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?

372

WHAT IS THE DIFFERENCE BETWEEN NUTREL AND EARTHING

Areva,

10 5679

For 300 MW plant what is the distribution voltage

6 4337




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

1 2695

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

5 2111

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

2 2488

why HV test for cables?.why 0.7times?

Bosch, Prince Food Products,

499

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

2 1609




what is IP55,IP65

2 5868

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 1561

please explain me about traction application?

2 2762

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

Siemens, VPEC,

4 19958

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

9 3703

why cu losses called cu losses.

5 3107

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

1 1384


Post New Electrical Engineering Questions






Un-Answered Questions { Electrical Engineering }

in dc series motor if field wdg is shorted then

359


HOW WE CAN REDUCE THE CIRCUIT COMPLEX OF STAR-DELTA STARTER .BECAUSE NOW WE USING ONE TIMER RELAY & THREE CONTACTOR FOR MAIN,STAR & DELTA ?IF ANY IDEAS PLZ POST.THANK U

930


What are the functions of temperature scanner in power transformer?

581


what is high - pot test. what's its use?????

367


What is touch potential and step potential?

591


in dc suppy frequency is zero why? if dc frequency is zero how to exist dc transients and ac transients

502


why various test are performed on electrical panels & power cables before commissioning on site & what are these test???

523


why in motors dc extitaedtion is prefer

354


how to design step down 12 V, 1mA small transformer from 220 V AC? Because according to VI relation and power transfer it results bulky...

640


HI SIR, AM PREPARING FOR RRB FOR SECTION ENGINEER POST. PLZ SEND ME THE PREVIOUS QUESTION PAPERS AND HELP ME. I HAVE NO ENOUGH TIME MY EXAM DATE IS 22ND JUNE.... MY EMAIL ID IS nalla.amarnath@gmail.com

367


what is the use of expulsition protective gap in 11Kv line.

475


why we are using in reverse power relay in generator singranizing

603


current transformer balance the power level on both sides. e.g in case of step up, at secondary side voltage rise but current decrease and vice versa in case of step down transformer. but how this power level remains same in case of current transformer and voltage transformer

166


how we can calculate 2 phase welding transformer rating or total power?

299


formula for calculation of switchgears(i.e. contactor, fuse, cb, relay etc.), if load current is given?

501