Electrical Engineering Interview Questions
Questions Answers Views Company eMail

why DG,Transformer,UPS capacity will be tell in KVA but not in KW?

Godrej,

4 9952

In ac which gas will be use?

2 3483

In chillers & freezers which gas will be use?

3 3876

In transformer which temp should be less oil temp are winding temp?

TCS,

7 14340

what is the diffrence between earth and neutral.

1 3760

Dear Brother can u tell the proper size selection of cable & the fault level calculation of braker, busbar etc. pls mail me at azeemk30@gmail.com

1404

why spark is produced in mosquito bat?and what are the ways to reduce it?

Godrej,

2 7080

why do we use UPF watt meter in short circuit test of the transformer and LPF watt meter in open circuit test of the transformer

Bell, TCS,

2 32027

if the load is reactive then what is the use of calculating the real power and what is the use of reactive power if my question is wrong please excuse me..

1 2935

What is Energy Audit..?

2 4708

In LRS how much water PH value maintain for good operation of motor?

3 16956

how the earthing point or earthing is taken for ships and airplanes?

1 6813

In ht capacitor ckt we are using LBS Panel it having isolator with fuse, one of HT fuse flash over, so what is reason behind this event.

1551

which metal is use in shunt

4 5170

why generating voltages are of 11kv 33kv 22kv of 11 multiples

5 5980


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Un-Answered Questions { Electrical Engineering }

Why is it prefer to initiate circuit breaker failure by "86" lockout relay not by "94" tripping relay ?!

1278


Actuality I have at home electrical panel with 220v 50hz, and I want to converter from there to 110v 60hz, to wiring on the half of my house. Also I like to keep another half of my house with the original 220v 50hz. What is the best and safety way to do?

1329


what is meant by vector group of a transformer? How can it be derived?

1491


How to Calculate KA Rating of Main LT Panel

1145


what is the reason for indication of light in the earth lamps of main switchboard.if there is an earth why does one lamp get dim and the other two bright.

1848






how to build a network which step down 415v to 1v rms

1424


how to remover corona effect and hysteresis losses from contactor

1536


If one lamp connects between two phases it will glow or not?

590


What is systematic error?

792


How to do bus bar short circuit calculation for 230KV/11kv, 60 MVA Substation?

4232


How many double suspension hardware fittings are required on a double circuit transmission tower?

1386


If o/p power is doubled by how much does the sound increase

617


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.

1478


what is reactive power?, why its measured in VA ? is it transient behavior of system?

1768


Define piezo-electric effect?

680