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

Electrical Engineering Interview Questions

Questions Answers Views Company eMail

wath is skin effect?

9 12064

How many earthing pits required for diesel generator set ? Why ?

1 8540

what is the fuction of electrical transducer in control pannel?

6 8167

which is batter in construction job,ELCB or RCCB?

HCC,

7 18522

whate is aelectrical power fector for exampal

8 12499

We have 800KW motor operating at 6600Volt,50 Hz supply.During 1st startup it tripped on overcurrent trip.It's FLA is 88 Amps.The K factor of Thermal overloaaad was set on .94 initially.then we set at 0.97 and then it started fine.i dont understand why it tripped first?What are the protections which comes in picture during starting ?

6 9779

HOW MANY EARTHINGS REQUIRED FOR GENERATER

Juniper Networks,

10 18965

what happen when dc shunt motor field is sudden open in running condition

APGenco, Bhel, IIT, JMRC, TCS,

34 79830

if the magnetic lines can pass through a vaccuum area

1887

What Is Transformer Impedance ?

Con Edison,

6 16499

How conventional fire alarm system works?

1 2714

WHAT IS SHORT CIRCUIT STRENGTH OF 100 AMPS MCCB?

ACC,

2117

how to choose the cable rating for load (KW)? EXAMPLE.50KW load

ACC, NCUI, Polycab, PowerSol, Siemens, SW,

14 172848

whats the diff b/w mpcb and mcb?weather it trips on single phasing or not.

Electra Power, Essar,

9 17799

what are the safety measure & controls in engine?

RRB,

2 6957

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Un-Answered Questions { Electrical Engineering }

Why to keep capacitor bank off while generator running.

1800

Explain bypass capacitor?

1164

In the ACB breaker capacity is 2000Amp but this each phase taken 1250 But total beldibg load is 600amp or 700amp watt is the problem

1964

if sf6 gas low in gis what will happen

825

When we use 3 terminal resistor?

1246

oltc of a transformer, how it works? and what are the equipment consist of describe briefly?

2025

We have given to 3phase supply to ups system & how can coming netural

2151

Help need in transformer !? Hello Friends The parameters of 2300/230 v 50hz t/f is R1=0.286 ohm R`2=0.319 ohm Rc=240 ohm X1=0.73 ohm X`2=0.73 ohm Xm=49.2 ohm Secondary Load impedance ZL=0.387+J0.29 solve the exact equivalent circuit with normal voltage across primery.. I know every thing but i cant find CURRENT I1=? and I`2=? Please help me give solution or only Formula please please...

3108

What is the Good Earth resistance value of G.I & Cu. Chemical Earthing & Normal Pipe Earthing?

2342

what is the difference between transformer,converter and transducer

1671

Can you tell me more about pu systems (per unit systems )calculation in large power systems? how to get the base for voltage and power in generator, transformator and transmission lines?

2292

how ct burden,magnetising current,ratio and knee point voltage are related & derived

2196

Air refrigeration cycle works on the

1099

1.why are not using acb 33kv ht side? is there any problem 2.what is difference between acb,vcb,sf6 breackers? 3.what is the function of invertor and convertor in ups?

2144

In layman terms, what is the difference of Dielectric strength and dielectric constant when speaking of an insulating oil

2706

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