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?

336

WHAT IS THE DIFFERENCE BETWEEN NUTREL AND EARTHING

Areva,

10 5571

For 300 MW plant what is the distribution voltage

6 4273

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

1 2625

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

5 2060

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

2 2426

why HV test for cables?.why 0.7times?

Bosch, Prince Food Products,

476

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

2 1563

what is IP55,IP65

2 5800

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 1488

please explain me about traction application?

2 2709

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

Siemens, VPEC,

4 19053

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

9 3609

why cu losses called cu losses.

5 3027

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

1 1349


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Un-Answered Questions { Electrical Engineering }

we are having 110 Kv,250mA Electrostatic precipitators for coal fired boilers. what will be static voltage and current after discharge and what time it will remain before earthing?

348


What is the difference between a 3 winding and 2 winding Potential Transformer

534


i am gng to visa interview this july i have 4 backlogs gre 1010,toefl 75,pls give me the tips pls pls

447


why a tester wont shock while testing the power in house

142


what is the difference between switchgear and circuit breakers and is there any difference between outdoor and indoor switchgear and circuit breakers , and how would you differentiate between switch yard and substation and grid station . thanks

278


what are the values of VRY,VYB,VBR,Vry,Vyb,Vbr,Vrn,Vyn,Vbn for Magenetic balance test of 100 KVA and 63 KVA Distribution transformer

763


Whether amorphous core transformer is commercialized or not:Name of company making amorphous core transformer and what are different rating?

238


what are the condition that makes hooter blow?

742


what is formula for zero phase sequence of nuetal earthing transformer of 6.6 kv

420


i had aplied Hindustan Petroleum corporation limited for the post of maintenance technician -Electrical,i want model questions,if anybody have please send it or please advice?

449


How to do fabrication , busbar and wiring cost for : 1. LT Panels 2. C& R Panel

326


why steady state stability limit is greater than transient stability limit ? How it can be explained ?

758


Why we use 4-20 mA Analog signal for the PLC input? Why not 0-20 mA? Why not 5-25 mA?

822


Some times to change of DOR of a motor, interchange of R & B is not effected and RYB take same current, but interchange of R&Y is effected ie change the DOR. My doubt is what is the problem in motor and how it is happen.

440


2. What are the parameters of EHT sub-station?

609