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Electrical Engineering Interview Questions

what is the max working temperature of an oil filled transformer say of about 1500kva.

10783

oil sample dielectric test gives the insulation rupture voltage at 26 kv. is this transformer safe to be operated . The working voltage is 11 kv

2778

We have one 500KVA transformer. We have tested REF relay and commissioned. After one and half year, due to some ground fault in one of the DB circuit Transformer tripped by REF relay. What will be cause and remedy. Please advise?

3895

formula for incomer breaker size calculation of powerfactor correction unit

15003

lightning current is ac or dc..?????

5842

HARMONICS ARE ALWAYS IN INTEGER LIKE 2ND OR 3RD HARMONICS,NOT IN FRACTION LIKE 0.5 HARMONICS.....????????

2725

what is resonance in electrical circuit and its effect? where we get high resonance and low resonance?

1839

what is the formula for efficiency of francis turbine and generator for hydropower? what is best way to select francis turbine and generator?

HAL,

1564

what is reactive power (MVAR) and how it is control? how it is generate in powerplant?

13765

how to maintain standard votage in power system?

4240

What is auto reclose system in Circuit breakers??

17621

what is the general Classification of Generators

11155

E.B sending end to receiving end 33kv ug cable laid 8Km,receiving end to ss1,ss2,ss3,ss4 all are Approx 800 Mtr,can go for 33KV to 430V or 33kv to 11kv in receiving end and 11kv to 430 near ss ,which one is good for technically and economically.

JLL,

2482

which motor is used in watch..??????

18973

what kelvin's law ?

1073

Un-Answered Questions { Electrical Engineering }

Graphs of measuring power and speed on dc motor

1019

which of the following elements is not present in stainless steel

1515

How to calculate Grid rotor resistance(GRR) losses in slip ring induction motor?

1874

Write down the design procedure of commutaj.

1284

How to calculate multiplication factor in kva example 500kva ans pls ?

804

HOW TO CALCULATE EARTHING SIZING?

1090

Dear sir my name Ankit i m Diploma holder present working in Welspun Corp ltd Anjar as Asst.engg (salary 14400/month ctc) i Would like to change my company also i have selected in ford India pvt ltd Sanand as trainee Tech with salary 12000/month so please suggest me for changing my job hope for *ve response

1987

formula for calculation of switchgears(i.e. contactor, fuse, cb, relay etc.), if load current is given?

1208

errection check list for transformer maintenance

1669

do you have some of interview Questions in power and genrator section in general whith answers

1120

I am interested to know what does 15 KVA DG set actually means? If I dont know the DG rating, is it possible to identify KW by simply knowing the diesel consumption?

1195

What happened ,If 3 phase clearance not maintained in 33KV Line,11KV LIne etc?

1418

Two electric lamps 40 W, 220 V each are connected in series across 220 V. What is the power consumed by the connection?

556

How to calculate approximate load loss of a distribution transformer by knowing %ge imp of transformer?

1252

Can we put 3 layers of cable tray while installing tray

1513