Electrical Engineering Interview Questions

what effect will 10 milliampere current cause to human body

3723

how to increase senstivity of ct

1965

is it possible to turn on the single phase star delta on delay timer using 24 v dc ?

L&T,

1509

what is the diff between mcb and vcb

4899

what is the main parts of DG? how it is working?

6469

what is the main parts of transformer? how it is functioning? pls giv the ans briefly.

1500

What is the difference between synchronous motor & asynchronous motor

3708

are you hear the meaning of burden , excat meaning of burden in only one word

4919

how to find the transformer effiiency

5908

what curve and rateing would you use for a three phase 0.75kw motor?

1610

why ligthing is not available in switch yards?

3030

basic priniciple of induction motor

3958

WHAT IS ELECTRICAL MAINTAINTENCE ?

1609

In a star to star transformer can we use a common neutral for both star connected primary and secondary

3419

In synchronization circuit what is the function of Interposing voltage transformer(IVT)and Reverse voltage transformer(RVT)

ABB,

11066

Un-Answered Questions { Electrical Engineering }

When we use air circuit breaker, it has O/L protection ,time delay SC protection, Instataneous SC protection & ground fault protection. They all have some setting range. But what is the suitable/allowable setting for the above protection which will be safe for the equipment? For example-O/L protection setting have a range of (0.4,0.45,0.5,0.55,0.6,0.65,0.7,0.8,0.9,1.0)xIn Time delay SC protection have a range of (1.25,1.5,2,3,4,6,8,10,12)xIn Time delay setting is 0.02,0.1,0.2,0.3,0.4 Instataneous setting is fixed to 20xIn Gound fault setting is given 100A,300A,600A,900A,1200A This setting are for 2500A ACB. So what will be the basic allowable setting for the above protection? is there any formulae to calculate this<

1731

What is a Phase shift meter? Where can I get one?

1709

how to calculate IR value of 33KV cable ??

1381

what rectifiers is and what are the types of rectifiers?

676

1603

what is differentila pilot supervision in the incomer control panel in the power station?

1667

in parallel operation of power transformer why the distance between power transformer and capacitor bank feeder is necessary to know

1399

If I want to lift the water at a height 50m from ground level through two inch(diameter) metal pipe then what is the capacity of motor pump is required? is it possible in single phase supply or not?

1505

What are the main advantages of bode plot?

740

determine two methods to find loose connection in operational electrical system?

1277

Can anyone provide with a SLD for HT panel installation for a 33KV line and distribution end has three 1.5MV transformers. Is it suitable to use OCB or VCB and also provide me the suitable rating and its connection diagram.

2938

for 11KV OH system what will be typical per KM "R" "L" "C" parameter. for 33KV OH system what will be typical per KM "R" "L" "C" parameter. for 33KV UG system what will be typical per KM "R" "L" "C" parameter.

2042

3- What is the target from Zero Impedance, Single Phase Imp., S/C Imp. and magnetic balance tests?

1460

WHERE CAN I GET THE PREVIOUS QUESTION PAPERS OF Govt Polytechnic in deee 2nd year papers

2357

can someone explain that how the speed of the protection system affects the fault level calculation?

1517