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,

2094

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 3280

difference between converter and invertor

2 5472

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

1954

What is the physical significant of power factor?

Cooper,

1927

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

NTPC,

1 3653

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

Orient,

1 4913

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

1 4002

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

IESCO,

1853

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 6531

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

KSEB,

2 7058

In a Capacitor the electric charge is stored in:

TELK Transformers And Electricals Kerala Limited,

2 5337

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

Infosys,

1 5898

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 4640

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 4506

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Un-Answered Questions { Electrical Engineering }

Why do we need interlocking in a HT metering or Ring main unit switchgear?

2031

How to do cable earhing? whether by grounding Armour to ground or by running extra G.I wire along with cable? which one is preferred mostly amoung them? If the second one is more preferable how many GI wires to be run along with cable (1 or 2)?

2142

please send me previose rrb junior engineer qustion papers

2156

How to decide the size of the capacitor for a single phase induction motor say 2 HP ??

2240

DESCRIBEPNEUMATIC SYSTM OF ASH HANDLING PLANT

5539

Hello everyone, somebody knows what is a "surplice power" ? The hole phrase is: "This rating is appropriate for a generator set paralleled with an infinite bus e.g. a national electrical supply network or grid where the generator set is run at 100% load, 24 hours a day, 365 days a year and any surplice power is exported into the grid" Thanks in advance.

1786

single phase power supply give to separate one steel coup with water, what reaction create

2092

What is the meaning of loop in transformer

1804

how to interlock 3 incomer-ACB,1 buscoupler ACB,... pls answer this question and if possible send me the ckt diagram..haifriends2910@gmail.com

2921

What is the permissable nutral current of three phase system as per IS standards?

2118

What is electrical cable termination

2633

If o/p power is doubled by how much does the sound increase

1096

What is the end effect of linear induction motor ??

2031

How the over load setting for HT Motors calculated-provided in Numerical Relay

1822

why high speed tripping relay will be used in tripping circuit why not normal relay

1371

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