Electrical Engineering Interview Questions
Questions Answers Views Company eMail

Why positive terminal of DC 48V was earthed?

1 3835

How can we measure earthing resistance test (Earth meggar) of Transformer neutral pit while in live condition?.

1624

Why did call copper as a electrical conductor?

ABB,

2 3692

why do we use spark detector inside the slip ring brush compartment 0ona slip ring induction motor?

1618

How we can come to know the substation range,without go through any name plate ?

CG,

1478

why we have to particulary use ACB for below ratings,even available of MCB,MCCB with that range ?

Siemens,

2458

How can we find the breaking capacity of a Load breaker switch (LBS) fed from 11 kv supply??ex:50KA, 26kA etc???detailed step vice answer pls.

1579

why we have to particulary use ACB for below ratings,even available of MCB,MCCB with that range ?

QRG Health City, Siemens,

2 6087

In an panel board if the outgoings are power plugs and motor equipments...what should we choose as the incomer of the of the panel board?? MCCB OR ISOLATOR?? Should we use ELCB protection??if so where??

2 3521

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

Gulf Industrial Services Company GISCO,

1476

why needtwo winding LV and HV in transformer?

Organic Industries,

1 2984

can anyone please help me to find the rupturing or breaking capacity in KA of circuit breaker (MCCB,VCB,ACB etc) of HT and LT side of a distribution transformer...please help with detailed step by step answer...thank you

1563

Why Closing coli supervision is not required for Circuit breaker.

JSW,

1 5355

Hi, I've just got into my electrical engineering course and I need some help with a question of mine here. During a site visit, we were shown a main LT panel which has switchgears, ammeters and different kinds of relays and the distribution network from that panel. In the main LT panel I've noted down the current readings as Ir - 163A, Iy - 150A and Ib - 147A. The Line to Line voltage is 415 V at 50 Hz and Line to Neutral voltage is 230V at 50 Hz. From the above details, how would I calculate the kVA rating of transformer? The primary side voltage of the transformer is 11 kV and the secondary side voltage is 415V and the frequency is 50 Hz.

2 3106

How to calculate earth wire load by formula

Caparo,

1956


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Un-Answered Questions { Electrical Engineering }

hai now i am working as a electrical design engineer in construction field can i get a job in oil and gass field or power plant project as a electrical design engineer?

1444


in indoor type circuit breakers why only the corner breaker trips specially during cold season. What is the reason.

1434


What is touch potential and step potential?

1615


Why LED light has advantage of rapid reflection ,although other lights alse reflect.? and this light is considered to be best for transmission usage in case of Free optics

1573


how to select size of hardware for linking aluminium busbar is it depend on area of busbar or current flowing through bus bar

1526






What is the role of Dedicated earthing in UPS System?

2624


cc of scorpio?

1768


r we are using in gas turbine mark (5) frame (6) (made in india Bhel 1997) Ā

1283


i want some interview related questions with their answers which can help for attend the interviews...

1181


Is it required to use Automatic transfer Switch in L&T panel board if we use AMF panel with DG set? How the single line diagram will be? Please forward the material to sreenu_207@yahoo.co.in

4242


What type of core material is used for metering C.T and protection C.T???

1680


what is the sludge current

1548


What are the essential characteristics of signal flow graphs?

653


what is PID control in VFD drives?

1492


how to calculate cooling requirement of datacentre from electrical load?

1855