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Electrical Engineering Interview Questions
Questions Answers Views Company eMail

what is mean by harmonics?Type of harmonics?

6 5032

hi , i have 150 kw loud and we need 50 m cabil,i want to know wich size cabil we use. thanks

1134

Why let through energy not considered for ACB breaker while cable sizing?

1388

Why electrons flow only one direction in semiconductors. why can not flow both directions

1 2309

how can i apilly for electrical c licencese.sir,i completed B.Tech in electrical & electronics engineering in 201onot working any company

Subros,

1022

why ac ratings are in tons?

2 3149

if a bird sits on the service wire it didn't get shock then why the human get shock when he touches it(assume that human is not on the ground and any object i.e. in space)?

5 4348

why power factor is only cosine angle not sine angle?

2 3781

when measure the core loss of three phase distribution transformer or three phase reactor loss, one phase shown negative watt loss. why??

1139

what is the difference b/w bus reactor and line reactor?

1 13375

how to decide the capacity of accl

1418

What is Scheme Test of High Voltage Switchgear. Which tests it includes.

Siemens,

1506

How calculate cable size & voltage drop for the following requirement connected load 150 KW distance cable length 1000 M voltage 3 phase 415 v.

1 2554

how to put cable sizing and cable glands size for respective cable & Cable Lug size in a DB sectors???

1192

Difference between copper earthing & aluminium earthing?

2 3947


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Un-Answered Questions { Electrical Engineering }

What is the function of the circuit breaker failure relay?

1513


What are unstable systems?

234


can anybody send the rrb chennai &rrb bopal question papers of 2006&2007.My exam is on 12 oct 2008.Its urgent

1192


to hook up ten 50 amp rv pedastels at a lenth of 600 feet from the service what size will my service need to be and the size of wire will I have to run to each pedastel in series??????

1042


pls tel me the electric train traction motors name plate details like rpm,torue,voltage,amps,watts..ect..

1152






what is the differencce inn series and cascade connection??

3758


what is mathed of check the D.C MOTOR 181 KW (ARMATURE AND FIELD) WHAT IS THE MATHED OF CHECK THE THYRISTOR MODULE (HIGH CURRENT)

1107


why r we using shell transformer for low voltage

1111


7- What is the Dissipation Factor and the difference between it and Insulation Resistance Test? 8- What is the task (function) of DC and AC reactors in power plant? 9- What is the task (function) of (open delta with earthed) in some types in transformers? 10- What is the base of the selection of the vector group in transformers? 11- What is the zig-zag transformer and its function by drawing in large detail? 12- What is the polarity ? 13- Why we make short between phase(R) in high side and phase (r) in low side in vector group test? Where High Side ( R ,S and T ) and Low Side ( r ,s and t ). 14- What are the time on delay and time off delay? 15- What is the vector group? 15- What is the task (function) of different types of vector group such as Dyn11 , Dd0 , YNd1,……..,?

1362


dg earth connect only in the amf panel or not why

1179


Why the frequency of ac in india is 50 hz but in some other countries it is 60 hz.

1318


Why does increasing the magnetic flux in the main field of a d.c motor cause the armature current to reduce??

1149


how much leakage current is allowed in MC61A L&T make relay?

2711


What is the dependency of stiffness on load angle??

288


how can we determine size of a cable by knowing the kw or current rating of a load?how can we calculate the resistance box of a slip ring motor?

940