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Electrical Engineering Interview Questions

what are the types of cables?

4637

suppose there is afault in transmission line connected to a generating station, then what r the adjustments u will take to without loss of synchronism?????

NTPC,

3575

what is the difference between UPS & Inverter

HAL,

11248

What is the reasonable voltage between Neutral & Earth of an electrical system for good earthing?

HAL,

9189

What is the general power consumption rating of CPU CRT type and Flat type, Monitor,Printer, projector, Scanner?

HAL,

1206

What is the current carrying capacity of 0SWG,3SWG,10 & 12 SWG solid bare overhead copper conductors?

HAL,

2724

what is starting current and use of starting current?

6417

during parallel operation of two ac generator which condition must match before taking both parallel i.e speed /voltage rating /kva/exciation

7897

model question paper for supervisor trainee

Bhel,

1395

what is the current density of copper & alluminium.

1339

Can 60 Hz transformer be used inplace of 50 hz transfromer?

5018

IF i have switchgear with busbar current rating of 1000Amp 35kA then is it necessary to have outgoing breaker kA rating to be equal to busbar kA rating?

L&T,

11381

The cable area of cross section is 185 sq mm. How to convert this to the diameter.

13226

can we use transformer for 70 Hz?

5709

can transformer develop three phase poer from a single phase source?

3215

Un-Answered Questions { Electrical Engineering }

give some advantages and disadvantages of combiniing the session, presentation, and application layer in the osi model into one single application layer in the internet model

1954

1234

In Air circuit breaker LSIG protection unit is used. Without fault in cables (2 runs 3Cx150Sq.mm Copper, 1Kv grade, XPLE armored cable IR value is more than 550Mohm @ 500V Megger) and load section Long time Overcurrent protection is triggers and trips the unit. We changed LSIG protection with new factory tested unit. Even then fault is persisting. Please suggest the possible causes

151

explain different losses in a transformer.

450

what is the relationship between current&voltage in practical purpose ?

3952

what is the formula to calculate voltage drop/loss on 66KV Transmission Line?

2976

How to test the vector group of a Yd11 transformer? what are the relations to be checked between various vectors to confirm this vector group?

3757

When we have earthing mesh or underground earthing network in industrial plants, weather we have NT-S or NT-C-S kind of earthing system, so eventually weather we must use 4 or 5 wire in 400 volt level (For example 3×150+70 mm2 or 5×150 mm2) in this connection I would like to know exactly the paragraph of IEC or IEEE number

1529

Dyn1 transformer vector group testing how to do

1167

What is the basis for framing the rules of block diagram reduction technique?

712

how to increase senstivity of ct

1737

Advantages/Disadvantages of earthing of neutral bus on MSB instead of separate neutral earthing for transformer/DG sets feeding to MSB

2093

what ispositive, negative, zero sequence impedence?

1405

what is the effect of power factor of machines in starting current

1350

why do we measure VIBRATION in -24vdc and why we adjust gap voltage -9vdc to 10-vdc? i am trying to get this information since 5 years, yet i haven't get reliable answer, i hope i can get from you.

1211