Electrical Engineering Interview Questions
Questions Answers Views Company eMail

if our load in 3 phase circuit is 4000 amp. calculate the capacity of capacitor panel if line power factor is.80 .

ST Micro,

1 3447

 where the Motorized mccb to be used? In Motor control center panel starters ,it is use full. please answer  

Voltas,

1 4283

What are reasond for high wattage in single phase induction motors

1522

why we use 50 hz frequency in india .. why not 60 hz 

3 5600

Arrangement of earthing materials.like what we put first charcol,then salt.then plate. Plz answer me about that.

1 2151

What is rccb?

1 4359

what happends when an isolater is operated on on-load

1 3885

in a solar power plant,we are going to step up the voltage 350V to 33kv, and to 132kv GSS. i want to ask that if it is possible that 315v/33kv is not possible because we also use 315v/11kv. or it should be 415v/33kv? is it effects generation or losses?  the second question is-generation is depends on LV winding? or LV winding design for generation voltage?

1433

why current is constant on d.c?

1718

what will happen if frequency is below 50 hz?

Student,

1709

distribution transformer de-rating formula on over limit iron losses  

IESCO,

1935

if a train is running on a speed of 40 K MPH and crosses a individual passing by him in 48 secs who is riding a horse with a speed of 25 K MPH. what is the length of the train?

2 3510

in a delta-star with neutral grounding on star side what will happen if one star limb  got opened at star point

NTPC,

1 4360

what is power factor?

3 5569

Why we are using LA Rating 10kA in 66 kv substation

L&T, NMDC,

1 6713


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Un-Answered Questions { Electrical Engineering }

If we connect a motor and generator together (I mean that the generator gives the motor electricity and the motor gives the generator movement) regardless the losses. Will the generator still generate and the motor still move?

1860


3 phase Motor will be given 2 phase after 2 to 5 second we given 3rd phase so Motor Run sum-time in forward or sum time run reverse direction. All time phase sequence is not change. Why motor run in reverse direction? Please Explain........

1607


How would you relate your key competencies to this position?

1880


BRIEFLY EXPLAIN THE STORAGE CLASSES AND THEIR TYPES IN C

1998


how does a shunt reactor maintains the bus voltage???

1698






what is photo voltic cell,& what are the materials associated with that?and any spcifications like volts/cm etc?

1757


What will be the size of copper cable (each for 3 phase and 1 neutral) from Service connection Kit-Kat to Panel Board (i.e. to main switch) for a 6 pole 3-phase AC induction motor of 200 H.P. capacity? Amp-255 A, Frequency:- 1450 rpm.

1602


What is domestic transformer? Draw the connection of domestic transformer.

1971


I have 4 DG set with 1500KVA rating. system breakers are 11KV & alternator are 415 Volts. Between alternator & breaker one stepup transformer used. i want to Know what is max. resistance for body earthing & 415 & 11KV V Neuteal earthing. my fault current is 14 times for 2 sec.

1972


What is main cause of cable's terminal point burned in Lug on high temperature although lug and cable selection is ok as per stantard and also tightness is ok as per situation. so please take in deep and tell correct answer thanku.

7670


Is it possible to download the Siemens Selection Chart(TYPE 2 coordination) for 1) fuseless selection 2)Fuse selection

7905


what are factors to be consider to design a HT & LT motor?

1967


difference between the applicability of nortons and thevenin theorem

1698


what is meant by IGBT how they differ from tyristor ?

2069


How phase displacement change in the over current relay coils.

1996