Electrical Engineering Interview Questions
Questions Answers Views Company eMail

How harmonic block test are conducted on relays ( Siemens,Areva ect )power transformer using omicron kit?



What will happen if we do not provide earthing to the newtral of a power system ?

Jindal, NPCIL,

2 4699

What is the difference between newtral earthing and body earthing?

JK Lakshmi Cement, NPCIL,

3 5551

give me battery AH calculation in U P S

1 3646

what is the difference between relay and a contactor.


5 15139

what is the sludge current


check list for anuval maintatince check list of oil transforms

2 3364

can volts/Hz be relied upon to use 460v,60Hz electric motors on a 380v,50Hz power supply?

1 2906

Where double earthing is required? Is there any power specification to have double earthing?


10 44842

What will hapen if we connect more capacitors than required for powerfactor control? Exactly what will be the effect on power system?

Mandovi Pellets,

2 4291

what is a panel board?

1 2950

Can u explain : how capacitor act when the supply is given is a.c and d.c. I know that when d.c supply is given then the capacitor charges and becomes open circuited. But please say about when a.c is given. I have seen that when a.c supply is given ,it charges and discharges, But when we plug in capacitor to our daily supply and take it out ,then we join those wires spark will appear,which seems charge is present ,but when a.c is given it should charge and discharge

3 3633

can we use the step down transformer to step up transformer

6 6743

How to design the earth grid for lightning protection in an industry

2 3638

can we run all LT motors at 360 volts which are normally rated 415+/-10% voltage rating


2 3165

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Un-Answered Questions { Electrical Engineering }

In our factory so many iron pillors are exists for supporting the shed/Hangar. If do more no of earthings at one piller instead of doing more earth pits in many locations and running earth strip around the hanger, I can save the money. Please suggest this method is acceptable as per Is specifications though the Earth resitance of the farthest piller is with in the limits as per IS specifications.


What is the difference between security constraint unit commitment and security constraint optimal power flow?


how can we design robots


How to design the NGR Resistance


ult of expression 'document.FrmQF.myem


sir please send me previous year questions of jspl of electrical section through which i could prepare myself fpr the test.


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.




if there are six generators (3 gas CATT, one Jenbacher o1 MW each, and two nos Diesel 01 no 01 mw other 0.65mw EDGs ( say), 3 CAtt gas set have identical pole pitch,01mw EDG and Jenbacher gas Set have different pole pitch, how their power connection can be done to connect a common bus bar during installation. in short, how different pole pitched generators power connection can be done to connect a common busbar system through generators incomer ACBs.


Why do we avoid electrical conduits in floors at apartments?


What is difference and reason b/w -48V BTS system and 24 V BTS system. Plzzzzzzzzz tel me.


how does high earth to neutral voltage affects electronic circuit?


Dear all: Recently we got a question about Interface between PMS and SAP-PM.once we got a update message from PMS.we should set the deletional flag for functional location in SAP system.Is there any FM or BAPI to use?There are only functional location create and change provided by SAP. Best regards!


difference between ac series and parallel circuit


What is the difference between isolators and electrical circuit breakers?