Electrical Engineering Interview Questions, Answers for Freshers and Experienced asked in various Company Job Interviews

Electrical Engineering Interview Questions

Questions Answers Views Company eMail

Basic motor transformer generator

eCentric Solutions,

1430

How to perform a DC resistance test In Alternator and their proceduces?

1689

if the motor rated speed is 950rpm. how to change the above rated speed? is it possible?

1377

what is difference between KW and KVA

1 2212

how to select rating of HT Panel

1408

if we have 320KVA Genset kindly advice how much load we can put it.

1481

For 35 HP motor how much amount of capacitor should be on in kvr to reduce the current bill

1 2306

Why transformer used in UPS??

JLL,

1549

The 3 phase Delta connection RB=440V, BY=350V,.......* is Line to Line voltage RY= ? And Formula....?

1668

if there are six generators (3 gas CATT, one Jenbacher o1 MW each, and two nos Diesel 01 no 01 mw other 0.65mw EDGs ( say), 3 CAtt gas set have identical pole pitch,01mw EDG and Jenbacher gas Set have different pole pitch, how their power connection can be done to connect a common bus bar during installation. in short, how different pole pitched generators power connection can be done to connect a common busbar system through generators incomer ACBs.

1558

1hp single phase load = howmuch 3 phase load

1478

1.4 What is meant by CT knee point voltage and how would you determine it

1649

If we need 4c× 50mm sq cable but it's not available so we can pull 4c×25mm sq two cables?

1379

If we need4× 50mm sq cable but it's not available so we can pull 4×25mm sq 2cables

ABC,

1411

i have gear oil pump with single phase motor.some time its motor starts running in reverse direction rather than forward direction...whats the reason behind this issue. 1- either capacitor is week? 2- or winding is week?

1354

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Un-Answered Questions { Electrical Engineering }

in HT service 3ph 4 wire service Y-phase voltage shows zero . whether it is meter fault? or what be the reason ? if y-ph voltage zero ,can current is recorded? reasons for failure?

1878

how did the testing of protection relays done through current injection

2043

what is the purpose of bypass mode in energy lighting transformer?

2455

what is electrical machines

3620

A 3-phase IM is supplied from 50 Hz system. It runs at speed of 1440 rpm and slip equal to 4 %. Calculate number of pole pairs. A 1 B 6 C 2 D 3

1982

We have drive feeding an output contactor for a 5000 hp motor @ 5kV application. The motor FLA is 629amps x 1.25% service factor = 786.25 amps The cable that we current have in place between the drive and the output contactor is 350kcmil- MV-105 (parallel cables). Per the NEC table 310.60 (C) (69). This show the cable ampacity is at 615 amps per cable for a rating of 1230 amps. We have derated the cable for the cable tray and the multiple cables application and our calculations show that after the correction factor factor we are at 922amps. 1230 amps x .75% correction factor factor = 922.5 amps. The customer is driving us to then use another safety factor of .25% off of the already derated cable. Can you please provide a longhand calculation for your solution on this application?

2102

HAI SENT HPCL APTITUDE QUESTION PAPER, MY EMAIL ID IS angus_eee04@rediffmail.com,angus_eee04@yahoo.com

2207

Is it possible to implement Restricted Earth Fault protection for a transformer without neutral CT?

4278

What cmos is and its benefits?

1152

Can i replace Earth leakage relay to the faulty Earth Faulty Relay

1489

I had applied for JE in PSEB, Can you pls send me the Question bank for related to my field

1829

what is the significance of cabability curve of alternator

2188

What is kvar?

1305

what is the criteria for selection of conductor used for ehv ac electrical dischrge

2038

actually i can't understand what is 3dB ? and it's really not clear to me.please any one let it me be cleared.

2211

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