Electrical Engineering Interview Questions
Questions Answers Views Company eMail

Basic motor transformer generator

eCentric Solutions,

248

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

219

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

255




what is difference between KW and KVA

294

how to select rating of HT Panel

261

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

279

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

1 380

Why transformer used in UPS??

JLL,

315




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

288

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.

317

1hp single phase load = howmuch 3 phase load

256

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

293

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

197

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

ABC,

185

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?

168


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Un-Answered Questions { Electrical Engineering }

what is a pilot wiring and whys that called a pilot wiers

672


what is the reason for indication of light in the earth lamps of main switchboard.if there is an earth why does one lamp get dim and the other two bright.

1119


Whether IP65 enclosure box blocks ventilation if driver for LED have to enclosed inside IP65 box

947


what is size of 3phase 4wire cable to be used for 11 ton ductable A.C and how to calculate cable size for different load

1892


What is different bewteen low or high impedance busbar protection scheme

3000






What is the Designing & Selection Procedure for a DG/Transormer of rated capacity?

1062


3Cx240 & 3Cx300 sqmm Al. cable from lv side. What is the calculation for this cable??

181


Explain with example of functional requirements of protection relay in terms reliability, selectivity, sensitivity

645


WHAT IS THE USE OF PIG TAIL IN WINDOW CT ?

1087


Explain about Leakage Test.

760


if an insulated power and control cables of a running gas diesel gensets laid direct in an open trench i.e, trench bed is not rcc of a power house in which rain water, spillage water alwas exists and all power control cables remains submerged even when gas gensets of 480 kw each runningin on load. These power &control cables runs from power house to switchgear room through these trenches in which water remains most of the time. pl explain its merit & de-merit

826


I want to merge a cable..in between two metering Cubicals which contains CT's and PT's and Energy meter..before taking merger..what are the common things required?

501


show the single line diagram of star delta starter with single phase preventer

3051


what is the function of anti pumping relays? what is KVAR? How it is generated in alternator? What is 3rd Harmonics? What is IDMT relay?

1178


while doing high potential for 11KV 3 core cable how much leakage current will obtain?, what will be acceptance value?

1754