Electrical Engineering Interview Questions
Questions Answers Views Company eMail

what is the burdon in case of relays?

1 3177

Why we use less dia. fuse and conductors at H.T. side, although we use higher dia. cables on L.t. side?

RRB,

4 6777

what is the formula to find Amp. for an 3 phase moter both if H.P. or if kW is known?

Uttam,

5 7952

why permanent magnet generator have higher frequency of 400hz

Jaypee,

3 9110

a 650 KVA diesel generator is 1500 rpm, voltage is 415V n full load amps is 805 something,when are applied load more than 400 amps it's voltage is dropping, what is the reasons...?

4 7140

A TRANSFORMER 440/400V,DELTA/STAR CONNECTED.THE NEUTRAL CONNECTED WITH GROUND CABLE THAT IS DIRECTLY CONNECTED TO THE PANEL,FROM PANEL IT IS CONNECTED EARTH PIT.IS IT RIGHT? IF IT IS RIGHT LEAKAGE CURRENT AFFECTED.SECONDATY IS PROTECTED WITH EARTH LEAKAGE RELAY.

Jindal,

1812

what is difference between window type and wound type transformers?where we will use window type and wound type transformers?

1842

How can transformer oil be used in transformers with voltage rating above its breakdown voltage?

2 3799

why we still use sinusoidal waveforms for transmission and utilisation (we know generation is sinusoidal), instead of other ac waveforms such as triangle, sawtooth, square etc.,? is there any mathematical derivations to prove sinusoidal is efficient than others?

1 2790

how to calculate busbar capacity for 1000Kva transformer having22/.433V

Electrical Tech, L&T,

2 6249

what is effect of 5amp fuse on 2mva pry protection of transformer

1501

why lightining is not available in swith yards?

1 2997

How to test and satisfy the conditions of the vector group YNd1 for power transformer?

Areva,

1 8686

what is the speed of mixie?

Keltron, TCS,

5 9233

what are the causes for strip heater failure ?

1 2847


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Un-Answered Questions { Electrical Engineering }

static chagre

1816


For overhead protection we use which transformer?

2069


why the difference arise between HT reading & LT reading (submeters fixed in complexes, apartments etc)if the power factos exceed from 0.9 to 1 can the ht meter reads fast?

2384


what is the mechanism of operation of brushless dc motor why is it more wexpensive then ordinary permanent magnet motors

1641


PLEASE INFORM ABOUT THE IDEAL TEST RESULTS OF MAGNETIC BALANCE TEST OF TRANSFORMER 33/11 kv DELTA-STAR T/F

1896






Its possible to use 3core 2R of 240 sq.mm cable for 3phases & separely 50sq.mm 3core cable fully for Neutral for connection of PCC to MCC 3ph..4wire system?

1825


What is kirchoff ’s current law (kcl)?

757


What is the tube exial fan?

1824


What is limitedly stable system?

787


Why are iron cores in transformers made laminated?

796


Write the current equation in series RLC circuits.

763


What is transmittance?

761


Is it possible to make a 5P10/ CT Ratio 50/1A Burden 5VA

1391


in parallel operation of power transformer why the distance between power transformer and capacitor bank feeder is necessary to know

1465


if you are in a software company,then why do you want to come in a core company like sail, ntpc(where lots of trouble like tension but you have a good life in a it company) ?

1567