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Electrical Engineering Interview Questions
Questions Answers Views Company eMail

Why we are testing cables with dc?

1 3240

why ct output is in 5A?

3 4346

why we use copper earthing for neutral while for body GI.

Chennai Metro Rail Limited CMRL, Valeo Lighting Systems India Private Limited,

1 4500

why power factor is important?

Dalkia, MGC,

6 7448

can u describe the method used for protection of transmission line.

IBM,

1455

why impedance relay is used for medium transmission line protection

1592

why they were using TRIAC instead relay in some controllers and what is the advantages.

1354

we have earthmat at 110KV substation.we would like to take earth resistance.b some says that by connecting earth megger terminals (C1,P1) at middile point of earthmat (at riser) will cause voltage gradient at other earthmat nods and dont get exat earth resistance.when connecting at end nods will get exat value . is it correct .please explain

TNEB Tamil Nadu Electricity Board,

1507

I have a small system with two motors that are running on 380 vac, 60 hz. These motors are expensive and I usally get them from Brazil. I am adding another motor to the system, but I want to purchase a 480 vac, 60 hz motor to use. It will be on a VFD that is rated fro 380 thru 480. Is this posible and will I have to use a larger motor and derate it?

US Electrofused Minerals,

1334

what is basic difference between the normal tube light choke and electionic choke ?

Amaron,

4 11404

what is ring main unit(Rmu)? what is its function

1 3956

what is the chemical name for oil that used in the transformer

NCC,

2 4120

How to set the star delta timer setting?

Integra,

1 3278

what is the differance between normal bybass & maintenance bybass in UPS?

1 2617

Generation of voltage for each phase are same of a turbogenerator.Although the short circuit current flow when two phase of turbogenerator are shorted(where current can't flow without potential difference),why?

1476


Post New Electrical Engineering Questions

Un-Answered Questions { Electrical Engineering }

primery try cell?

1370


What is vaccum currcuit breaker.define with cause and where be use it device?

479


pls tel me the electric train traction motors name plate details like rpm,torue,voltage,amps,watts..ect..

1382


Can I use star delta connected induction motor for dual supply voltage?

1350


WE ARE PLACE A NEW 75 KW MOTOR FOR JPF.IT IS CONNECTED IN M.C.C. WHEN WE ARE STARTING M.C.C.INCOMER IS TRIPPED.THEN WE ARE CONNECTED IN P.C.C WITH A MM30 RELAY PROTECTION THEN WE ARE STARTED MOTOR WILL RUN SMOOTHLY.

1388






What are the difference between normal application Transformer and Solar application Transformer?

1081


plz send me the placement interview question and answers of whizchip(technical and apttitude)..i have an interview in next.

4312


harmonics filter

1346


Where I can get the sample question for post of Junior engineer electrical-II For RRB Bhubaneswar.

1502


FOR 16/20 MVA 132/33 KV ONAN/ONAF TYPE TRANSFORMER IT IS DESIGNED FOR 16 MVA WITH ONAN CONDITION.IT BECOMES 20 MVA UNDER ONAF CONDITION.LOAD LOSS IS GUARANTEED FOR 65KW AT 20 MVA AND % IMPEDANCE 13.75. PLEASE TELL US AT WHAT LOAD LOSS AND % IMPEDANCE IT SHOULD BE DESIGNED FOR 16 MVA AND WHAT WILL BE ITS EFFICIENCY AT 20 MVA?

2732


what is the differencce inn series and cascade connection??

3978


(1)Can earth and be conected together (2) what is the diferent between earth & neutral

1087


what is transistors comprised of?

486


A Generator is in running condition and Rotor earth fault alarm is coming.How to check on line(i.e in running condition) whether there is actual earth fault in rotor or not.

1298


We have a couple of oil tanks at our plant. One of them does not have a lightning arrester installed. My question is it necessary to install an arrestor on every tank or will this particular one be covered by the arrestor installed on the ajdacent tank, Since all the tanks are close to each other. Basically, I want to know that if these arrestors or protection works in a parituclar area of effect or influence. Thanks

1402