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Electrical Engineering Interview Questions
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How can one connect three source of electricity in a house..the source are 2 gen and one electricity.

SAUDI ARABIAN BAYTUR, Wantro Technical Services,

2 5344

Why we use Fuse in transformer in secondary side.Why we dont use fuse in primary side?

Care,

1 3896

how can i change the rotation of the AC single phase induction motor and show me by diagram

 1438

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 

 1426

how  do you choose the cable size as per amps rating & the voltage drop for the same.

C&W,

1433

Could the power factor on electrical system can affect the registration of the kwhr meter or the CT/PT? 

 1569

how to calculate the phase diffrence beetween given two equetion  y= 15sin(wt+pi/3) and y=10sin(wt-pi/4)

 1 2600

how the speed decreases of a generator in power station if load increases

Tata Power,

1 4219

Why consider motor rpm to select capacitor for motor

KSEB,

1 2936

How many percent of power are not being registered if we bypass one side of the meter base terminal using #8 cu wire on 1-phase kwhr meter. 

 1 2128

in dc shunt motor if field winding is shorted then

 1478

in dc series motor if field wdg is shorted then

 1521

in dc shunt motor if armature wdg is open then

 1 2385

10rm cable can got load ---- amp? Or Which Size Cable can take the load 100amp capacity SCR; breaker.

B-Con Trade Associates,

1 2791

3ph line voltage 220v, how can run a 220v single ph motor or Light?

 2 2884

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Un-Answered Questions { Electrical Engineering }

Cb closed condition if there is a tcs fail whether cb will trip or not

1422

i need to now what will be the cable size to the following load, transformer to distribution panel distance 110m, load 1000kw, voltage 400v, pf 0.85, permissible voltage drop 2.0%, overhead line, atmospheric temperature 35 degree c.

1284

What is the difference between solid grounding and impedance grounding?

1651

what is the excess air in furnace

1690

Can we convert off line transformer to on line transformer

1603




Explain the working principle of Synchronous Generator and Assynchronous generator?

1860

i want to know that what is the eligibility critaria for ongc exam?

2669

How it can worked plc based electrical system And which type of software using.

1789

What is time response of the control system?

741

in my industry we are using 3 step up transformers for induction heaters..i.e 415/580v and other are 11/440v.in power consumption does a step trnsformer makes any difference compared to step up?? plz explain

1536

I Have 3 Phase 10 KW AC Alternator i found one phase weak, so what will be the reason & what action shouls i take to rectify the same.

1675

why we used dc supply for field in dg set

2045

What are the advantages of stationary armature and rotating field system?

811

we have two generators different capacity on 15 MW and other 6MW at 11 KV , 15 MW gen. bus short level current 40KA,and 6MW short level current 25KA,, length of cable 100MTR between 6 MW from 15MW gen. for bus coupling . kindly tell any one can we use both NGR OR one NGR from any GEN. BOTH NGR has diff. rating. Tariq pakistan

1333

What are protections for dty type transformers

1480

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