Electrical Engineering Interview Questions
Questions Answers Views Company eMail

what is rotating transformer? what is the uses of it?i mean applicaitons?

First Lead,

5 27486

What is the purpose of SSVW, IOVW, DVDF Tests in transformer? Those who are answering, pls send mail ids also.

1 10679

How Arc Extinguish in Minimum oil circuit breaker and What is the function of Radial and axial vents of turbulator in Minimum oil circuit Breaker Where these vents are exists.

1 3684

How Arc Produced in Circuit Breaker When the contacts of the circuit breaker open.

1 5335

how i decrease the neutral to ground voltage , thats i read 7v on my digital meter.i dont know about my earth pit.

2 3617

why we are using the 2 slope in differential relay?but in busbar differential we are using only one slope. what is the reason.

1 3094

in the directional overcurrent and earthfault protection,normally we are setting the angle 45 deg lead for phase fault overcurrent and -45 deg lead for earthfault fro forward direction.but both the fault are operating on the same angle region only.why?how the relay will response?

1406

can you show me the components inside a air circuit breaker with connection diagram?

1 3388

How the oil level of the Buchholz Relay come down.

3 6657

why CT ratio stand for 50/5, 100/5, 25/5.

ABB, Ramky,

11 63592

How phase displacement change in the over current relay coils.

1852

why CT output is always raetd 5.regardsof primery curre.

ABB, BARC,

3 6015

what happens if number of poles in stator and rotor windins of slip ring induction motor are not same. Will it rotate near to the synchronus speed defined by stator?

GATE,

1 3896

If the rotor pf of a 3 phase induction motor is .866, then what is the phase displacement between stator and rotor magnetic field 1)30,2)120,3)150,4)90 please justify....

GATE,

2 4779

what are the methods of speed control of dc motor???

4 6819


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Un-Answered Questions { Electrical Engineering }

If we have to feed a housing complex having load 8MVA, than what would be the better option, either we first step down 33kv supply into 11kv & than 430v or we proposed no of 33/.44 kv transformer, also which option is economical?

1685


please write motor, transformer, Generator setting, fault level calculation of Tr.etc

1516


Can the output voltage of a rectifier be greater than the input AC voltage without the use of any voltage multiplier in the circuit??please provide the explanation too..

1641


from which subjects most of the technical que will b asked for hpcl(electrical).pls help me

1567


difference bewteen reverse current and alternating current

1683






what is difference between earthingpits,earthing grid & earthing mess?

2052


Safety of on line ups

1484


What is steady state response?

670


why would amp draw on neutral wire be as much as amp draw on the hot leg.

1639


In an ACB shunt trip coil and undervoltage coil operated normally( breaker open and charged). But closing coil not operating untill manually discharge and recharging. Any help.

1281


Anybody know how schematic diagram for reverse power relay? RPR for generator protection

1659


I have c license but I don't know eligibility of Max Kilo Volts under the electrical licensing board.

1209


what is mean by restructuring power system?

1539


What is the limitation of kirchoffs law?

644


in wind mill use 2100 kw asychronous generator ( induction generator ) rotor voltage : 3300,stator voltage : 690, rpm : 1511 type : MRL063E04 ' we check rotor resistance magger value found following. R-EARTH - 00 M.OHM,Y-EARTH-34 M.OHM,B-EARTH- 33M.OHM R-Y: 31 M.OHM, Y-B: 00 M.OHM,B-R :33 M.OHM HOW CAN I TAKE DECISION?pls ans. quickly

1874