Electrical Engineering Interview Questions
Questions Answers Views Company eMail

why do motors burn out? I understand why adding parallel loads to a power source means more current moves through the circuit, and can destroy circuit elements by overheating. What about when you have a vaccuum cleaner intake flush against a floor, a room fan sitting directly against a wall, or a power drill trying to drill through something too hard?

388

WHAT IS THE DIFFERENCE BETWEEN NUTREL AND EARTHING

Areva,

10 5764

For 300 MW plant what is the distribution voltage

6 4386




in alternator what is use of AVR ? how AVR is operating either AC or DC?

1 2720

in alternator how we can give power to rotor ? its power is AC or DC ?

5 2146

how can u determine size of the conductor by knowing the voltage level

2 2547

why HV test for cables?.why 0.7times?

Bosch, Prince Food Products,

513

What will be the output of t/f supplied with DC sourse?

2 1640




what is IP55,IP65

2 5937

what do u mean by starting torque? how it should be for a good motor? what is the relation between starting torque and power factor? What is the relation between efficiency and starting torque?

2 1577

please explain me about traction application?

2 2803

define differential current and restraining current in relays. how to calculate it by mathematically? post the formulaes.

Siemens, VPEC,

4 20480

why the rating of a transformer in kva not in kw.

9 3758

why cu losses called cu losses.

5 3153

What is the value of nuetral current in star connected load when DC is supplied to it???

1 1421


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Un-Answered Questions { Electrical Engineering }

why output is out of phase in case of common emitter?

577


In TNC switch, is there any 1NO+1NC block ? and if we move over closing position, is ther any affect on trip position or vice versa?

730


Is there any specialised book to refer about fault level calculation both in MV and LV side??

516


what is charger supervision and control supervision?

433


How CFL &T5 tube light glows?

531


what is the safe meggar values for motor, transformer HT, LT and Cables? IF we want to replace I/C bay at our 220 kv substation which is of 140 mw load capacity bay to be replaced by 400 mw capacity bay.other than CT(1200/1) what are the other equipment i have to replace. why we generally use 3.5 core cable or in other word 1/2 core for neutral and also confirm me that in balance conditiob(3 phase)current in neutral will zero

666


what is automatic voltage regulator and it is used?

1544


What is process of anneling transformer core

353


how  do you choose the cable size as per amps rating & the voltage drop for the same.

401


Is there any abbrevation for STUB in Stub bus protection

503


please send 5yearje solved papers on my email himmatsinghnathawat@gmail.com

438


Who are the manufacturer for Nitrogen based Fire Protectio/explosion prevention for Oil Filled Transformers? India and international both?

387


what is the difference between electrical choke and electronic choke?

960


Explain the following and how these are working with PLC Unit 1 I/O Module Card 2 Adaptor Card 3 Ribbon Adaptor 4 I/O bus 5 I/O Devices

172


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

1844