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 .

3118

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

3992

What are reasond for high wattage in single phase induction motors

1288

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

5130

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

1856

What is rccb?

4004

what happends when an isolater is operated on on-load

3475

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?

1214

why current is constant on d.c?

1490

what will happen if frequency is below 50 hz?

1463

distribution transformer de-rating formula on over limit iron losses

1730

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?

3148

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

NTPC,

4037

what is power factor?

5127

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

L&T, NMDC,

6356

Un-Answered Questions { Electrical Engineering }

IN dc capacitive reactance is??

850

In siemens PLC, why do we want to move the data ?

1787

How select ELCB for 32amp. socket having quantity 12Nos. We have to do this wiring in PLANT. Please Also explain the incoming cable specification.

1398

What is servo motor and what are different types of servo motor

1788

How will polarity test of Dy5 Transformer ?

1627

How to calculate LT XLPE CABLE for 11 kv / 433 v , 1000 kva oil type transformer system?

1253

sir, i'm preparing for hpcl exam officer trainee pls tell me how the exam ques paper pls pls

1690

what is meant by IGBT how they differ from tyristor ?

1850

What is difference between isolator and circuit breaker?

550

What is Electrical Grade Aluminum for Tubular BusBars. i am confused between 6063 and T6 or T5 and what is BS 2898 and BS 159?

1347

Why the cores of large transformers build up of circular cross section?

1639

What is electrical grounding?

552

working principle a.v.r. ?

1841

explain supply side and demand side energy management with advantages & disadvantages

1591

how we calculate torque ? how we improve it ?where torque will either motor or generator ?

1507