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Electrical Engineering Interview Questions
Questions Answers Views Company eMail

On what principle reluctance motors work?

1 2684

What is the difference between magnetic loading and electric loading of a machine?

2 33297

How the size of electic machine vary with the sped? Between slow and fast running machines of equal ratings, which one is more economical to design?

1 2155

what is the relation between frequency and inductive reactance in a d.c supply?

L&T,

2 5092

Why machines are avoided to work is saturation region of B- H curve?

3 3487

Why different values of B’s (magnetic flux density) are chosen for DC machines and Induction Motors?

1 1941

How the output,losses and temperature of machines varies with linear dimension?

1 2391

Why air gap in rotating machines should be small?

3 5569

Why rotating machines are not allowed to run near critical speed region?

2 4711

From stability point of view,What(higher/lower) should be the value of inertia constant of rotating machines?

1 2426

how to reduce humming noise in transformer?

3 7700

There are two nos of 33Kv/11Kv 5MVA transformers conecting through HT cable from substation having metering at substation itself.One transformer used at a time another remains stand by.Further 11 nos of 11Kv/440V transformers are attached on it and each transformer is having its own Power factor correction panel.Now one 33/11Kv transformer at no load condition/Stand by condition is having power factor in leading side upto 0.21 and while when another tranformer at same situation have power factor in lagging 0.42. Now one thing is clear that transformer one is having 1.5 Km long 33kv cable due to that PF goes in leading side and another is having only 250 mtr length remains him lagging. Now i want to know that how i can maintain the Power factor at no load/ stand by position though both are behaving in seperate manner.

1 5370

Why oil preferred over the air as a cooling medium for high rated transformer?

1 2977

What is emperical relation.Name few of them which are used in electriacl engineering?

1 2526

In the ACB breaker capacity is 2000Amp but this each phase taken 1250 But total beldibg load is 600amp or 700amp watt is the problem

1028


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Un-Answered Questions { Electrical Engineering }

How may I get the maximum current capacity for a particullar size Alluminum or Copper cable if there is compulsion to use?

977


what are the tests comes under the type test, what tests comes under routine tests.

636


What are the advantages of stationary armature and rotating field system?

264


Why Neutral Isolation is required?

1395


Who are the manufacturer for Nitrogen based Fire Protectio/explosion prevention for Oil Filled Transformers? India and international both?

1016






What is rotating magnetic field?Discuss elaborately.

1739


why would amp draw on neutral wire be as much as amp draw on the hot leg.

1181


How does a television work?

1343


Explain M Var? Which types of problem occurs when reactive power increase at the time of full load of plant and at the time of synchronize of plant?

959


On what basis the the size of Lightning arrester for buildings are selected ?

710


PLEASE SEND ME NTPC RELATED INFORMATION LIKE WHICH TOPICS HAV MORE SCOPE,BOOKS TO READ,CUT OFF...PLEASE.mail at thiru.1203@gmail.com

1236


What is quadrantal symmetry?

374


Differentiate between Zero and Negative sequence current

1060


What is the Good Earth resistance value of G.I & Cu. Chemical Earthing & Normal Pipe Earthing?

1387


Define piezo-electric effect?

229