Electrical Engineering Interview Questions
Questions Answers Views Company eMail

What is the maximun current carring capacity in per phase for three pole 100anps rating ncb

L&T,

3 5352

I am having dual speed motor of cromton greaves make of 3.7 KW -1400 rpm and 5 KW - 900 rpm. Please let me know groups and winding connction for rewinding purpose.

792

what is the calculation method to design core and winding of a 200kva 3phase distribution transformer?

1239




what are the effects on an power plant and consumers if the power factor is increased or decreased?

2 2436

What type of fittings and electrical accessories can be install in radiation area ?

601

in ring main system we use the isolater b/w transfer bus and main bus if we r not use isolatar than wat will be the effect in our sys.

809

why in electric train we can't feel current & generally we have get socked in our normal electricity ?

3 3253

what is the diffrence between kav and kvar?

5 16884




why generator and t/f ratings given in kva?

2 4647

what is the diffrence between dol and star delta strater? why star delta starter used instead of dol?

3 6174

what is the rating of boiler?

4 5124

How you calculate the repturing capacity of a HRC fuse

CPCL, RSCL,

1225

What is the exact load current needed for a place which has 100nos of bulb of each 100w?

2 2206

Can anyone explain me about the capacitor calculation

808

difference between shunt coil and tripping coil

GE,

8 55692


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Un-Answered Questions { Electrical Engineering }

why magnetising curve not start with zero voltage?

886


when ID fan will immediately stop through VFD what exactly cause and problem the ID fan

172


What would be the size of wire used for 2 Ton of window A.C?

732


Q.1:What protection will be used on HT and LT side of 33/0.4 KV, MVA transformer. Indicate capacities of protective device to be used. Q.2:Which types of back-up protections are used in the power transformers? What do you understand by the term over travel in the relay? Q.3:How star and delta connected winding transformer are provided from earth fault

866


In synchronization circuit what is the function of Interposing voltage transformer(IVT)and Reverse voltage transformer(RVT)

7978






i need list of swg(standard wire guage) or area of conductor v/s current carrying capacity of conductor copper & alluminium...

620


how test transfomer(3 phase75kva) by megger

862


what is the effect of vector group while phase sequence of a generator changes,whether the vector group changes or not

896


why dc is used in control circuits for MV & LV switchgeras instead of ac

537


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

544


WHAT IS DEAD END IN PROTECTION?

1238


what is the voltage regulation for unity and zero power factor?

995


regarding safety what would u consider the most important rules to observe when inspecting electrical equipment?

768


If a current -8+6sin6t is flowing three ammeter, one is a centre zero PMMC meter, one is true rms meter and one is moving iron meter. What are the reading of these three meter respectively?

768


where lt & ht capacitor used

890