Electrical Engineering Interview Questions
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whats the formula for convert KVAR to FARADS

2 7555

We have three 33kv substations. All of them energised by same source.When i am checking the phase sequence between one substation to other substation (like R Phase to R Phase) by multimeter i am getting some voltage.Near to LT panels UPS panels are there. Can u explain whether any possible to happen like that. In Phase SEquencemeter is showing correctly in both substations. How is it happen. Explain me.Explain me communication signal will produce Phase difference on this case.

3 2494

What is AVR in Generators and How is it working.

4 5085

is starting current of induction is high or stating current of ransformor is hign ,for the same rating


12 5692

Why is our voltage always seems to be 3.3Kv,11Kv,66Kvetc.. why not 40Kv,39Kv,65Kv???

3 3339

could i arrange a faulty and healthey battery bank togather in parallel , if your ans is not then why?

3 1894

could i arrange a faulty and healthey battery bank togather in parallel , if your ans is not then why?

3 1801

what is phase angle ? and also tells me why my phase-phase voltages are 390 rather then my single phase voltages are 221 and 223 respectivly?

2 1731

why we +ve load distribution in 24v and -ve load distribution in 48volt in the telecom sector.?

2 1847

what happen if we supply ac to the field of a alternator?

5 2787

how to calculate power consumption in slip ring motor at different step



in ONAN type transformer winding temperature is lower than oil temperature at evening time but morning winding temp is higher than oil temp what is the reason?


2 3141

how the grounding[earting] is achieved on ships.

1 2177

1]how the voltages and frequency are achieved on ships. 2]how does the line and phase voltages are related on ships.

3 1384

how many units will 100 kvar capacitor consume for one day?


2 4230

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Un-Answered Questions { Electrical Engineering }

Please clarify, 1. Is it required to lay two runs of GI wire along with Armoured LT cable if it is laid between one big mains (63Amps TPN SDF) to small main (32A TPN SDF) with proper glanding termination? 2. If the armoured cable with proper glanding is laid from DB to CNC machine, is it required to run two runs of body earthing to the Machine from DB? 3.If the armoured cable with proper glanding is laid from Substation to Hangar, distance is approx. 100 mtrs, is it required to do earthing at shop area though the primary termination at substation is earthed through gland.


how sensors are working?


why servomotor motor? where i apply for best output?




Where can I get CPWD electrical specifications & Shedule of rates? Please help me


How much maximum power can be transmitted on 66 KV transmission line?


what is 30-phase of transformer


What happen Grid EARTH plat got cut.


How to calculate of maximum demand if given 628kw, 785kva, 0.8 p.f.


2. What are the parameters of EHT sub-station?


what is excitation/


What effect does a very low impedance have on the Voltage regulation? On the short-circuit current?


What is the source of dependent source ?


How to calculate total harmonic distortion level(THD) in VFD? and how can we reduce harmonics?


following are the questions asked in interviews: 1) Considering the short circuit fault, which switchgear is preferable, SFU OR MCCB? Which operates faster? whicg one is popular in Indian Market and why? 2)Define SCPD. What is type2 coodination? 3)Why the contactor rating is higher for the fuseless selection than for fuse selection? whether the ratinf of SFU or MCCB remains the same in both the cases? 4)If the HP rating is known then can you calculate the ratings of L.V Switchgear(SFU/MCCB, contactor, OLR) without using the selection chart?