Electrical Engineering Interview Questions
Questions Answers Views Company eMail

how to design coil turns ?

L&T,

1578

how to calculate magnetic force genrated by a coil ?

L&T,

1768

what is method of dc current measurement

5 8138

How much energy save vfd if motor run on 50 Hz (full speed)

Reliance,

3 4540

How to Decide(calculate) Bush bar size for copper and aluminiam ?

Essar,

1724

why knee point voltage should be high in Ct for differential protection

NTPC,

1 4974

what are the difference between protection class CT and Class PS CT

13 30203

WHAT IS DC COMPONENT IN CIRCUIT BREAKER?

10 22037

How to calculate HT XLPE CABLE for 11 kv / 433 v , 1500 kva oil type transformer system? plz provide step by step calculation

Engineers India, Indian Railways, Polycab, Shashwat, Sitara Energy, Sonali Bank,

15 125473

Hi friends. m 3 years drop. now d company asks in d interview d reason 4 my drop.what shud b d probable answers 4 that which may not put a negative impression.

2 4012

why we use star connection on the primary side of a transformer?

DRDO, TCE,

5 16218

what is meant by a slip?

10 12643

why transformer is conneted to dc for polarity test.it doesnt work in dc?

ABB, KVPY,

1 6566

What differance between Circuit brekar and Isolater?

TATA,

14 19495

WHY HUMMING SOUND OCCURED IN HT TRANSMMISSION LINES?

6 9943


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Un-Answered Questions { Electrical Engineering }

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

2928


why does the magnetic balance tests at transformer?

1466


what will happen if multimeter(selector switch at DC voltage) and terminal at current is connected to DC supply?

1551


ROC converges if poles and zeros lie inside a. Origion b. Z=1

1832


What will happen if i used 11KV earth ht kit to 11 KV / 11 KV cable termination?

1029






what is motor capacity of 80TR chiller? and also say what is the formula related temperature, motor capacity, TR?

1876


Q) Write VBscript code along with QTPscript code in QTP tool for below scenario 1. Launch yahoo site(i know) 2. Do loogin(i know) 3.Click inbox link(i know) 4.Go to every page of mail box and count no.of read mails and no.of unread mails(i know) 5.Store page numbers, read mail count and unread mail count in a new excel file sheet 6.Create 10 types of graphs on that data 7.Do logout and close site(i know) 8.Save new excel files with graph

2072


previous year paper of ntpc bhel for degree in electrical enng

2809


how can calculation ate Amps for cabel. Ex-for 1sqmm wire hou many amps we can draw

2028


how to calculate slip ring induction motor stator and rotor currents??

1786


What is oscillator circuit?

722


how the CT and PT is connected in the circuit during testing of transformer explain with diagram

1549


1)How much current can a 3-1/2 core 100 mm wire carry? 2)What are the special cables required for explosion proof wiring? 3)In case you do not have coal and salt for earthing, how can you achieve good temporary earthing? 4)One horse power single phase motor is more likely to get hot than a one horse power 3 phase motor. Is it true or false, if true why? 5)What are the different types of soft starters for large motors?please explain?

4253


Why PT voltages are measured with respect to ground? What do u mean by voltage or current polarized.

1956


Hi everyone, I'm Lachuu, recently joined automation company as PLC Engineer. I have certain basic question, I request all big gurus and seniors to answer these question. Because this will be very helpful to me as well starters like me. How to design a control circuit (ex: pick & place - my current project) Yamaha robot PxYx series controller RCX222, using 6 cylinder double acting, plc keyence kv p16r 2 expansion unit for input and output each. How to select panel terminal mcb elcb powersupply. My main concern in some projects how to select dc power supply, mcb rcb(I came across dif bt b c d curves, but stil confusing, pls help me :-(. I would really appreciate all who are going respond to this question.

1535