Electrical Engineering Interview Questions, Answers for Freshers and Experienced asked in various Company Job Interviews

Electrical Engineering Interview Questions

Questions Answers Views Company eMail

why voltage drop will occurs in 3 phase line?

ABB, Servo,

12 27132

As all us know that the capacitor panel is connected to improve the power factor when it is PF is low. whether we can connect the capacitor panel on D.G. side(? If it is yes means why?

Aricent, Essar,

1 6451

How to dimensioning SDCCH, LAPD and CS7 signaling on GSM?

1 7353

HOW TO CALCULATE THE CAPACITOR RANGE FOR LOAD FOR PF IMPROVEMENT? EXPLE:FOR 65 HP LOAD HOW TO CALCULATE CAPACITOR RANGE?

Al-Malik, All Star Electric, GEC, Reliance, Universal Industries,

12 46550

what is full form of lv and mv? 2.while we connect capacitor to generator what will cause for it?

ABB, Wireman,

4 32221

hw to calculate flc of motor ? data are:3-phase,50Hz,30kw

BRG, Reliance,

6 27917

how to find motor contactor rating and bimetalic relay rating? of 30kw motor which will operate on star-delta starter?

HCC, L&T,

6 21885

wht factor are considered to design ACB( air Circuit reaker) 415V

3 6874

hw to find transformer is in normal position? whether its in charged condition or not? except humming sound?

ABB,

9 14550

How can we calculate the fault level of the distribution system knowing the percentage impedance of transformer & subsequent equipments.

14 60479

WHAT HAPPEN WHEN CT SECONDARY OPEN DURING LOAD

Neco,

16 32843

HOW VFD USED IN ENERGY SAVING

ITC Infotech,

8 28684

whether the generating voltage can be made to be transmitted by means of signals to the recieved end or at the consumers end?

TCS,

6 9630

How do we check transformer losses and what are the ways to minimise it.

5 15619

if earthing is used in place of neutral how the circuit completd.

Epitome,

7 15154

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Un-Answered Questions { Electrical Engineering }

Define newton's law of viscosity.

1274

why on axial hitting up of air blast on hydrogen produced in oil circuit breaker,temperature rises of the core of the arc?

2021

HOW TO CALCULATE THE VT SIZING?

3213

WHY BREAKER ARE USED IN SUBSTATIONS?

2281

What information we need to prepare relay coordination chart

2392

Can clean earth cable be considered as low current cable

2013

Incoming line 11kv And transformer capacity is 2500kva. Consumption load is 1300A. Then fuse capacity is 11kv line.

1725

what is meant by neutral compensation factor and where it is used

1958

how is the testing of an REF relay? what are the test REF circuit having?

2041

If the earth is a good conductor of electricity, why don't people get shocked every time they walking on earth?

1893

I'm looking for a softcopy manual set for a Credence ASL- 3000. Anyone know where I can get it?

2098

What is quadrantal symmetry?

1708

We have drive feeding an output contactor for a 5000 hp motor @ 5kV application. The motor FLA is 629amps x 1.25% service factor = 786.25 amps The cable that we current have in place between the drive and the output contactor is 350kcmil- MV-105 (parallel cables). Per the NEC table 310.60 (C) (69). This show the cable ampacity is at 615 amps per cable for a rating of 1230 amps. We have derated the cable for the cable tray and the multiple cables application and our calculations show that after the correction factor factor we are at 922amps. 1230 amps x .75% correction factor factor = 922.5 amps. The customer is driving us to then use another safety factor of .25% off of the already derated cable. Can you please provide a longhand calculation for your solution on this application?

2197

what are the assumptions made in swineburne's test?

2226

In CTs tan delta point should be earthed , what is the reason behind it?

3079

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