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 4035

why voltage swells and dips???

3 4223

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

1654

why and how fault current flows through ground?

1 3658

What facility we get after CT secondary earthing and how?

Reliance,

1725

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

Energia, L&T, Sail,

8 17695

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

3 3843

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

JSW,

2 9386

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

Century Rayon, Mechanical,

1632

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

TATA,

2062

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

Century Rayon, Emco, Tailor Solution,

1876

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

2 3738

what is difference betwen genrator and alternator?

Tanfac,

3 4673

what is difference between fuse and breaker?

ABB,

6 8185

why we are discharging h.t supply during shutdown time

1 3400


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Un-Answered Questions { Electrical Engineering }

What is the function of the generator exciter?

923


What are dependent sources?

666


what is acceptable leakage current for 33kv cable while doing high voltage test for cable? how to calaulate the leakage current for 33kv or any rated cable?

3451


what is a bus riser in power system and why it is used

44211


do anyone out there know where to find a compleete list on acronyms/abbreviations used in offshore electric engineering. MCB - Micro Circuit Breaker, MCCB-Mouldes Case Circuit Breaker, ELCB-Earth Lekage Circuit Breaker, ELMCB- etc.....

1572






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?

1507


In the formula : Knee point voltage = Burden X alf / class, Please inform what is alf? regards Shashidhar M.R.

3398


what should be correct gas pressures to be a 1.5 ac unite

1078


Why the efficiency of a three-phase induction is the motor is less than that of a three-phase transformer?

724


Which is the oldest hydropower plant in india?

688


what is the transformer rush current?

1590


How can we increase the capacity of Energy.?

1682


What is the difference between PS & metering CT (5p20,0.5 etc.)? Why in PS class CT only Vk is given ? Is PS class CT is more accurate than metering CT?

684


What is Plank's Law?

691


What are the main advantages of generalized error co-efficients?

645