Electrical Engineering Interview Questions, Answers for Freshers and Experienced asked in various Company Job Interviews

Electrical Engineering Interview Questions

Questions Answers Views Company eMail

HRC full from

6 7686

what is the relationship between current&voltage in practical purpose ?

Indorama,

1 4971

Where is 2 phase supply used commercially?

NTPC,

3 8660

why the rating of dc generator is in kw where as rating of alternator is in kva?

3 25194

HOW DISTANCE PROTECTION IS DONE IN EHV TRANSMISSION LINES? WHAT IS THE BASIC TECHNIQ OR FUNDA USED BEHIND THIS ? SPECIALLY EXPLAIN?IMPEDANCE METHOD.

ABB,

2 7217

dear all, in motor operation , motor is of 100 hp and bimetal relay setting is 130 amp, if relay is getting tripped on 120 amp balance current what can be the reason? Relay is newly replaced. I dont know but is there any frequency effect in thit case? Can frequency variation affect bimetal relay operation?

1 3645

how the percentage impedance affect the transformer loading when connected in parallel.?

1 4672

WHEN THESE TRANSFORMERS WINDINS CONFIGURATION ARE USED? SPECIALLY EXPLAIN REGARDING STEP UP AND STEP DOWN KEEPING IN MIND.AND REGARDING LOAD ALSO. a.star to delta b.delta to star c.delta to delta d.star to star ALSO EXPLAIN WHY V USE 415/415 TRANSFORMERS IN TUBEWELLS?

ABB,

1 3924

.if the vector group of two transformers is not same n tey r connected in parallel operation then what will happen?

ABB,

2 6118

PLZ EXPLIN ABOUT CLASS PS CLASS CT .WHY THEY R DESINED AND FOR WHAT PURPOSE?WHY OTHER CT CANT BE USED AS PS CLASS CT? EXPLAIN IN SIMPLE LAUNGAGE IF POSSIBLE PLZ GIVE CIRCIT DIAGRAM?EMAIL-RAJ_SINGH_0376@SIFY.COM

ABB,

2221

what is meant by motor startup supervision & motor load jam protection ?

ABB,

5952

what is meant by trip circuit supervision & directional or non directional over current ?

ABB,

1 5660

What is the minimum distance between taransformer (say 2000 kva)and its earth pit?

Bhel,

2 6087

if the 10 hp motor name plate indicates rated current as 13.6 amp the what will be the thermal relay setting? Why? And in how much time relay will trip at the set value?

2 5712

why we use Bus earth truck and Cable earth truck

5 37898

Post New Electrical Engineering Questions

Un-Answered Questions { Electrical Engineering }

Explain M Var? Which types of problem occurs when reactive power increase at the time of full load of plant and at the time of synchronize of plant?

1741

What is phenomenon of electromagnetic induction and how it works?

1036

I am using submission of two ct in one and half scheme for 67/67N protection. Both CTs star point is grounded separately near ct box.Will two point ground give wrong tripping to 67/67N during fault or no matter.

2064

in general it is observed in power stations, the tertiary winding is used in higher rating Y-Y auto transformer but not in Y-Y power transformer. is the tertiary winding is compulsory then why it is not using in power transformer

1765

Why we cant store an ac power. If we coo store in which device we can?

2134

What are the causes of unbalanced current on 34.5kv feeder Ia=0.05,Ib= 0.25, Ic=0.15 and In=0.27 prior to tripping current are balance?

1700

where reactive power is used

2007

What is the rating of circuit breaker needed for 300 KVA load in 33 KV supply line in a transformer of 33 KV / 415 Volt ?

1742

what are the different kind of cables used for transmissions?

1185

How to do stting of vl250 siemens MCCB

2909

why we use 630mm single core cable for transformer secondary side and why two neutral cable

1806

orifice sizing how done, checking & selection

1900

i have seen one 8.4 MW synchronous motor in a plant located in bellary it is fixed with brushless rotary rectifier ,anybody can explain its start up principle

1937

What is the tube exial fan?

2166

how much GROUND & NEUTRAL VOLT maintain in data center.

2001

For More Un-Answered { Electrical Engineering } Questions Click Here