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Electrical Engineering Interview Questions

what is dielectric heating

2803

what is relay

5824

what is balanced beam relay

11860

what is induction relay

4776

in 1-phase 230v,how in 3-phase 440v. in each phase in between 230v.

1919

can I connect step down transformer(25KvA,240V Phase to phase)to output of online UPS(15KvA,440V PHASE TO PHASE) Load connect to TRANSFORMER is 13KvA,240V PHASE TO PHASE. please brief if it is wrong

3442

What will the effect on a motor designed at 60 HZ, and operated on 50 HZ ??

7352

in 132kv substation CRT means

1621

What the purpose of transient fault recoredr in substation

NCC,

4044

There are Two questions about Steam Turbine Generator... What is HRSG bypass of LP, HP used for in power generation? In particualar, in the event that fault of HP bypass, there would be STG TRIP in operation but none on the LP bypass fault...what's the reason ?

1402

how calculate external illumintion in a compound area. for e.g. there is one open park having 600m2 area and i have to put 40w flouresent tube fitting with pole. how shall i calculate the numbers of fitting.

2045

How will you explain transformer action in case of 3-phase induction motor?

4001

what is first pole to clear factor

7167

Brief working principle of fluorcent tubelight,function of starter & choke.

20816

why field winding is placed on rotor winding not on stator winding in case of synchronous machine?

HAL, TATA,

28567

Un-Answered Questions { Electrical Engineering }

How do u analyse protection fault when vcb tripping on load

759

for what voltage will reactive power be largest in 380 kv line : a) 375kv b)380kv c)385kv

556

How to calculate the copper in HT motors if KW, RPM & Voltage is given

2134

which type of stability limit is higher,steady state or transient? why?

983

whats the differece between Exd and Exe

3807

what is the Earth Voltages in Power Plants, Sub-stations, Industries, Residential & Commercial Buildings.

1212

What is meant by earthhing of a magnetic flow meter and when to use empty pipe detection?

1113

Practical condition in 400KV Sub station:- Breaker(open) , isolator(open), Earthing (close) at both end e.g A & B. Now Open A Stn Earthing than Open B stn Earthing (Which have a 50MVA reactor) , AND suddenly show R,Y,B phase 704KV,573KV,118KV respectively. Que is without closing of breaker how it is possible.???? My Whats app No:07621840498 for Further Discussion. Pls experts suggest.

1137

the typical output of a solar cell is........

1390

What fomula is used to calculate: 1. rated frequency withstand voltage, and 2. rated lightning impulse withstand voltage.

830

What are the classifications of heating element?

1074

what size steel armoured cable is required to support 1500kva capacity. would 70mm squared be enough or would I need 90 or 120mm squared 3c plus earth

585

how can you calculate fault level ?

1468

What are test values for an 63 KVA and 100 Kva Distribution Transformers for the following typical tests 1)Magnetic balance 2)Short circuit test 3)Open Circuit test 4)Vector group confirmation test .please give me the standard values for all the above tests.

1867

What is NGR . What is the purpose of 10 sec ,60 sec rating of NGR.

843