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

Electrical Engineering Interview Questions

Questions Answers Views Company eMail

what is the difference between RCCB and ELCB?

3 7396

What is difference between PLC and SCADA

Uflex, Vimal Fire Controls,

13 69804

What will happen if i connect two 3-phase tranformers secondary supply on one bus bar that is R-Y-B-N?

GMR,

2 4626

WHY IN THREE PHASE CABLE 440V CURRENT FLOWS IF IN ONE PHASE 230V CURRENT FLOWS ???

3 8816

How Can we calculate current carrieng capacity of Copper Bus-Bars and Alluminium Bus-bar

2 7776

difference between load bus and dead bus?

4 30795

Why only sinusoidal ac voltages are generated?why not triangular or sawtooth?

2048

what is FACTS & where i can material regarding to facts.

2 4970

how to mention 5mw generator in kva ? gen voltage is 11kv

6 10229

what is meant by reactive power ,active power & real power ? thank you

2 6105

What is difference between Dy11 & Dyn11 vector group transformer. Can both these transformers operate in parrallel.

Jaypee, JOY,

5 64388

why we are using auto transformer in sub station mostly???

2 11800

what is the relation between KVAR,KVA,KW?why we are mentioning capcitor rating in kvar?what is meant by arcing horn and horn gap in transformer?what is equipotential wire?

1 6781

What is the method to calculate the capacitor bank rating for say 50 KW load and how do we connect each capacitor to busbar??

4 13270

In our factory so many iron pillors are exists for supporting the shed/Hangar. If do more no of earthings at one piller instead of doing more earth pits in many locations and running earth strip around the hanger, I can save the money. Please suggest this method is acceptable as per Is specifications though the Earth resitance of the farthest piller is with in the limits as per IS specifications.

HAL,

2073

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Un-Answered Questions { Electrical Engineering }

what is the effect of un-synchronized power.

2004

what is the safety points of vaccum circuit breaker.

2037

I have a small system with two motors that are running on 380 vac, 60 hz. These motors are expensive and I usally get them from Brazil. I am adding another motor to the system, but I want to purchase a 480 vac, 60 hz motor to use. It will be on a VFD that is rated fro 380 thru 480. Is this posible and will I have to use a larger motor and derate it?

1922

What is the basic principle of welding process?

2100

how can we change the phase angle b/w two phase?

5075

Why an ac systems are preferred over dc systems?

1061

what is the pulse and audio frequency transformer? what is different between induction regulators and tap changing transformer?

2071

How to Decide(calculate) Bush bar size for copper and aluminiam ?

2094

What is the most accurate way of testing ELCB?ELCB is better than RCD?

3295

what is the difference between an alternator and a synchronous motor

1979

how we can adjust for three phase motor cold stall time ,hot stall time and thermal register set up?

2846

what is the transiant condition in alternator? and how it can be prevanted?

2049

what is the best transformer oil breakdown voltage?

1094

How can calculate the rating of a alternator for a given specific load with formula

2294

what is the need to express current and voltage in rms value? rms value is also called as effective value,what is effective value?

1921

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