Electrical Engineering Interview Questions
Questions Answers Views Company eMail

why dc is used in control circuits for MV & LV switchgeras instead of ac

1448

why dc is used in control circuit for mv & hv switchgear instead of ac

1433

what is the meaning of 0.5ohm Resistance

Vardhman,

1374

Advantage of 11KV ring main system with open point

Alam Group of Companies,

1 1913

Why Utility Distribution System in India is mainly at 11 kV? Why not Utility go for 33 kV?

1291

how we explain parallel paths armature winding?

1428

why 15 kw motor winding resistance is low then 5 kw motor winding resistance?

Baosteel,

2352

The coils having selfinductancs 10mh and15mh,effective inductance 40mh when connected in series aiding. what will be the equivalent inductance if we connect them in series opposing?

BSNL,

1 1607

what is the Pickup/drop off ratio in BCPU relays

DNJ Energy LLC,

4128

What is the breaking capacity of transformer and how can we calculate the breaking capacity of tranformer

Siemens,

1224

The magnitude of sum of two sinusoidal av voltage is equal to 230 volt.the magnitude of each individual voltage is also equal to 230 volt.what must be the phase difference between voltages?

PGVCL Paschim Gujarat Vij Company Limited,

1142

Three phase power is measured with two wattmeeter for balance three phase load.the reading of one wattmeter is zero.we can conclude that the power factor of balance load is?

1 1545

Consider three heater bank connected in 3 phase star with neutral.Each heater bank connected in each phase.So each phase get 230 volts supply.my question is,during balance condition, current flow in neutral or Not

1177

How to calculate multiplying factor of dc energy meter

1172

I have a 380 KVA DG set. How can i find out 1. My Fuel Consumption per hr ? 2. Electricity produced in 1 Hr. ? 3. If load varies then how does it affect fuel consumption & electricity produced ? Please HELP !!! Really need an answer.

2087


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Un-Answered Questions { Electrical Engineering }

if there is nutral in phase why we use earthing wire and grounding? even at fault condition the fault current flows to neutral (it is a lower path)

1312


what is solkor relay and which condition it will act?

2830


1.25 kg of hydrogen are burnt with stiochiometric air, the mass of air in kg required is

1399


How many capacitors using in LT panel as per Govt rules?

1472


which type of effect of turbine and generator reverse power protection ?

3732






how to calculate the settings for shaft ct protn in hydro generators

1476


WHAT IS THE DIFFERENE IN ACTION OF MCB,MCCB,RCCB

1923


How to Preparation of online test

1048


Which device is used for the source of emission of electrons in a crt?

698


Is neutral transformer can be called as control transformer?

1493


What is the difference between isolators and electrical circuit breakers? What is bus-bar?

649


A 11KV, 1200 A breaker combination fixed in a cubicle for HT motor.Is normally for 11 KV motor fuse is using? if Yes, What range fuse is required?

1482


what is the most permissible winding temp when we conducting a generator load test?(condition no load)

1202


What is meant by a stray loss of a induction motor??? What is the equation to find it

2556


It is desired to flood light the front of a building 42 meters wide and 16 meters hig.Projectors of 30 degree beam spread and 1000 watt lamps giving 20 lumen/watt are availabl.If the desired level of illumination is 75 lumen/m and show a suitable scheme.Assume the cofficient of utilization, deprecitation factor and waste light factor are 0.4, 13 and 1.2 respectively.

2867