Electrical Engineering Interview Questions

how we can calculate cable size of 230v,1 hp single phase motor ? panel to motor distance is 25 meter

16669

In induction machine when the load increase the current will increase .why? what is the relation ship between the sleep and current drown by stater?

2169

can we run a motor rated 50Hz,415vac,1440RPM At higher speed then rated on name plate with the help of VFD /drive on long term basis.wheater it will effect the motor life

6117

In APFC panel, Why on dealy timer is used in Capacitor controlling circuit?

8661

How wire size can define in electrical wiring? What is the ratio?

1844

i am trying to PSUs/govermeant jobs since last 2 years but still i m not success, plz help me.

1493

WHWT IS USE OF VACCUM CIRCUIT BREAKER

6961

IF 5000amp current on LT 440V. then how much it will draw amp on HT 11KV side

25551

why reactive power produce in generator? why inductive load absorbe reactive power?

5332

what happen if generator exitation lost?

11413

what is the basic paramter to set a electric drive

3422

what is the physical connection of a analog i/p to a analog i/p module (ab plc)and through a analog o/p module(ab plc) to a analog o/p . and how all the process control by scada

1473

if a number of plc s are there then how many modbus to be used

1578

1) name the communication cable and how it is communicate in between plc to modbus , plc with hmi? 2)name of the communication cables?

3601

what is the per unit cost of generation of electricity at thermal,hydro,desael,solar,gas power plant

3724

Un-Answered Questions { Electrical Engineering }

distribution is maximum done by a)radial b)network c) parallel d)b & c

1555

all interview questions with answers of ntpc (2000-2009

1807

Given a collection of points P in the plane, a 1-set is a point in P that can be separated from the rest by a line; i.e. the point lies on one side of the line while the others lie on the other side. The number of 1-sets of P is denoted by n1(P). The maximum value of n1(P) over all configurations P of 19 points in the plane is 18

1701

why genarator genarating voltage 11 KV?

1371

If you have an earth with pilecap then your resistance is really low. why and how?

1484

how to calculate the Neutral transformer impedance?

1883

What is pi controller?

717

What do you mean by Stimulastion Test in Diesel Genarator / Why & when it's conducted ?

1253

If I want to connect a capacitor bank on the HT side of a 11kV/415V, 3 phase delta-star distribution transformer to supply Reactive power to it..what practical specifications of a Capacitor bank that can i've??please reply..

2084

how to calculate the earth mat design in 132 kv substation yard ????

5772

why we dont prefer ac voltage controller instead dimmerstat [if both have same rating] for conducting experiments in laboratories?

1745

what is the importance of earthing system on the generators big capacity and small?

1366

what is meant by power and distribution transformer ?

1567

what is the working principle of energy saver control panel. please give the complete calculation & theory.

1876

What will be electrical cost per sqft for IT building (basebuild and fitout)and for residential township?

1505