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

Electrical Engineering Interview Questions

Questions Answers Views Company eMail

Why we use ups battery and dsdb battery in thermal power plant

MDeC,

2043

I had finished D.E.E.E at 2004,I wish to take C license.I am working pvt company HT supply but my professional certificate was missing.I have diploma & course completed certificate.without professinel may I got c license?.pls guide me.

OEG,

1 3202

difference between converter and invertor

2 5370

Can I use star delta connected induction motor for dual supply voltage?

1917

What is the physical significant of power factor?

Cooper,

1882

what is the significant for using two types of voltage(line voltage & phase voltage)

NTPC,

1 3579

How to calculate the cross section area for a 350 m cable, motor power is 26 kw???

Orient,

1 4841

what happens when a dc shunt motor fed with an alternating suppy ?

1 3921

What is the formula to calculate distribution transformer De-rating on iron losses basis

IESCO,

1805

Dear All, Can anybody please tell me which value(saturated or unsaturated) of sub-transient reactance(Xd") we take for the calculation of fault current of the system?

2 6389

Petroleum jelly is applied to the terminals of the lead acid battery is to prevent?

KSEB,

2 6950

In a Capacitor the electric charge is stored in:

TELK Transformers And Electricals Kerala Limited,

2 5230

Rated moter voltage and frequency is 380volt 60 hz but moter is running at 380votac 50hz is this harmful for moter winding

Infosys,

1 5804

what happen if the battery is charged by more than one source ,for ex: connecting data cable to laptop & charger pin to source supply ?

2 4521

When testing an earthing connection, we use a 60 or 100 candle bulb with a phase connected direct from supply and the other wire to the new earthing provided.If the bulb glows then the earth is ok.Else earth connection is not Ok. So, why dont we can use all the home appliances taking a single wire from the phase and the return connection to Earth instead of return connection to neutral?

2 4394

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Un-Answered Questions { Electrical Engineering }

What is the name of the winding to which supply is given?

1133

how do i work out the Amps of a incommer if i am running 1 37 KW motor and a 0,75 KW motor and some solinoids

1859

Define bibo stability.

1031

what are the applications of TIG welding

1620

WHaT IS THE CONCEPT OF INDUCTION LAMPS IN MODERN LIGHTINGS, and HOW IT WORKS TO EMIT LIGHT ( AS NO ELECTRODES ARE PRESENT ) ?" COULD INDUCTION LAMPS CAUSE INTERFERENCE WITH COMUNICATIONS INTO A STORE USING INDUCTION LIGHTING ? WHAT IS THE BENEFIT OF USING THE LOW FREQENCY INDUCTION LAMP , VERSUS LED , AND VERSUS FLUORESCENT, AND VERSUS ANOTHER KIND OF LIGHTING . THANK yOU MOISES GUINDI

2042

how is working bearing heater?

1940

what is mean by restructuring power system?

2017

What is inrush current? how can calculateit? what is the affect of it?

1958

how to find 5 kilo meter long under ground 33 kv cable fault location if IR VALUE shows 0.05 M ohm @5000 volt.and cable fault locator shows some time fault distance 3 kilo meter ,3.7 kilo meter and some time 1 kilo meter? now how to find the fault location that where is leakage. note--it is tested with 5000 kv megger and insulation resistance is 0.05 M ohm. and some time 0.03 M ohm comes.

2166

What is the disadvantage in proportional controller?

1109

working principles of cf lamp,incandescentlamp and f lamp?

2219

what is servo motor and how to work it.

1871

i want to model paper for section engg.

1974

when measure the core loss of three phase distribution transformer or three phase reactor loss, one phase shown negative watt loss. why??

1941

Why power factor should not be in leading (capacitive) mode of any load.

6880

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