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Electrical Engineering Interview Questions
Questions Answers Views Company eMail

in Telecom DC system-why positive +ve is made earthed.and - ve is fed to load.

1538

what is servo motor and how it works?

Godrej,

1341

WHY DG are rated in KVA or MVA ???., but ALL power plants are rated in KW or MW.,,?

Coastal Energen,

3 10113

when we gave dc supply to 220v dc motor its rpm is 1200. then we gave 180v. how many rpm of its motor. gave answer with calculation at my ID.... ravizak@ymail.com

Godrej,

1285

Why is it preferred to use a wattmeter(s) to measure power in three phase systems rather than using a combination of other instruments e.g. voltmeters, ammeters etc?

2 4654

in power station what is the electrical circuit length of spacing between power transformer and lightning arrestors,for the voltage system of 230kv,110kv,33kv,22kv,11kv?

1 2480

HOW MANY POLES ARE THERE IN 3 SLOTS PER POLE PER PHASE MOTOR

2 8088

where is used dc volage transformer,and what is highest capacity of transformer

2 3266

can you use 400 volt 3 phase and neutral and earth equipment on 440 3 phase and earth supply safely and if so how?

Maersk,

2 5784

iam working as a electrical engineer. i want to know about any license or certificates regarding my field. for my carrier and ti improve the knoweledge.,,, how we get that..and what procedures......... pls help me

1 2920

how to testing the AC 3 phase motor? and what is the test procedure & kits required for testing?

3 5589

is it ok to switch lights from a mcb instead of switches

5 3943

what is the working principle of contactor and conditions of normal open and normal close on it?

EEE,

3 26780

if any house we instaled a 1.5 ton ac and its phase cable of wiring is installed but netrual cable of wiring not instaed. my question is that is neutual of house(for other wiring is capable for ac load or a sepeart neutrual wiring required

1548

1 no. 22 kV feeder is taken from state electricity board. 350 MVA is the S.C. MVA. now i am feeding this feeder to HT Panel having 2 outgoings which further supply to 2 Transformers. Can you please suggest me the type & rating of cables are 3 of these cables same? or they are different? please help...............

TCE,

2 4368


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Un-Answered Questions { Electrical Engineering }

what is smart grid? why we use it? explain in detals bcoz i want give presentatin from it....

1047


Why can't we parallel Voltage transformer secondary circuits?

502


1.why should we connect the measuring instruments in l.v side in short circuit test of a transformer? 2.why the power factor is less in open circuit test of a transformer?

1174


Circuit diagram of tube light without starter using electrical choke

3161


Mention the methods for starting an induction motor?

232






What is core CT & it's function?

1130


Define settling time.

193


We are designer please help me calculate the size of 11kv cables from step up transformer to M.V panel, total load is 5 mega watt distance 900 feet (used aluminum type cables) please provided formula for calculate the cable with example.

801


HOW TO SET THE EARTH FAULT SETTINGS IN ACB????????????

1171


in star-delta tranformer,if the input of star connection is 400/7v 3 kva then what is the output of delta connection?

1210


how to test power transformer.YNd11

608


What do you mean by the zone of protection?

175


how to wiring it with contactor and timer together

935


what is the effect of earth on capacitance in 3-phase and 1- phase transmission line?

1463


What are the advantages and disadvantages of the ac motors?

176