Electrical Engineering Interview Questions, Answers for Freshers and Experienced asked in various Company Job Interviews

Electrical Engineering Interview Questions

Questions Answers Views Company eMail

Why we are testing cables with dc?

1 4315

why ct output is in 5A?

3 5926

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

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

1 6153

why power factor is important?

Dalkia, MGC,

6 10359

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

IBM,

2221

why impedance relay is used for medium transmission line protection

2329

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

2023

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,

2218

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,

1978

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

Amaron,

4 14035

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

1 5096

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

NCC,

2 5470

How to set the star delta timer setting?

Integra,

1 4640

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

1 3897

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?

2121

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Un-Answered Questions { Electrical Engineering }

What is the formuala to calculate the rating of motor protection circuit breaker

2221

model question paper for supervisor trainee

2038

Where can i get practical knowledge of solar system?

1452

is there any chart showing the suitable cable size according to AMP and length ? for three phase motors

1398

What is open loop and control loop systems?

1130

what types of cable used in underground coal mining?

1485

What are the function of different components of servo motor?

2046

Can a generator runs after getting 1st stator earth fault.

1409

1)How much current can a 3-1/2 core 100 mm wire carry? 2)What are the special cables required for explosion proof wiring? 3)In case you do not have coal and salt for earthing, how can you achieve good temporary earthing? 4)One horse power single phase motor is more likely to get hot than a one horse power 3 phase motor. Is it true or false, if true why? 5)What are the different types of soft starters for large motors?please explain?

4646

In which working principal temperature transmitter work.explain in detailed.

2328

what is the difference between fault current ant short circuit current?

2702

In electrical what is earth(ground)connection, wht is the importance of it, why it is recomended to maitain below 3VAC between Neutral and earthspecially in PLC used machines?

2216

How can calculate the rating of a servo stabilizer for given a specific load

3523

What is Phase margin?

1103

Earth bits close or open. Which is correct

1947

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