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Electrical Engineering Interview Questions
Questions Answers Views Company eMail

how to detect the presence of underground cable(while digging road)etc. -give the name of instrument

NTPC,

7 9720

how to measure the A.C flux .-instrument

NTPC,

8 7290

which subject is better to tell when hr asks the area of interest?..

1136

if step down transformer step down the voltage,will current will also be proportional step up. If yes then how transformer handle such a large current?

4 6738

What is the meaning of Fault level rating?

Balrampur Chini Mill,

1 9243

Why semi-conducting insulation is used in XLPE cables?

1 3717

I have a 600VA UPS for computer only. It holds for 20minutes only. 1. Can it be upgraded for longer period.? 2. Can it be used for one ceiling fan and a tube light? If yes, how to upgrade?

11 33178

what is the knee point voltage ? what is differtial rela? what is impedance and % of impedane? what is the postive phase sequance ? negative phase sequane ? and zero sequance impedance ? what is sortcircuit calculaion? why take calculation? define stabilty test ? why? what sentivity test? define merz protection ? what is the burden ? class 5p10, accracy, metering ct take knee point voltage test thet time what heppan why dont take knee point test to metering ct?

1833

how can we change the rotating direction of single phase AC induction motors?

Heubach Colour, L&T, MNM Jain Engineering College,

12 72474

why C T secondary are rating 5A generaly .

7 9083

why earth hole size is biggest in socket point.

5 7012

If DG runing time Neutral earth connection Dissconect what will be the effect in load and equipments.

GE, HP, Reliance,

3 6008

If DG runing time neutral is disconnected what will be the effect in Engine and Electricial panel.

HP,

2 4376

What is transformer break down voltage.And what is flash oil flash point.

HP,

1 4234

Why dc Supply used in Control circuit.

HP,

12 23419


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Un-Answered Questions { Electrical Engineering }

Why is water motor not taking the pressure? what is the problem?

709


Why efficiency in thermal power plant is low?

252


derive DC RMS value for half wave rectifier?

2324


What is Anemometer used to measure?

284


Why induction motor is widely used in industry

1838






What is bridge rectifier and explain with details

1098


What is making & breaking current ???

550


how can we make cable shedule for controll wiring ? which details must be required for it.?

1212


What are the ratings of VCB, MCB, MCCB, SF6, ACB, and OCB?

686


Single phase and threephase power calculation

1186


difference between power surge and switching transient

1114


What is the formula to calculate the size of Aluminium and copper cable?

1049


what is the prinsiple of dc motor and construction and working ,application of dc motor.

1008


The windings of a transformer are divided into several coils, because?

324


From what on-site components does the HT panel monitoring the bus-bars in a 11kV system take inputs?

1107