Electrical Engineering Interview Questions
Questions Answers Views Company eMail

What is different bewteen low or high impedance busbar protection scheme

3640

Transformer Secondary maximum current (max. load)

3 6321

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 3487

Can we put 3 layers of cable tray while installing tray

NTPC, Siemens,

1922

pre arcing time of ehv breaker

1636

use of PIR in ehv breaker

1685

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

Dalkia, SCT,

1734

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

3 6049

how much Watt can we fully load a transformer

4 6437

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

1 8004

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

2 3718

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

TATA,

2 6306

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.

1938

what is the meaning of stub protection?

1 4922

whatis knee point ?

L&T, Siemens,

5 8550


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Un-Answered Questions { Electrical Engineering }

how to calculate cooling requirement of datacentre from electrical load?

1835


what is the need to express current and voltage in rms value? rms value is also called as effective value,what is effective value?

1457


how do i commission a distribution transformer knowing all its ratings and transformation ratios?d

3862


how much GROUND & NEUTRAL VOLT maintain in data center.

1506


define displacement & magnitude ?

1373






witch pump used in wtp

1590


In all analog voltmeters or ammeter showing some small size symbols. as well as a star and in star 2no. digit, resister symbol,and other. what is that's meaning ?

1550


how 650 volts creates? where is use?

1719


is this the formula of building wiring to get the main breaker.Watts/volts*.8%+higher motor*(25%)=ampere. yes or no or send the correct formula for building wiring.

1151


there are cam operated switches - why we call cam operated , What is cam ?

1446


what are the reasons of CT circuit faulty in busbar protection scheme?

931


What are the Full Forms of TVM, MTL, CVT ?

883


EXPLAIN THE ESSENTIAL FACTORS WHICH INFLUENCES THE CHOICE OF SITE FOR A HYDRO ELECTRIC POWER PLANT

1525


what are the 4 rules to start the motor?

1656


How to do cable sizing calculation for 750 A Neutral Earthing resistor for 33kv. the 33kv cable going to swbd. is 630mm2 3 runs.

4298