Electrical Engineering Interview Questions
Questions Answers Views Company eMail

difference between ac motor and dc motor

5 15532

why aggregate is placed all around substation ground.

9 8709

whats is MARX CIRCUIT?

1 7711




What are the earth resistance Standards of 66kv sub stations according to indian norms.

2 1930

what will happen when a bulb s connected btwn two phases of a three phase delta connected source?

6 5139

why ac supply neutral should earth not in dc (-)

2 4207

Which Kind of machines(in terms of poles) give the smoothest DC

756

Which type of gas used in cylinder (VCB)?????

ICSA,

15 10900




If I want to use capacitor banks at HT (11 KV) side for maintaining power factor then which type of capacitor should I use? Plz give me the specification?? (I am using 1250 Kva transformer (11 KV/433V)).

2 7760

how to calculate lux level in out door (yard lighting) please expalin with a example

IVRCL,

1 3608

What is the major difference between cnc and plc. why cant we use plc instead of cnc

5 28745

What is difference between ball screw and lead screw.

2 7050

selection of conductor in different voltage?

TATA,

1 1643

What is the most accurate way of testing ELCB?ELCB is better than RCD?

GECO,

2037

what is MFD value in capacitor?I have 201 Kva load & reactive power is 150 Kvar. so how it is calculated?

IIT,

2 6463


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Un-Answered Questions { Electrical Engineering }

full form of flry b

1926


How may I enrol or get admission to your program?

780


hello everybody. what does an abnormal stator winding impedance or dc resistance show? thanx

721


In electrical locomotive engines, the DC series motors is being used as traction motor. But in new engines like in WAP7 & WAG9 the 3-phase squiral cage induction motors has replaced them. So can someone tell me the advantages of induction motor over dc seris motor in engines points of view....???

1185


why and how voltage sharing in transformer, during magnetic balance test ?

973






hi plz send me reliance placement papers..i.e electrical technical papers that have been asked in reliance test.

1689


Whether amorphous core transformer is available in India?.If available then up to what rating of voltage and KVA?.

494


Transformer cores are laminated in order to A simplify its construction B minimize eddy current loss C reduce cost D reduce hysterisis loss

1866


Earth is a conductor or load?then ammeter connect to 3- phase supply,it shows the measurents or not?

898


what is transient stability analysis means?

786


What is the need of earthing transformer for delta side of a transformer. (Think of a line section between a star/delta transformer at a grid substation and delta/star transformer at a village. An earthing transformer is there at the delta side of the star/delta transformer at grid substation). As there are no ground reference there will not be fault current if a one phase is grounded. Further L-L phase will be sensed by the primary side of star/delta transformer as a L-G fault. So why an earthing transformer is required at delta side

162


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?

567


i am an maintenance engineer. one distribution board have 5 feeder. recently its ELR trips frequently, but it take some times after trip( 10min,20min..)but 3 feeder no load. two feeder only loaded. i checked one feeder IR value all values are above 50Mohm.but B phase to Earth is only 9Mohm.any problem about low value

567


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

911


I am having a 42KW 3 phase electrical heating furnace, heating element is 80/20 nichrome material, my connections is made in such a way that 2 star connection compromising 2 coils per phase so totally 12 coils, shall if i use it unbalanced star condition (instead of 2 group of 3 phase or 1 group of 3 phase, connecting 4 phases of 5 phases) what will be the consequences and is it acceptable?

471