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Electrical Engineering Interview Questions
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What are the circuit models used for analysis of medium length transmission lines? Which one is superior? Support your answer.

UPSC,

1 4948

What are the typical values of characteristic impedences of overhead line and underground cabel? Why there is so much variation?

 1 3510

Is the force acting between two parallel conductors of infinte length carrying AC of frequency 50Hz remians constant with respect of time? If not then what would be the frequency of the force acting?

1 2996

Why and which type of tertiary winding is used in most of the power transformer?

 2 4640

What is the basic difference between synchronous machine and induction machiine?

 1 4621

Can the field winding in synchronous machines be placed on stator?What is the limitation of such arrangement?

 2 4094

An alternator is started without excitation then how much voltage it will produced at strating at full rpm??

 4 5394

Why the design of electromechanical energy conversion machines is based on the medium of conversion as megnetic field not as electric field?

 2 4546

Why annealing is done on transformer core manufacturing process?

ISRO,

1 12025

What is the approximate percentage of Si content in transformer core(CRGO-Cold Rolled Grain Oriented)? Why it is kept so low?

 1 2975

What are various accuracy classes of CT(Current Transformer)

 1 4208

What are the commercial names of overhead conductors used in India?

UPSC,

3 10715

why transmission is only 3 phase and not 2 or 4 or poly phases

Infosys,

1701

what is the use of vector group in transformer. means what r the application of various vector groups?

 5 11527

What is the difference between MCCB and MCB ?

Siemens,

4 8420

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Un-Answered Questions { Electrical Engineering }

What it the purpose of parallel phasing transfomers??

1502

What are diffrent type of road taxes?

1469

what are the analog quality input for protection function?what are minimum reqiments?

1400

What descriptive information does the NEC require to be marked on all conductors?

1451

Electronic circuit

598




hi i will D.E.E.E.is completed pls send rrb diploma old qustion papaer sent in my e mail. i.d.

1842

In Air circuit breaker LSIG protection unit is used. Without fault in cables (2 runs 3Cx150Sq.mm Copper, 1Kv grade, XPLE armored cable IR value is more than 550Mohm @ 500V Megger) and load section Long time Overcurrent protection is triggers and trips the unit. We changed LSIG protection with new factory tested unit. Even then fault is persisting. Please suggest the possible causes

347

Define noise?

705

How convergengr of nr method is not dependent on selection of slack bus and how gauss siedel method depends?

1333

does a DG set has low fault level as compared to that of a transformer.If yes then why.

1516

what are the values of VRY,VYB,VBR,Vry,Vyb,Vbr,Vrn,Vyn,Vbn for Magenetic balance test of 100 KVA and 63 KVA Distribution transformer

2418

In a large office how do we calculate required number of light fittings, assuming fittings are 4x18W or 2x36W fluorescent fitting ?

1408

why need to be maintain power factor for industrial customer?

4074

What is the need for a controller?

647

why do we use spark detector inside the slip ring brush compartment 0ona slip ring induction motor?

1618

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