Electrical Engineering Interview Questions
Questions Answers Views Company eMail

what is ground fault in ACB?

1628

How many earthings are required for motors?

3 12470

What is the function of UV coil ACB?

DLF,

6 43024

if 40 watt bulb has higher resistance then a 100watt bulb then according to joul farmula p=I^2R the 40 watt bulb more power consume then 100 watt bulb.

5 12322

Simultaneous trip of incoming and outgoing breakers of 400kv/220kv trnasformer. What are the probable causes?

2 3773

what is the diff of mcb and mccb

NSN, Sterling Wilson,

2 6538

What does Magnetic Neutral Axis

Eskom, Genus, Lanco,

2 18332

what is mathematical relation between ac to dc current how will convert Iac=50amp to Idc

7 28554

why output is out of phase in case of common emitter?

1632

What is mean by vector group? For what purposes we doing vector group test in transformers?

2 5637

whow we find out dc motor field aur armature resistance

1 3458

how many types erthig

6 6532

How much KVAr bank reqired for 630 KVA transformer on full load for maintain power factor upto.99

Dhanalakshmi Industries, DLF,

4 15659

what are effects of harmonics in the three phase a.c power system ?

AIIMS,

2 4883

What is the difference between expansion joints & thermal expansion joints in Bus bar

1 5852


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Un-Answered Questions { Electrical Engineering }

What is the rating factor for copper cable ( Specific value according to the type of laying ) & the voltage drop?

1383


transformer spections :: input voltage 0-110-230v; output volage 0-10-12-14v; amp=3A using CRNO CORE, capcaity=50VA primary turns = ? ; secondry turns =?

1627


What do you mean by transformation ratio of instrument transformer?

613


Usage of flywheel diode in relays

1431


how we decide wire gauge for ac or dc coil and what is the basic diff. B/w these two coil?

1643






How to test the vector group of a Yd11 transformer? what are the relations to be checked between various vectors to confirm this vector group?

3972


what is the differation bewreen kwh & fundamental kwh in electronic trivector meters

1749


Why it need to form a capcitor when it not been in use from three or two year. Plz describe it technically.

1445


What is core CT & it's function?

1621


Would you recommend to replace all oil filled cables with xlpe cable for hv transmission with the current technolgy for xlpe cable?

1040


which is better to use svc or synchronous condenser why ?

1322


the problem faced on star or delta winding connection??

1462


What are the parameters of water ( Water quality )to be monitored in Centralised HVAC ( water cooler chillers )

1603


Swg formulae

1515


What are two contours of nichols chart?

605