Electrical Engineering Interview Questions
Questions Answers Views Company eMail

What is the value of 3 phase voltage?

RECPDCL,

7 3194

why do we need a 4th wire in 3phase 3wire transmission line

6 3581

What are the limiting factor for controlling maximum hot point temperature within a hydrogen and water cooled generator?

1 1322

resistance of transformer oil=?

HCL,

1 1448

What shall be minimum thickness of firewall in between two transformers and which code specifies it ?

1 10651

Three phase star connected PT transformer primary side one phase fuse is blown what will be the output in secondary side(Secondary side also three phase star connected)

1 1080

Three phase star connected PT transformer primary side one phase fuse is blown what will be the output in secondary side(Secondary side also three phase star connected)

Sun Pharma,

2 3525

what is the internal working of star delta starter

609

in a plug point why the hole size at the top is large?

TCS, Bhel,

9 6035

what is 'A' Check & 'B' Check ?

2 1447

What is single break or Double break related to MCB?

2 2104

How to convert KW to KVA or KVAR OR kvar/kva to kw?

8 38914

open circuit test when performed on double the voltage & double the freq, then what will happen with p.f and current magnitude?

Aarti Drugs,

405

what is an S.C.R. and how do they work?

GE,

4 2647

How line capacitance & line inductance varies with increase in height tower.

755


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Un-Answered Questions { Electrical Engineering }

with out colour codeing on conductor how can be find what is r,what is b,what is y phases.....

379


Types of test in Switchgears, MCC, NGR and DB's how it should be procced. Can anyone give me the details here or email me to pasuvaraj.k@gmail.com

419


what would u consider to be the basic purchase order information you would need to proceed with a cable inspection assignment?

395


What is A check, B check, C Check & D check for a diesel Generat

466


how can found motors folt current ? how can disided circuit breakers caoicity and breaking capicity ?

443


send me all basic electrical question and answers

1194


When will you multiply and devide with derating factors to the actual value while sizing the cable?

412


Iin ESP why positive is grounded ? why not negative ?

562


kVA rating of ordinary transformer is increased when connected as an auto transformer because A transformation ratio increased B secondary voltage increased C energy is transferred both inductively and conductively D secondary current increased

582


why ht alternators gland plats using brass?

482


1)How much current can a 3-1/2 core 100 mm wire carry? 2)What are the special cables required for explosion proof wiring? 3)In case you do not have coal and salt for earthing, how can you achieve good temporary earthing? 4)One horse power single phase motor is more likely to get hot than a one horse power 3 phase motor. Is it true or false, if true why? 5)What are the different types of soft starters for large motors?please explain?

2266


From reading, Under voltage relay used also as phase sequence relay now, Why I use under voltage and phase sequence relay in the same circuit (ATS)?

233


what is the significance of terminal voltage and phase sequence in the operation of paralleling of two generators?

462


What about electrical Units. discrive in detail

364


Dyn1 transformer vector group testing how to do

118