Electrical Engineering Interview Questions

Does RCCB do the job of MCB? Lets take 16A RCCB. it trips when residual current exceeds 30mA. does it trip in an over current situation, i.e when current exceeds 16A ??

6150

In 3phase power= Root*3*v*i*cos@ What is the power in 2phase....??? and Derive it

9335

What is the difference between KV,KVAR,KVA,KW?

57156

how to calculate voltage drop in long distance cable? for an e.g lamp of 12 volt ac ,300watt is 90 meter away from supply i.e (x'mer 230 v / 12v)and i m getting 8 volts at lamp terminal ....

3855

how you can select circuit breaker for 2000kva transformer?

TATA,

21389

What are the applications that use Solid State Drives in your home?

L&T,

5342

In between UPS out going changer over switch and ups raising main input, both side cable gland producing heat but the cable doesn't get heat,Why?

1805

what is the function of generator exciter

NTPC,

65574

One of the advantages of HRC fuse links is that they can be used to back up equipment with an inadequate rupture rating. briefly discuss what this means

5135

What is meant by the KA-rating of a circuit breaker? In this regard, discuss the stresses experienced by the circuit breakers

12884

WHAT IS THE DIFFERENCE BETWEEN KW AND KVA ?

31868

In Battery Charger - What is the meaning of End Cell Voltage and Float Voltage.

39891

How to Calculate the maximum Demand required for a connected load for a manufacturing Plant

79694

How to design harmonic filter at the project stage without nowing the harmonics levels

1852

How to connect a Restricted earth fault relay for 2000KVA,11/0.433 KV Distribution Transformer and What is the neutral CT ratio should be selelcted for 2000 MVA Transformer for estabilishing the Restricted earth fault relay

3521

Un-Answered Questions { Electrical Engineering }

why magnet has north and south poles only why not east and west and why we are considering as north and south poles? why cant we consider as east and west?

1571

3- What is the target from Zero Impedance, Single Phase Imp., S/C Imp. and magnetic balance tests?

1476

if in 3-phase system voltage=440V,frequency=60Hz, current=400A. then if it is single phase then current=? and if it is single phasing then current=?

2189

Why you are switching off arc protection mcb when you are taking shutdown for lv board.

1304

describe the Operation of induction generators from bus bars

1872

What is the need of generator relay panel

1590

sir please send me iocl written test paper in my e-mail account. i'll be obliged to you........ thank u roshan

1835

Control wiring of a dol starter for forward and backward

1099

what is self capacitance of inductor

1973

can we use ZNyn11 transformer instead of Dyn11 transformer in distribution for effectively eliminating harmonics from the industrial loads.

4570

Dear friends I want to design busbar for1600 kva transformer(i.e2100 amps) what are all the factors to be considered before selectinga busbar what are all the standard sizes of busbars what is the formula for finding current of copper and aluminium busbar

1549

IF % IMPEDANCE OF A TRANSFORMER IS INCREASED FROM 5.8% TO 8% HOW MUCH THE EFFICIENCY OF THE TRANSFORMER WILL COME DOWN?

2026

How to calculate energy stored in a capacitance

753

if we give 60 hz single phase supply to the transformer used in europe , than what will happen

1575

How to reduce -234126219.6403 MVAr generation and by what?

1287