Electrical Engineering Interview Questions
Questions Answers Views Company eMail

Can I use RCCB in moisture control device in a submersible pump.

TATA,

2 5359

how the direction of rotation in a dc shunt motor could be reversed?

2 3453

in the exciter the power is feeded from battry or control or whatever.and we need it in the generators for the stating . do we need it in the shutdown also?i mean the exciter>

Shell,

2 3516

What is proximeter? where it is used and why?

1 3884

why protection meter is always connect to star

1 2525

Can we use same copper cable for both AC & DC power.

3 4556

why the earth pin is thicker than other pins in a plug? If it is for reducing resistance, then why the copper earth wire is not so thick as earth pin of socket?

Omax,

5 7105

why voltage will come different in phase?

HP, Vissa,

3 4627

What is the full form of GSL wire

Bhel, GSL,

7 24934

wil a dc motor run without a starter??

MRF,

9 18998

how do we fix the rating of mcb required for a specific capacity of the electric motor

2 4868

if there is nutral in phase why we use earthing wire and grounding? even at fault condition the fault current flows to neutral (it is a lower path)

1 3004

Require Generator Capcity ( KVA ) for 3 Phase Motor having 4.7Kw with starting current of 16amps?

1 3520

diff between UPS and inverter?

2 4674

why we dont prefer ac voltage controller instead dimmerstat [if both have same rating] for conducting experiments in laboratories?

1689


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Un-Answered Questions { Electrical Engineering }

How can get elongation of 2 k.G aluminium, if elongated aluminium dia is 2.5 mm?

1808


completed BE & done apprentice at tneb & having experience 6 years. want to get c license. will apprentiship & BE be helpful for getting c license. will i get any preference by showing this?

1186


is it possible to have dc motors on single chip

1348


which motor have relatively high power factor and what is reason for have high pf? 1.capacitor run motor 2.shaded pole motor 3.capacitor start motor 4.split phase motor

1472


How to decide cable tray size?

707






there is an alternator 480 k.w, 400v,50hz, 4-wire running on load having leakage alternator body earthed current 38 A. is it within acceptable limit? if yes then give reference if no then how to bring within specified limit

1491


USE OF 8 WAY PAN ASSEMBLY

1488


is there any lightning by passer is arranged in ship like buildings?

1464


What is the drawback of static coefficients?

865


How can a equal potential zone be carried out in conductors?

811


What will be advantage if we put some load in neutral of grounded star transformer & loadshortcircuit current,rated current of cable & MCB with example?

1401


What is the formula to calculate the size of Aluminium and copper cable?

1456


i have a 4 Mva transformer 34.5 kv / 480-277 v and i used 2 parallel 3200 amp bus duct for the secondary feeder using 3 ply of bus bar ( 3/8" x 5" ) as a common where the flexible link terminated and 6300 amps breaker for the main, the lower bus duct reaches 70 degrees and the upper bus duct reaches 55 degrees when i used thermal scanner. why the temperature is not balance when the load reaches 3600 amps.

1455


What are the different types of controllers?

641


what the principle of sincroscope?how it works?when it needed?

1755