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,

2046

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 3209

difference between converter and invertor

2 5381

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

1919

What is the physical significant of power factor?

Cooper,

1884

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

NTPC,

1 3581

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

Orient,

1 4846

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

1 3929

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

IESCO,

1807

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 6408

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

KSEB,

2 6957

In a Capacitor the electric charge is stored in:

TELK Transformers And Electricals Kerala Limited,

2 5232

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

Infosys,

1 5809

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 4529

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 4403

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Un-Answered Questions { Electrical Engineering }

How much ph is maintained of water resistance starter for slipring induction motor ?

2370

-How do you select cable size for a given load at a given distance from source of supply. How do you find voltage drop.

1762

If UG power cable both ends are to be earthed or what? If not why?

1896

low frequency protection why recomend?

2245

Why do we avoid electrical conduits in floors at apartments?

2031

r we are using in gas turbine mark (5) frame (6) (made in india Bhel 1997) Ā

1679

What happens if the series current double?

1438

in my working site. momentary jerck in electrical supply ocurred frequently which cause of multiple losses in our electrical equipements. how can we protect our electrical machines and equipements in this situation.

3424

what should be correct gas pressures to be a 1.5 ac unite

1447

how calculate the electrical load for industry and office

9238

What are the types of instrument transformer?

1130

What is the tipical Online UPS input voltage for 20 KVA load ( 3 Phase or 1 Phase )? Why ? Explain it...?

2604

What happens if i apply 500V to 440V rotary Switch ?

1797

Which type of a.c motor is used in the fan (ceiling fan, exhaust fan, pedestal fan, bracket fan etc) which are find in the houses ?

994

What is the current carrying capacity of 35sq.mm flexible cable?

1425

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