Electrical Engineering Interview Questions

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?

408

WHAT IS THE DIFFERENCE BETWEEN NUTREL AND EARTHING

5873

For 300 MW plant what is the distribution voltage

4465

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

2752

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

2175

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

2612

why HV test for cables?.why 0.7times?

544

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

1679

what is IP55,IP65

5992

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?

1587

2846

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

20933

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

3811

why cu losses called cu losses.

3194

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

1459

Un-Answered Questions { Electrical Engineering }

In 11/0.414 KV Parralel supply network with Bus tie closed what will be the fault level is it doubled or halved??

370

5.WHICH TYPE WELDING PROCESSES USES NON CONSUMABLE ELECTRODE.........

662

How to work definite,over pluxing,revers power,OSR relay

100

How phase to phase voltage comes 440V.

430

what is the difference between online & offline caliberation of KWH meters. Can Digital meters be caliberated

466

why we need to us lenz's law for synchornous motor

803

WHAT IS SITTING AMPS IN OVER-LOAD RELAY FOR 1PH OR 3PH MOTORS?IF ITS NAME PLATE GIVEN MAX AMPS 10AMPS?

339

What must be the minimum distance maintained between 2 Generators as per International standards?

416

How to confirm the Phase shifting Transformer VECTOR GROUP relation , as below ZNy11.45d10.45-ZNYy0.15d11.15

1044

at work i have a genertor/alternater what is the easyest way to work out if it is dc or ac?

356

Parts of machine and their discription in details with suitable photo

538

1)how to reduce the value of tan delta of trasformer and CB,bushing,CT&PT,CVT ? 2)how to reduce the resistance of CB contact and its operating time? 3)plz.....send me the project report on conditioning and monitoring of substation equipment on my email id (gusaiyogendra03@gmail.com)

613

what sort of general awareness questions are asked in o.n.g.c entrance exam?????????????????

3220

how can i find cable size from current rating?

181

can any one provide me a connection wiring diagram for a DG set control panel along with BOM?

687