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Electrical Engineering Interview Questions
Questions Answers Views Company eMail

what is the burdon in case of relays?

1 2598

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

RRB,

4 5660

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

Uttam,

5 6644

why permanent magnet generator have higher frequency of 400hz

Jaypee,

3 8245

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 6089

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,

1540

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

1515

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

2 3281

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 2369

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

Electrical Tech, L&T,

2 5362

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

1193

why lightining is not available in swith yards?

1 2494

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

Areva,

1 8196

what is the speed of mixie?

Keltron, TCS,

5 8123

what are the causes for strip heater failure ?

1 2166


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Un-Answered Questions { Electrical Engineering }

how to decide the panel size like MDB ,SMDB PANEL SIZES

6589


What are the advantages of using distance protection schemes as opposed to normal overcurrent/ earth fault protection on high voltage feeders.

2793


can we make a electric generator,which can not use any type of fuel,air,solar,gas,thermal,coal,petrol,etc and able to produce electrical energy (or self electricity generating generator)

1319


in an electronic tri vector meter when the current and voltage sequence changes ? what is the effect of phase sequence on recording of meter

1539


how to calculate the breaking capacity of different breakers.

1522






What is stepper motor?

551


what is the diference between the 4pole & 6pole DC Motors & what is advantage 6pole over the 4pole ?

1243


why we have and use 3 phase not 2 or 4 or other in power system?

1525


do anyone out there know where to find a compleete list on acronyms/abbreviations used in offshore electric engineering. MCB - Micro Circuit Breaker, MCCB-Mouldes Case Circuit Breaker, ELCB-Earth Lekage Circuit Breaker, ELMCB- etc.....

1353


My load is 1635 KW. & current pf is 0.884, I have to improve it for 0.99.Please suggest what KVAR value is needed?

974


Is it possible to protect 3phase overload and earth fault of the 3phase system using two CT's.

1398


How to Prepare preventive maintenance shedule of machine tool.

1326


state working of halogen lamp?

1188


what is the use of Auto re-closer?

1460


A system absorbs 100 k J of heat and the increase in its internal energy is 100 kJ; the work done is

542