Electrical Engineering Interview Questions
Questions Answers Views Company eMail

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 ??

2 4612

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

Essar,

3 7298

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

L&T, PowerHouse, YUI,

6 49914




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 ....

1 2726

how you can select circuit breaker for 2000kva transformer?

TATA,

9 13523

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

L&T,

1 3805

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?

884

what is the function of generator exciter

NTPC,

11 55289




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

1 3815

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

3 10339

WHAT IS THE DIFFERENCE BETWEEN KW AND KVA ?

10 26476

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

Focus, PSEB, FLSmidth,

8 27336

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

6 67545

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

857

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

1 2181


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Un-Answered Questions { Electrical Engineering }

If we need4× 50mm sq cable but it's not available so we can pull 4×25mm sq 2cables

94


How would your past experience translate into success in this job?

5439


What are the section criteria for cables. Now everywhere XLPE power cable is used or PVC is also used?.

468


WHAT IS DOL STARTER? HOW IT WORK? GIVE ITS CONTROL AND POWER DIAGRAM .

922


what is the transmission loss for electrical supply? specifically a large shopping complex where the grid is half KM away, what will the % of transmission loss? is there any transmission loss for captive unit generation for above set? thanks

791






How out of step protection relay works?

874


Why choke coil is connected in series with starter in tubelight??why starter is connected in parallel to tubelight??

1599


what is the function of impulse relay

1144


In Power cable specification what is U0/U and Um.

2008


I have doubt that the supply HZ (very low or high than rated ) may affect the power factor. is it true. ?

544


how to test reverse power trip?

1915


what is control supply rating of a machine

759


1.what is difference in maintain Hz again Hz in USA ? 2.how to calculate the battery AH? 3.why are yearly maintained in transformer how many tests in required?

1298


what is the profesional board for electrical engineer what is thepast and during construction for electrical engineering

763


What is the effect of atmospheric pressure & Temp; on efficiency of motor? Why NGR(Neutral Grounding Resistor) is used in 132/11 KV Transformer & how? What is the use of Auto T/F in Grid Station?

633