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Electrical Engineering Interview Questions

how can we chack a capacitor in acircuit

3568

how can we chacke adiod in a circuit

2957

what are the different pre- commissioning tests performed on distribution transformer, power cable and switchgear?????

4215

what is V.L.F. testing of power cable? do you know the voltage ratings, like for what rating and size of cable what rating of V.L.F. testing is used?

1434

what is power factor ?

KSEB,

12378

difference between ac and dc generators

6398

name 3 measuring instrument used in transformers

4523

what is JE exam?

1231

I am an electrical power engineer and arranged power system for a data center, I installed MCB, ELCB and erthing system TN-C-S. But some times several ELCBs Disconnect circuits at the same time! what may be the reason? (the ELCBs are 25A ,30mA)

8204

what is the disadvantage if earth is connected to neutral

8582

If we connect the capacitor banks for DG set for maintainig the power factor, it will effect to alternator windings??????????

8104

How can calculate the efficency of the rectifier. input 240V AC, current 5 amps,P.F 0.98, Output is 54 V DC,62.6 A.

21917

In case of 11kV dual delta bank what are the recommended protections with specific CT / VT requirements? The capacitor bank is to be connected to the main 11kV switchgear from where the H.V.Motors and auxiliary 440V loads.

1823

whatis the difference between electrical and electronics?

10547

Hai I have 2500KVA,Transformer,13.8KV/380.DELTA/STAR.How much load that I can take interms of current?How can I calculate also when I have loads in KW?

L&T,

12546

Un-Answered Questions { Electrical Engineering }

fuel-air ratio in a petrol engine fitted with suction carburettor,operating with dirty air filter as compared to clean filter will be

206

i have 3500 amp load and select current transformer and perches.how i calculate .please understand

1280

What does ampere turns shows?

224

The shot circuit in any winding of transformer result? Explain

350

1153

If we have to feed a housing complex having load 8MVA, than what would be the better option, either we first step down 33kv supply into 11kv & than 430v or we proposed no of 33/.44 kv transformer, also which option is economical?

1265

how will calculate the safe starting current of 3-phase squirrel cage induction motor?

1034

What is meant by vector group

1502

how we control automatic generator i'e with to supply (main supply and local generator) when the main supply was break to supply the local supply automatically to begin supplying power.I now this control circuit is the combination of contactor time delay contactor switch and overload relay .but my question is how we combine those component thank you

1084

If I want to buy a new Xformer for my plant what are the main parameter will I need to check?

1024

what is the clear formula to calculate cable size for a load

1018

What is the Difference between Ac Drives and Dc Drives? According to application, speed, Torque, cost, Reliability, Construction, Motor etc... Thankyou !!!

1238

234 MVA Generator 3 phase Short circuit current Values required? Gen set Rating-234 MVA, Gen Voltage-18kv, PF;0.8, Xdv:23.5 %, Transformer Rating-18/380KV, 680MVA,Yndd1 two winding, Step up TR, ZT:35.50 %,X/R 4.33 Gen CB Position, CB open ,Disconnected open, Generator Running Voltage 18 Kv, Bi mistakes generator side earth switch Closed during that time short circuit current level in 3 Phase required, and how to test on site 234MVA Generator Short circuit current,

1198

5.WHICH TYPE WELDING PROCESSES USES NON CONSUMABLE ELECTRODE.........

1244

why so maney smaller size capacitor use instead of single Big size capacitor in apfc panel

979