Electrical Engineering Interview Questions
Questions Answers Views Company eMail

What is the difference bet ween EDO Type & MDO type ACBs, and what is the advantage EDO Type over than MDO type ACBs.

Siemens,

2 61781

how brushed dc motor operating ?

1558

how brushless dc motor is operating ?

4 5599

We have a 33/11kv switchyard having 12.5 MVA power transformer. We export & import power through this transformer. When we export power, the PF will be depend on GRID PF & when we import power the PF will be depend on our load PF. but the problem is that,when neither we export nor import but our 33KV vCB is in close position,our meter read the power factor 0.14 to 0.25 at that moment. So how can be we improve the power factor at that moment.

3 5717

what happens if power factor is maintained at 0.9?give me the answer in technicall way rather than telling the penality n all

NCC,

5 9296

what is the use of static frequency converter and static excitation equipment? and where it is employed? for what?

Toshiba,

3153

What is ac and dc drive.

1 6870

What is plc.

2 4552

What is ht lt switchgear.

Bhel, HBL Power Systems,

3 31371

What is lighting kitts.

1756

Why use only DC supply to charge batteries why not AC Supply??

APC, Emerson,

3 6998

can any one suggest paper presentation topies for electrical engg?

1630

1.what is the easiest way to convert AH(ampere hour)to watts?.

2 4592

1.What will be stored in online ups EPROM IC?

IBM,

1734

1.How to calculate backup time from series connected battery of 12v dc with 26Ah for 2battery?

3 9277


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Un-Answered Questions { Electrical Engineering }

What is given by the definition in BIL IMP/PF = 950/395 kV. This was found in a name plate of a power transformer.

1986


what is the min and max ohmic resistance for the earthing rod installed for lighting poles for street light network

3272


HOW TO CALCULATE S/C,O/C,E/F OF ACB.

2275


what is meant by class 1 E in electrical power supply?

1684


Usually in the L & T make MCC feeders' power circuit,we have BMR after the MAIN CONTACTOR.,can we interchange their position, keeping the control logic same???

1758






When calculation of fault current and fault Kva is to be done,why always we use per unit value and why we consider the base kva?

1549


what are the steps involved in generator load test?

1194


why we setting 95 deg and 105 deg in wti and oti of distibution transformer ? give the reson for that ?

2733


What is a diode?

738


What happened if C.T mount at any cable or Bus bar in wrong direction . C.T going on proper work or not . C,T direction is essential thing to properly work.

1398


for 100 HP Induction motor service factor is 1.2(SF) we placed a VFD at the motor side load is balance with 0.3 Amp's Phase to Phase but at incoming of VFD load is un-balance with 10 to 20 Amp's what will be cause of load un balance

1662


What is magneto on a gas generator. how it functions. its out put is d.c or a.c. how it can be checked for correct functioning

1551


What is the instrument to check the rotating diode fuse of alternator in running conditions?

2152


What is inductance?

792


orifice sizing how done, checking & selection

1508