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Electrical Engineering Interview Questions
Questions Answers Views Company eMail

wwht is wave trap used in ht line

4 6989

why use celling fan wing is two or three ?

2 4948

How can we calculate the KVA rating of a Distribution transformer from its core details?

ABB,

2069

How to calculate no of Lighning arrestors are required for protecting 50mX 50m*20m cubical building and locations of LA?

HAL,

1838

What is the min.& max distance between two earth spikes is required for measuring earth resistance of an earth pit? Is the manufacturer of Earth tester decides this? Pls explain.

ABB, HAL,

3 9513

We use ungrounded DC system (220V/110V) for control and protection system in substations etc. Suppose we have long 2 core DC cables running from our DCDB in control room to the load (length of around 2 to 3 km). Do we need to protect these long DC cables from earth leakages or not? If yes how?

Siemens,

5 11801

explain in detail HV & LV bushing connection in power transformer (110 / 11 kv 16 MVA)

TNEB Tamil Nadu Electricity Board, wbsedcl,

6 20015

How can I model an open-delta ground transformer for a network supplied by 4 unit GTG and power transformer in ETAP?

13762

When should I use earth leakage circuit breaker for incomer and when should I use it for each feeder seperately?

1 3717

How can I communicate with an Areva MiCOM P121 relay by RS485 port? In other word, which command can I send and what information can I have recieved? please send some refrences, please. thanks

3 10481

the distance from my office to d.g is aprox 400mtrs and voltage drops ibn my office near about 40 volt what should i do p[ls suggest.

6 7148

1.what is the funtion of chiller primary & scondary pumps. 2.what is the use of distribution lines & Types. 3.what is the use the thermal power stations & how much capacity.

Wipro,

1981

Can we operate a DG Set in paralell with Transformer ?

NDDB, Sobha Developers,

6 13720

what is the Connected Load (kW) or Contract Demand (kVA)of mahindra nasik plant??

9492

in flemings lefthand rule thumb indicate for....

APPSC,

2 5297


Post New Electrical Engineering Questions

Un-Answered Questions { Electrical Engineering }

what is the difference betweem star connected motor & delta connected motor?

2364


Why should be the frequency 50 hz 60hz only why not others like 45, 95 56 or anything , why should we maintain the frequency constant if so why it is only 50 hz 60hz?

1138


where is the need for short circuit test for 3 see is required and why? can you explain in brief with application

1956


What is the unit of attenuation?

1078


what are the 4 rules to start the motor?

2120


What do you mean by dependent and independent voltage sources?

1049


What is the most accurate way of testing ELCB?ELCB is better than RCD?

3330


hi can anyone pls tell me the eee interview core questions asked in l&t

2058


we have two generators different capacity on 15 MW and other 6MW at 11 KV , 15 MW gen. bus short level current 40KA,and 6MW short level current 25KA,, length of cable 100MTR between 6 MW from 15MW gen. for bus coupling . kindly tell any one can we use both NGR OR one NGR from any GEN. BOTH NGR has diff. rating. Tariq pakistan

1679


What is principle of Floroscent tube 36watt.

2045


What is bridge rectifier and explain with details

1919


hi,every one, i have to write the search paper on "performance policy optimization" of NGN (next generation networks). i need the material on this topic. can any body help me. please tell me any useful site where the good material is available and name of any reference book. it should be a great help for me.

1923


In radial network the source is fed from 1 end both ends at central

2127


In Electrical 'Single Line Diagram' cable nomenclature shows "2 X 1C X 630sq.mm to be provided for one incomer. The question is how many cable to be proved for one Incomer.

1751


i have install 750 kva distribution transformer at my site and want to do neutral earthing. what calculations should i follow to determine earthing conductor material and size?

2060