Electrical Engineering Interview Questions, Answers for Freshers and Experienced asked in various Company Job Interviews

Electrical Engineering Interview Questions

Questions Answers Views Company eMail

what happens when we give supply to the secondary of a transformer ?? for example 415v(pri)/110v(sec)

2 5557

what is mean by tan-delta tap in the potential transformer??

2 6344

which generator is called as brushless excitation generator and why??

3 9394

difference bteween neutral grounding resistor and neutral grounding transformer??

1 4758

how to find the capacitance value of the motor while running??

1878

what is the difference between delta-delta, delta-star transformer???

3 19312

how to calculate the ngr capacity(nutral grounding resistor)

Divis Laboratories,

2 10606

how to calculate the earth mat design in 132 kv substation yard ????

Divis Laboratories, KSEB, SWPL,

6185

how much distance is required for earth pit to earth pit in substation???

Divis Laboratories,

3 11140

what is full form of dyn11( in transformer)

Divis Laboratories,

5 13146

how to estimate the breaker capacity of breaker,please give the one example( 6.6 kv breaker,800a)?????

Divis Laboratories,

2 5400

How to calculate the current of Highpressure Mercury Vapour Lamp?what is the basis?whether we have to consider power factor or not?

Divis Laboratories,

2096

why we use stones or rock pieces in transformer area?

10 30852

how to calculate restraing current and operating current for differential protection if 20 mva transformer is OLTC 33 kv/11 kv ? and what should be the type and ratio of CT?

L&T, OPS,

2 5923

why the neutral point of star connnection oscillates?

Avalon,

3 7338

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Un-Answered Questions { Electrical Engineering }

What is the difference in calculating size of AC cables compared to calculating size of DC Cables? Usually DC Cables are larger than AC Cables although they have the same ampacity. Why is it?

1931

What is the RMS and DFT principle of analogue maesurments. Which way they are advangages. where which princples give optimum results.

2629

we have amp, voltage, kw, length detail then how to calculte copper & alluminium size of conductor of 3-phase induction motor

1409

there is an alternator 480 k.w, 400v,50hz, 4-wire running on load having leakage alternator body earthed current 38 A. is it within acceptable limit? if yes then give reference if no then how to bring within specified limit

1894

draw a circuit diagram connecting transformer OLTC- RTCC- VCB-Marshalling Box otherwise Explain in words

22987

Is it possible to protect 3phase overload and earth fault of the 3phase system using two CT's.

2080

v/f drive basic princeple

2434

what is the soft starter principle? how is connection diagram? what is the procedure for checking the connection?

2129

what is the need of starter in tube light and what type of starter is used in that?

1966

how can service sitting be setted for MCCB?Example for sittings IR (CURRENT RATING),IS(CURRENT STARTING) I O (current operating)?

2173

A 1F capacitor is charged to 100V initially. A 1H inductor is connected accros the capacitor througha a switch. The current in the circiut when the switch is closed is____

2291

why occ characteristics of generator is also called as magnatization characteristics ?

2044

how to calculation increase power factor for single phase

2262

WHAT IS THE FUNCTION OF SHORT CIRCUIT MAINTENANCE CT

2413

why in an industry; machine having rated 200 h.p stopped after power factor is maintained above 0.97 lag by control panel in view-of energy saving

2117

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