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 4800

why voltage swells and dips???

3 5095

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

2057

why and how fault current flows through ground?

1 4330

What facility we get after CT secondary earthing and how?

Reliance,

2195

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

Energia, L&T, Sail,

8 19405

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

3 4833

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

JSW,

2 10503

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

Century Rayon, Mechanical,

2132

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

TATA,

2452

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

Century Rayon, Emco, Tailor Solution,

2362

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

2 4599

what is difference betwen genrator and alternator?

Tanfac,

3 5776

what is difference between fuse and breaker?

ABB,

6 10123

why we are discharging h.t supply during shutdown time

1 4069

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Un-Answered Questions { Electrical Engineering }

Hello sir, pls send me hpcl technical test papers .i am. Appearing for the exam.

2685

Differentiate between voltage and current feedback in amplifiers?

1072

What is the function of retrip in busbar?

1463

what happend to DC shunt motor if its field winding insulation becomes slightly weak? will that motor can run on full load or not explain in detail. thanks

1614

how to calculate slip ring induction motor stator and rotor currents??

2222

For small size, high frequency coils, the most common core material is- a. )Air b. )Ferrite c.) Powdered ion d.) Steel

2942

what type questions asked in hp cl

1800

what is the difference between changer, converter and transformer?

1465

how the synchronizing is obtained at bus couplers in grid substation? (because there we cannot change the frequency in one of transmission lines like in generator synchronization)

2315

our factory is going under construction mean time transformer 1000 kva 2 nos &load break swithch 12 kv & 4 nos 750 kva 2 nos & 380 kva 2 nos generator to be errcted.how to arrange earth pits &how to earth connect & neutral pit how to calculate in earth bit size.

2068

Is there any type of starter for DC motor other than two point,Three point and Four point starters?

1991

How wire size can define in electrical wiring? What is the ratio?

2258

What is float cum boost charging system?

2011

How to identify the start and end of 3phase 12 lead motor if U1, U2, etc numberings are lost or erased.

2105

What is routh hurwitz stability criterion?

1135

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