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

Electrical Engineering Interview Questions

Questions Answers Views Company eMail

Basic philosophy of applying 3P tripping for uptill 132KV switchyards & for 132KV & above 1P/3P tripping is used.

L&T,

1 4320

Is it necessary to seperate the DG earth grid with Electricity Board earth grid for protecting the DG set. if yes why?

BARC,

2 4812

Isi standard of lux level required / to be maitained in different working place general & in textaile industry.

1 7138

why breather cap filled with oil?

7 19312

what is the ambient temperature of transformer oil & winding?

Reddy Labs,

2 8587

Why dose an electric meter record KVA when there is no load on a 500 KVA transformer

1 5308

how is working d.c amps meter?how to connect the dc ammeter inthe circuite?

2 6829

which type of starter is suitable for single phase motor ?

IOCL,

11 16827

how we calculate the 30 KW 3phase electric motor current on noload

Monnet, Siemens, SSR, Supermac Industries,

23 153312

What is harmonics and how the 1st,2nd,3rd etc harmonic levels

2 7920

How the CT and PT ratings are calculated

5 18914

expansion of rccb

3 7631

Why do power lines not short out when they fall into water?

2003

In UPS what does 600va reffer to?

4 38215

How to test Power Transfomer vector group?

Bhel,

1 2941

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Un-Answered Questions { Electrical Engineering }

What the formula for calculating no.of earthings & size of earth strip for 100mX90m shop.

2365

What is the magnetic field (coil DC ) of Turbo Expander?

2073

HOW TO CALCULATE THE HEAT AND LOAD OF LT-SUBSTATION WHICH CONTAINS 2*1MVA TRANSFORMERS,LT-SWITCH BOARD,MLDB,ACB,BUSBAR,ETC,......?

2097

What is synchro?

1170

What is meant by reverse polarity and how it can be fixed?

1265

What is a DC series motor?

1239

What is the automatic voltage regulator with servomotor?

2035

How to confirm the Phase shifting Transformer VECTOR GROUP relation , as below ZNy11.45d10.45-ZNYy0.15d11.15

3265

what do you mean by plant earthing system.

2068

what happen when increase or decrease size of lamp,light.glass.

1915

What are Contactors? How they works and what its highest rating?

2143

how to calculate regulation constants for over head lines? and what are the regulation constant for raccoon conductor at different voltage level and different P.F?

1973

Transformer diagram mention each parts ?

2041

What are the classifications of oscillators?

1084

1.What will be stored in online ups EPROM IC?

2053

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