Electrical Engineering Interview Questions
Questions Answers Views Company eMail

What is the deffrence between Siemens S7-300 & S7-400 PLC?

ADC,

4 22923

Which Programming software are use for Allen bradley PLC's?

ADC,

16 14890

what is the difference between ac and dc generator

14 32095




what will happen when choke in tube light circuit was not working???

6 10411

what is the use of starter in tube light?and what it contains

RRB, L&T,

12 39459

How to calculate the transmission losses incase of overhead transmission lines?

Jindal,

6 8698

what is the different between second harmonics and third harmonics ?

1 2672

what is advantage in open delta connection?

20 53574




why are we maintaining some specific gravity in battery ?

5 5243

how do you test the capacitor bank ?

Essar,

12 28365

what is the procedure for cable sizing or on what basis we will calculate the size of cable?????

Focus, Mecon, ANG,

6 14214

How to take vector group test for Ynd11 transformer.

Voltech,

2 10432

How silicon gel sucks moisture in the transformer, its have any small exaust fan behind silicon gel.

4 3886

what is the function of starter & choke in the tube light set & how choke give 1000 volts while switching on.

IBM, ADNOC Abu Dhabi National Oil Company,

14 73516

How transformer winding & oil gets heat.

3 4005


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Un-Answered Questions { Electrical Engineering }

what is lrs tank water resistance.

1300


what is load despatching

893


How we can calculate the life of Lead acid battery

493


IN MY SYSTEM THERE IS ONLY OVER CURRENT EARTH FAULT RELAY IS AVAILABLE. FOR THE UNBALANCE SENSING IS THERE ANY RELAY IS AVAILABLE? THE SAME CTs WHICH ARE USED FOR THE OVER CURRENT EARTH FAULT RELAY CAN USE FOR UNBALANCE ALSO?

1856


What is trip and closing coil in cb? Why need of them

214






what is the safe meggar values for motor, transformer HT, LT and Cables? IF we want to replace I/C bay at our 220 kv substation which is of 140 mw load capacity bay to be replaced by 400 mw capacity bay.other than CT(1200/1) what are the other equipment i have to replace. why we generally use 3.5 core cable or in other word 1/2 core for neutral and also confirm me that in balance conditiob(3 phase)current in neutral will zero

947


A 100 kVA , 400 v/250 kv testing transformer has 8% leakage reactance and resistance on 100 KVA base . A cable has to be tested at 500 kv using the above transformer as a resonant transformer at 50 hz . if the charging current of the cable at 500 kv is 0.4 A find the series inductance required . Assume 2% resistance for the inductor to be used and the connecting leads . Neglect dielectric loss of hte cable . what will be the input voltage to the transformer ?

1816


how did the testing of protection relays done through current injection

857


high voltage transformer input voltage,current and amps rating..distributed transformer input voltage,current and amps rating...

726


what do you mean by class PS CT and what are technical details needed for calculating it?

744


What is the tube exial fan?

740


why in the three pin plug all 3 pins are cutted ?

737


How many lightning arrestors to be installed on 50MX60MX10M building and is there any formular for that?

707


How to calculate fault level of 11 KV system

504


10 tube light connect in mcb breaker.one tube light is fault.so breaker is tribe.how fault is rectified.(using 3wire phase,earth,neutral)

1111