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Electrical Engineering Interview Questions
Questions Answers Views Company eMail

Send me Model Question paper for the post Scientific Assistant in NPCIL

7522

dear sir/madam i want to get some knowledge about RRB EXAMINATION(section engineer) 1- what is minimum cut off 2- wht portion is major portion . 3- can any body provide Sample paper. thanks & regards ashish

RRB,

1475

how can we know cable size for a given current? if any one have catalogue plz mail to vijay_raju369@yahoo.co.in

5 21556

what is mean by derating factor?

Essar,

4 19768

why in three phase 440 circuit in all phase current is almost equal L1-35 A,L2-34 A ,L3-31 A but in nutral when i check with clamp meter it shows 25 A?

OPS,

4 9856

What is meant by Active and reactive power?

Micron Electricals, SVIT,

8 10310

What is meant by Active and reactive power?

College School Exams Tests, Schneider, Torrent Power,

23 95573

why for transformer protection we protect tranformer from 3rd hormonics and 5th hormonics and what is the reason of generating these horminics in electrical system?

Essar, LG, OPS,

2 7349

what is difference between start imitation and start interlock for 3 phase motor protection ?

OPS,

2 6071

1.Whats the use of GNAC(Generator Neutral Accessory Compartment) 2. why generator or any other system require Neutral Grounding and not Phase grounding 3. what happens if any one of the phase is grounded. 4. if 15kv is grounded directly what will happen, why it should not be grounded like that 5. use of of NGTR(Neutral Grounding Transformer and Resistor) for grounding is helpfull and how

BEMCO, CSS, Powergear,

5 21106

what you mean by frequency of an igbt& how to find it?

1 2244

what is suitable alternative for an igbt?

4 6044

i have interview in Pepsi company what type of question will ask please send the question and answeer

Pepsi,

2568

hi frnds can any one help me ? plz send me placement paper of hpcl of Electrical streem .... plz send ....its urgent . The hpcl test is on 17th feb.

1 2459

Why are you like to join it job as a electrical engineering student?

Bhushan Power Steel,

4 6235


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Un-Answered Questions { Electrical Engineering }

The knee point of a current transformer is normally unique and known.So why in the nameplate of a CT they put the minimum value like this Vk> 400v.

544


How many kinds of E.L.C.B and how to work E.L.C.B

1223


formula for calculation of switchgears(i.e. contactor, fuse, cb, relay etc.), if load current is given?

1247


how can i determine the gear ratio for a rack and pinion system if an electronic gate operated by an electric motor is to travel a distance of 5meters in 15 seconds.

1153


when generator short circuit condition, the current how dissipates. or at short circuit voltage not available then current how can flow?

1381






what is the difference between directional & non directional earth fault with example please explain.

898


how many current required for hypo test

1054


why transmission is only 3 phase and not 2 or 4 or poly phases

1304


How REF protects transformer alone? explain with diagram.

606


I HAVE A INCOMING 100A MCCB TPN 25KA, CABLE LENGHT OF 80M 70MM CABLE SIZE FROM MAIN SUBBOARD TO NEW DB.BASE ON THE FAULT LEVEL SETTING OF 45KA.I WOULD LIKE TO FIND OUT 25KA ENOUGH KA. APPRECIATE IF SOMEBODY CAN ASSIST ME WITH FORMULA FOR THIS. FRM: JEFF

3035


how to estimate wiring ins roughing ins. and boxes

1561


Do closed loop systems require manual input?

257


Is Transol transformer oil comparable to nynas nytro libra?

2171


How will change the frequency in distribution side?

985


State the frequency for rc phase shift oscillator?

237