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Electrical Engineering Interview Questions
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in elevator industries , how to calculate the required KVA for the elevator (elevator spec- 40A module , motor of 13.5KW, 20A)

DLF, Tata Steel Limited,

1 12671

why the stator is not laminated in DC machines?

 4 14926

I am abt to give IOCL intrv.Plz sir guide me for IOCL intrvw (Electrical).Which subject to be consider. questions are generally asked from which subject.Plz help me out.

IOCL,

1555

if we convert kw into kva,which one formula use by us,pls tell me?

ABB, AEC, BGH,

19 23047

if we convert watt into kva,which one formula use by us,pls tell me?

ABB,

16 18686

if we convert Ampers into kva,which one formula use by us,pls tell me?

ABB,

10 11477

if we convert kw into Ampers,which one formula use by us,pls tell me?

ABB, Essar,

9 11528

if we convert kva into Ampers,which one formula use by us,pls tell me?

ABB,

7 9622

if we convert ampers into kw,which one formula use by us,pls tell me?

ABB,

11 16508

How to decide and select the different earthing wire size for the different types of earthing

Suzlon,

1851

What is the safety factor is to be consider while selecting the switchgear and protection for electrical system

 1 3937

Input power is 380 - 450 V but with 45 - 55 Hz frequency - desired output is 415 V and 50hz with 1% variation permissible. CVT / Servo dont stabilize the Frequency - what is best solution??

IOCL,

7 9113

What is transformer saturation?

 1 3089

every motors written in name plate IP 55 what is this?

 2 25798

what is general test conduted by transformer

Wipro,

8 11781

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Un-Answered Questions { Electrical Engineering }

How to calculate KVA/VA rating of PT or CT from primary & secondary voltage or primary & secondary current?

2025

how many electricity poles are there and what are the names and their sizes.

1468

Fantio of tranformer

1791

does any one know where we can purchase insulation oil for high voltage oil filled cables

1901

how maney type tempereture measurement ?

1866




Can Anyone suggest the Standards (IEC or IS) for selecting copper current density?

959

i want use the cable size 16cx4 core aluminium usege watts 240x2000w this cable size is correct?

1819

During regenerative breaking= A rotating magnetic field is reversed B slip is positive C torque is positive D slip is negative

1562

can we start slipring motor on star delta like we start induction motor ? if yes where will we connect ?

1536

when generator short circuit condition, the current how dissipates. or at short circuit voltage not available then current how can flow?

1790

how to changeover ups in this power failur time?

1579

Operation carried out in thermal power stations?

625

What is the dc grounding system and what is diff between AC/DC grounding system?

1667

As per standard, transformer body earthing and other Equipment earthing (Equipment earthing) did not connect. but in LT side termination we are doing metal glanding in both side Transformer to PCC Panel through armoured cable, now X'mer body earthing and PCC Pane earthing (Equipment earthing) both are connect.is this safe for X'mer or other equipment?

1238

what is acceptable leakage current for 33kv cable while doing high voltage test for cable? how to calaulate the leakage current for 33kv or any rated cable?

3515

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