Electrical Engineering Interview Questions
Questions Answers Views Company eMail

what is lowest system voltage?

Apex Holdings,

7 6678

only three phases are coming in step down tranformers.how to get neutral?

5 7013

New istallation how many eathing have one transformer? Names of earthing connect places?

10 26567

a bulb of 100W and anather bulb of 200W , rated supply voltage 230v.when supply voltage is reduced to 100v,which bulb will give more light? and why with calculation?

12 32564

if the diameter of a conductor is 'R' then what is the distance between two bundle conductor in a phase?

NTPC,

1 3164


in single phase we get 220 volt and in three phase 4420 v why this second Ques= in case three phase star conection our neutrul becom disconect what happan 3 Q=== a three phase house load and have unbalce load on different pahse diffrent current eg phase a 7A b 8A c 5A and voltage is 440 than how calculate it total load in kw pl give formula thanks

8 9539

WHAT IS SEMICONDUCTOR? EXPLAIN DETAIL. FOR EXAMPLE TAKE A PENCIL.THE LEAD IS MADE UP OF GRAPHITE IT IS A CONDUCTOR.THE OUTER COVER IS MADE UP OF WOOD IT IS INSULATOR.PENCIL IS A SEMICODUCTOR MATERIAL.

5 14273

what is Aircraft earthing and what does it do?

6 24681

Why is the diffrential protection in DG. What if the CT polarity is reversed while connecting for the same type of protection? How polarity can be made ok?

1 5612

what is corona effect?

ABB, Genco, Wipro,

39 85582

what is CT class? depending upon which it is classified?

Siemens,

3 7092

what is automatic voltage regulator and it is used?

ACME, TCS,

28 51842

what is meant by form factor and hoe related with the HT transmission voltage

2 6940

How to make vector group test of transformer?

2 6714


Post New Electrical Engineering Questions

Un-Answered Questions { Electrical Engineering }

temp of cast resin 1500kva tx formerwent up to 138.c but came down very fast to about 100.c within 20 mins when load was reduced from 70% to 60%

1466


What happened when capacitor connect series in ac circuit?

935


Two bulbs of 100w and 40w respectively connected in series across a 230v supply which bulb will glow bright and why?

591


I have a current transformer with 1 main reading meter with transformer outside the building and a control panel having 5 CT reading meters with black round coils inside the building. I want to know, A) when current pass through the Transformers, will the current be reduced or be the same and after that B) when current pass through the CT meters with black round coils, will the current be reduced or be the same. C) in the above process will the reading of the main meter be same or different, from the total reading of all the 5 CT meters.

1351


How to decide whether A / B / C / D curve type MCB should be used?

1828






what is load despatching

1636


in dc series motor if field wdg is shorted then

1421


how to calculate current carring capacity of cable and cable selection? 1) copper flexible cable 2) copper armoured cable 3) Aluminium cable

1028


what are the application of over current relay?

4181


Can u explain : what is supply for train (whether a,c or d.c ).I know that supply is 25000v a.c .But there is rumour that supply is D.C. And also explain how lights and fans inside the trains are working ,and what type of motors are used in trains whether D.C motors or induction motors .If d.c motor, how it gets supply.If traction motors are used then what are traction motors and its functions and how it differs from other motors and also explain about locomotive . y d.c series motor in train.train wheels r driven by D.C shunt motor ,at what voltage,and at what speed. please reply..............

1349


I want to put this query to SENIOR & EXPERIENCED ELECTRICAL ENGINEERS. 1)I want to know about the control circuit diagrams for control panels. I found it difficult to understand. Is there ant booklet through which we can learn the circuit diagrams? 2)I want to learn about conduiting, laying cables, preparing cable schedules and various techniques which is the part of building infrastucture(construction field). I don't have any experience in this area. I have experience in control panels only. that's why i am not getting any opening in building infrastucture (construction field).Can I get the job in this field as Trainee Engineer? How to enter this field? I need job in PUNE

1463


The synchronous machine excitation system explain

1297


Define resonant frequency?

694


What is Harmonics how it is produced and what is the method to control the same

1743


where are the circulat the diesel in DG parts name with pictue

1603