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Electrical Engineering Interview Questions
Questions Answers Views Company eMail

Please explain open transition and closed transistion system in Star delta Starter?and also the state difference of both?

 4 10975

what is the question paper model for section engineer in RRB

RRB,

774

Can a 5 core cable one end with a 32A 3p+N+E plug and the other end 32A 3p+E be used on a generator?

 1 2123



What is the use of Isolation Transformer, and Neutral is using for return path, finally this current is going.... but same time the voltage of the neutral should be below 1 V...

 6 8004

Dear All, Pls let me know about ELR.... CBCT is using for singnal purpose... How it works.. any body can explain pls.......

 4 11206

What do you mean by linear and bilateral network?

OPTCL, Infosys, Disa, TICT, Automation, EGCB,

20 125785

if the HR asked to me., you have got 92% in higher secondary but got only 72% in engg whats the reason??what should i have to say ..please help me..

Honeywell, Wipro,

8 6553

why making capacity is more than breaking capacity?

Essar, Indo Asian, Infinity,

14 21616



what is inrush current in transformer?

Bhel, Essar, GMR,

17 30427

what is electric current

 17 7341

what is the capital of india

eInfochips, Reliance,

13 9807

what is surge suppressor?

Essar,

5 5086

how to write program by ladder logic in case of PLC operation

Gridco, Sofcon,

3 14647

how power saving takes place through VFD?

 9 10286

If i want to build 230kv substation what are the equipments to be installed?

 7 10848

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Un-Answered Questions { Electrical Engineering }

How will polarity test of Dy5 Transformer ?

862

For 160kw motor what size of cable and material is needed.?

275

in ACB breaker requireding 3200Amps. buscoupler getting OFF mode and again it reset and getting normal position give me a required answer?

973

I just purchased a 4 position cam switch to be used to operate a 3-speed blower motor. The motor is a 10 amp motor and has 3 wires that are used to control speed. The cam switch was rated at 660V 20 amps but when I received it, I noticed that it has AC-15 operational current rating (Ie) of 4/5 amps. If I am reading the label correctly. the 4/5 amps is related to 440v/220V (Ue). Other ratings are AC-3: 5.5A, AC2: 7.5A and AC-4: 1.5A. My questions are 1) Is it safe to use this switch with the motor I have 2) what is the difference between the 20 amp Ith ratting and the Ie operational ratings?

456

How two nos. 130 kw D.C motor get synchronise using D.C drive.

701




1.What is the range of stator resistance of 3-phase induction motor? 2.Two electrically operated vibro motors are foxed in parallel direction in vibrating feeders. what is the direction of both vibro motors?

696

what is parellel power factor correction?

2045

how to test the electrical panel.ht lt mcc pcc.

1676

What is mean by STUB protection?

749

how i chosse capacitor bank if my energy meter is 48 kvr? tell me capacitor bank chossen formula?

1148

What is mean by spike arrester(Voltage Operated)

819

How o select the electrical fuse?.What are its characteristics.How to select the material od fuse?

722

Comparision of Air break circuit breaker, SF6 Circuit breaker and vacuum circuit breaker.

1149

WHAT IS MEANT BY INSULATION CLEARANCE IN VACCUM?

736

Why using synchronising methed in DG's sets?

953

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