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

Electrical Engineering Interview Questions

Questions Answers Views Company eMail

why the desirable efficiency for a motor is 60%, but in case of transformer, it is above 90%?

1 4085

how to calculate Amp, 2 different Amp of batteries? Example: No. of Batteries = 2 Battery voltage = 12V 1st Battery rating = 17AH 2nd battery rating = 30AH between parallel connection then output volt 12v Amp?

Bhel, LG Soft,

2 5362

Can we use droop CT in neutral in place of W phase of alternator ?

2 5513

what is the earth resistance

Micron Electricals,

4 7825

For 6600/433 distribution transformer we apply secondary side 433 volts how much voltage in primary side.

2 5123

how can calculation ate Amps for cabel. Ex-for 1sqmm wire hou many amps we can draw

Videocon,

2457

can u tell the difference between star-star transformer and delta to delta transformer.

Videocon,

3 5940

what is rating boiler

1993

expansion of rccb

Videocon,

2 5176

What is the intent of short circuit studies?

3 5470

how and why are capacitors are used to improve powerfactor?

4 6812

why do we use star-delta starter. what is its need?

6 49480

whenewher three phase supply is given to induction motors revolving/rotating field is created & rotor rotates.When the three phase supply is given to three phase transformer then revolving,/rotating field is created or not? if not why?

1 3440

how could we findout the lightning arrester failed or not in live circuit? Is there any instrument to measure the high voltage at the time of sky lighting?

1 4041

ELECtrical

Bahwan Engineering, Bhel, Electrosteel, NBCC, Qatar Airlines,

2 5283

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Un-Answered Questions { Electrical Engineering }

What is the basic principal, by which DC voltage level is increased more than the supplied AC voltage during conversion. As upto AC level it is contorrled by firing anlge but after maximum level how is it possible.Please clear picture. OR we have to supply the higher level AC?

1968

What are the types of instrument transformer?

1173

What are dcs and plc?

1106

Why syn. Generators are used for the production of electricity?

1161

What happens if the series current double?

1476

how to calculate voltage drop and followed by cable calculation?is there avail in formula?

2069

how can service sitting be setted for MCCB?Example for sittings IR (CURRENT RATING),IS(CURRENT STARTING)IO (current operating)?

1847

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

2286

why did youi choose this career?

2220

Explain different types of d.c motors? Give their applications

1127

What is the test block protection relay if any body know plz explained

1474

Difference between a pilot wire and a normal conductor?

2044

FEINGING DECREASES THE FLUX DENSITY IN THE AIR GAP. HOW?

2191

How to synchronization will be done between two DGs ?

1773

What is Diff btw Fire Alarm & VESDA System???

2401

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