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 4225

why ct output is in 5A?

3 5788

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

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

1 6062

why power factor is important?

Dalkia, MGC,

6 10127

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

IBM,

2166

why impedance relay is used for medium transmission line protection

2264

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

1975

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,

2178

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,

1920

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

Amaron,

4 13827

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

1 4951

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

NCC,

2 5349

How to set the star delta timer setting?

Integra,

1 4523

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

1 3818

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?

2064

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Un-Answered Questions { Electrical Engineering }

what is the breaking capacity and making capacity of circuit breaker and how

2074

differnce between single acting and double acting solenoid valves

1794

how many single tension hardware are required on a double circuit transmission tower?

1877

what are the available sizes of pin type terminal lugs in the market today?

1801

What Normal(Tangent) towers and Tension(Cut-point) Towers?

6130

DESCRIBE THE CONSTRUCTION ANDOPERATION OF BELT CONVEYORS AND SCR CONVEYORS , DRAW NEAT SKETCHES

2026

what is effect of 5amp fuse on 2mva pry protection of transformer

1802

What is the lifetime of a Thyristor? Is there a recommended lifetime for thyristors after which they should be replaced?

2663

What is diversity factor in electric installations?

1127

Comparision of Air break circuit breaker, SF6 Circuit breaker and vacuum circuit breaker.

2311

i have 90kw motor.so i choose connect cable .please what is parameter checked so please give to formula

2154

In what cases (circumstances)we should apply P controller, PD controller, PI controller & PID controller ?

2139

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

2640

electrical

2260

What will be the voltage impact on secondary side of two transformers with different vector groups when both voltages are compared.

1951

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