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

Electrical Engineering Interview Questions

Questions Answers Views Company eMail

What is different bewteen low or high impedance busbar protection scheme

4083

Transformer Secondary maximum current (max. load)

3 7424

why the generator will take 8 to 12 hours to start after it got interrupted due to technical problems in case of power plants.

NTPC,

1 4155

Can we put 3 layers of cable tray while installing tray

NTPC, Siemens,

2365

pre arcing time of ehv breaker

2095

use of PIR in ehv breaker

2121

how ct burden,magnetising current,ratio and knee point voltage are related & derived

Dalkia, SCT,

2163

when current lags behind voltage how does it affect the circuit.In other words what is the significance of lagging current?

3 7238

how much Watt can we fully load a transformer

4 7931

What is the function of Igniter in 250 watt HPMV street light?

1 8685

how much amps will get from a 360/11kv line

2 4487

what is the MNA in case of d.c. machin? whaty is the importance of it? hoe it affect the brush position?

TATA,

2 7242

I have one ct of ratio 3000-2000/1 Amp its knee point voltage mentioned on name plate is 500-333/30mA-50mA at Vk/2. in secondary box there is three terminal named 1S1, 1S2, 1S3 then on which terminal obtained the knee point voltage ie 1S1-1S2 OR 1S1-1S3 & also specify the knee point voltage for the ratio 3000 from name plate.

2397

what is the meaning of stub protection?

1 5684

whatis knee point ?

L&T, Siemens,

5 10632

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Un-Answered Questions { Electrical Engineering }

where lt & ht capacitor used

2185

Advantage of LT panel vs HT panel

2883

Can you please explain creepage distance in detail, for a 6.6kV cable head what must the distance be and how do you determine it?

2836

What does the term “voltage regulation” means?

1049

How to select circuit breakers rating eg. if i select a circuit breakers of capacity 40 amps DC with operating voltage 28 volts and if i what to use same circuit breakers for 300 Volts DC application what is the current rating of this circuit breakers.

1691

What is the difference between solid grounding and impedance grounding?

2050

how a.c. genarator control power factor when its conected to grid supply by incrising or decresing excitation voltage.

3318

can the measured percentage error during calibration of single phase energy meter be negative?

2363

WHAT IS counter flux IN CT?

1906

any one can explain the stages of a knee point which is taken during ct magnetising curve.

1739

How to know vacuum in vacuum cylinder of breaker in working condition

1907

Differentiate between induced emf and self inductance?

1102

What is called limb of a transformer?

1010

what is upper impedance and lower impedance of a distance relay

1995

can anyone explain the star-delta motor control wiring ,which wire go where and how they operate?

1414

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