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

Electrical Engineering Interview Questions

Questions Answers Views Company eMail

where any change in supply line due to the incipient faults in three phase induction motor

ABB,

2 4921

why voltage swells and dips???

3 5242

sourse is 66 KV / 350 MVA, transfarmer is 1000 KVA 6.6 / 0.415 kv, iF fault is 28.75 MVA on 0.415 KV Bus then calculat the Transfarmer Impidance

2107

why and how fault current flows through ground?

1 4430

What facility we get after CT secondary earthing and how?

Reliance,

2269

Why indian power system in 11kv,22kv,33kv,66kv,110kv,220kv ? 2) Why ups required dedicated earth?

Energia, L&T, Sail,

8 19683

In our generating power station we get electric shock in the battery bank, what will be the reason?

3 4995

What should be the conservator minimum oil level required in 2 mva transformer

JSW,

2 10630

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

Century Rayon, Mechanical,

2211

what is difference between earthingpits,earthing grid & earthing mess?

TATA,

2528

what is diff. between earthing grid,earthing mess, earting grid?

Century Rayon, Emco, Tailor Solution,

2420

Why? We r used 50sq. mm. And above size cable in 3.5 core and below size are used in 4core

2 4716

what is difference betwen genrator and alternator?

Tanfac,

3 5935

what is difference between fuse and breaker?

ABB,

6 10433

why we are discharging h.t supply during shutdown time

1 4169

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Un-Answered Questions { Electrical Engineering }

I have iti elec, 1st aid, and 5 yrs experience in 7.5 mw power plant. Am i eligeble for 11kv license in telangana state..when, how to apply for that.?

2331

Define gain margin?

1196

my b-tech percentage is 50%. what answer will satisfy the hr ?

2128

What is the difference between indoor and outdoor transformer

5941

How many size of cable required for a 300m long and 30kw inductive lode

1320

what is the chemical name and formula of refrigarent R-134a.

2315

What do you mean by the zone of protection?

1109

How to know Resistance and Reactance value of main and aux winding of single phase capacitor start capacitor run induction motor to find capacitor value?

2055

What is dynamo function in DG sets and draw block diagram?

2065

1.what is the difference between transformer differential and busbar differential.2)why we are using 2 slope for trafo diif and 1 slope for busbar diff.3)what is the purpose of metrosil and stabilizing resistor in high impedance relay circuit.4)how metrosil reduce the peak volage.5)what is the funtion of stabilizing resistor

4887

In parallel operation time both NGR’s close or not close if both close what will happen

3749

how ups works ? various parts of ups and working principle

2032

What is stepper motor?

1313

what is the use of power transformer in GSS.

2514

impliment (AB)`+C to transistor representation

1851

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