Electrical Engineering Interview Questions
Questions Answers Views Company eMail

can we synchronize star system generators with delta system generators?

1466

can we synchronize star system generators with delta system transmission line ? and how ?

2319

Can we convert off line transformer to on line transformer

NHPC,

1482

Can we convert off load tap changer transformer to on load tap changer transformer

2 5715

why two fuses are used in battery charging room?one in positive line and the other in negative line?do any DC system require two fuses?

HPCL,

1 3794

how many test is necessary for 27mva transformer.

HEG,

3 5782

Why we use series reactor in power system?

Cadbury, HEG, Uttam,

9 20989

How u can give the overload setting to any motor protection relay for a HT motors with formula and Example?

OCL,

1661

What is differential relay? How it operates?

1 4441

. How to calculate the Short Circuit Impedance in Transformer? How to calculate the Short Circuit Impedance in Transformer?

1634

What is the alternate solution for testing of polarity by using polarity tester while its milli ammeter does not works?

1526

While testing the 33KV Busbar by using Hipot kit, what should be the test voltage we have to apply

2 7675

What is the procedure/activities to be taken to inject the current more than 2000A by using 2000A Loading Transformer?

1569

Explain how you can give the overload setting to any Motor Protection Relay for a HT motors with formula and example?

1658

Why restricted earth fault protection is needed? Why can’t differential Protection is sufficient?

1 3538


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Un-Answered Questions { Electrical Engineering }

what is kondo syatem in eletrical traction

1674


What is center gravity load in substation?

1953


How to select batteries required for ups and the inverter if we Known load? And how AH is selected of battery?

897


why we get 2 differnet values for power factor in 2 watt meter method in 3 phase

1377


Why High voltage are generate noise ?

964






How test for Ddo vector group test condition?

1975


In Air circuit breaker LSIG protection unit is used. Without fault in cables (2 runs 3Cx150Sq.mm Copper, 1Kv grade, XPLE armored cable IR value is more than 550Mohm @ 500V Megger) and load section Long time Overcurrent protection is triggers and trips the unit. We changed LSIG protection with new factory tested unit. Even then fault is persisting. Please suggest the possible causes

364


How to reduce the static electricity producing in solvent room? By P.D.Patil BioCon

1591


WHY EXCITER PHASE SEQUENCE ARE OPPOSITE THAN STATOR SUPPLY PHASE SEQUENCE IN SYNCHRONOUS MOTOR >

1452


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

3028


On Which Pressure PRV is operated.

1283


how to design coil turns ?

1544


what is the breaking capacity and making capacity of circuit breaker and how

1599


why three phase capacitor takes unbalanced current in capacitor bank?

1021


How to apply 'c' license and also explain what is difference between 'c' and 'b'license.i am also working in one of the private company.i have finished my diploma in 2014 .i have already finished in ITI electrician course.....

1575