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

Electrical Engineering Interview Questions

Questions Answers Views Company eMail

How to select the gauge of wire for winding of motors? How to select number of turns for winding of three phase induction motor?

npcc,

2697

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.

2044

why do we provide metallic enclosure to bus duct and then ground it?

1 4581

how to interlock 3 incomer-ACB,1 buscoupler ACB,... pls answer this question and if possible send me the ckt diagram..haifriends2910@gmail.com

2852

Why we use 4-20 mA Analog signal for the PLC input? Why not 0-20 mA? Why not 5-25 mA?

2852

If any cable burnt how can we identify it burnt by high current of high voltage?

2407

Why we use Delta connection in the secondary side of a High Voltage transformer?

1 3757

What is the function of NER and NET?

Asian Paints, GHH RAND,

2409

what are upstream faults and downstream faults in power system

Sreetech,

2 10120

What is the difference between surge arrestor and surge capacitor?

Shreem Electric Ltd,

2 9948

why we used dc supply for field in dg set

Hindusthan National Glass,

2346

in catridge heeter watts =110, 260 v , i checked in multimeeter meeter shows 50 ohms but oms law r=v square /w 260*260=67600, and 67600/110=614.5 ohms how to caluclate exact ohms in heetre s

2 4022

What will happen when we will connect lamp in between phase and earth.

3 5237

function of apfc pannel

3 5127

Where is the best place to mount distribution panel in a house.

Wantro Technical Services,

2030

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Un-Answered Questions { Electrical Engineering }

75 kw motor take 45 amp in no load delta in star 10 amp but in load it will take 160 amp but IR velue of winding above 500 at 1kw ph to earth and ph to ph. what problem it should be?

3677

we have 3 single phase transformers. how will we generate 6 supply from 3 phase supply input

2072

How to prepare electrical preventive maintenance plan & shedule of machine tools in manufacturing unit.

2125

A 3-phase IM is supplied from 50 Hz system. It runs at speed of 1440 rpm and slip equal to 4 %. Calculate number of pole pairs. A 1 B 6 C 2 D 3

1979

WHAT R THE SAFETIES IN A HIGH TENSION PANEL N LOW TENSION PANEL. ALSO WAT SAFETIES R THERE IN A 200 KVA TRANSFORMER?

2219

Is potential difference materials property ..? if yes tnen how.. explain brifly.

2001

Is any AC drive(VFD) had a feature of DC injection braking? if available please mention the detail. i.e drive can supply braking torque when the motor in idle state.

2103

Thermal withstand capability under full short circuit conditions, in terms of number of times of occurrence of short circuit and corresponding anticipated percentage reduction in transformer life.

2403

What is time invariant system?

1115

Explain The Application Of Storage Batteries?

1108

What is mason's gain formula?

1238

Why we use auxillary relay ? what is function of differential relay, directional o/c relay?

2131

What is the difference between isolators and electrical circuit breakers?

1124

Dear Respected sir how to test ABB REX521 protection relay by relay tester.

2701

What can you contribute to the progress of our Company as an employee if you are selected?

5370

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