we conisder this amps in primary are secondary side?

1 2899

140 is load amps for a equipments and what ratio of CT requied for installimg ammeter to amps montering purpose?

1 3483

what difference between thermal and bi-metal over load relay?

2 7786

How we calculate the spacing between the conductors in 11,33KV lines?


3 12662

If mutual flux is 1.2wb & power factor is 0.8 lag , then what is the Useful flux of a transformer?

Nalco, NTPC,


how we sesign the transformer give some specifion regarding design of transformers


To test Transformer we give HT side 440V to see wheather that it is producing 17.6V on LT to verify Voltage ratio is correct or not but when we give the 440V voltage to LT side then what will happen to HT voltage ?

Aditya Birla,

3 6913




How to calculate load taken by a cable?

3 4993

how to calculate current and voltage in a same circuit?


in 33KV or 66KV system which connection is aviable on high voltage transformer primary delta or star ?

3 5181

What is VFD, and how its work

5 7361

What different between kw and kva. why maser AC in kva.

3 4518

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Un-Answered Questions { Electrical Engineering }

What is the alternate solution for testing of polarity by using polarity tester while its milli ammeter does not works?


Dear all, i completed M.E(Power Electronics & Drives) 2011 passed out having 78% so i need job in core side but i don't know how can i receive the calls from electrical companies and i uploaded my CV in naukri, times jobs etc.. In that iam not recieved any mails from good companies so give me best procedure plzzzzzzzzzzzzzzzzzzzzzzzz..... Thanks, K.Linga Reddy Email-id:-lingareddykmthm@gmail.com Ph no:-08015402078


block diagram of 2 ups system connected in parallel mode?


what are the installation procedure of high voltage power transformer,CT,CB&PT?


What is the meaning of Insulation H for transformers????


What is the difference between DOL starter and star delta starter


we are having 15kw and 3kw motor both can run in same time , instead of using copper we are using ug aluminium cable , 35 sq.mm is suitable for its current carrying capacity..?


hi, i have 3x200KVA and 2 x 80KVA UPS with battery bank of 150AH 68Nos. and 100AH 204Nos., i need to install AC either ductable or PAC type, so can you help me to calculate heat load and capacity of the AC to install.


what is mean by D.O. in distribution line poles?


What happen when change order of CT in GIS feeder?


RATING OF LIGHTENING ARRESTER FOR 11 KV LINE IS 9 KV is ok ,but haw to calculate the KA rating?


The transmission does not have options: a)Partition noise b) Flicker noise c) resistance d) Short noise and reason


State ohm’s law?


what is the most permissible winding temp when we conducting a generator load test?(condition no load)


What are conduct on the testing in cf in ur site?