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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 2944

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

BARC,

2 2950

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

1 5728

why breather cap filled with oil?

7 13076

what is the ambient temperature of transformer oil & winding?

Reddy Labs,

2 6245

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

1 3983

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

2 4847

which type of starter is suitable for single phase motor ?

IOCL,

11 10839

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

Monnet, Siemens, SSR, Supermac Industries,

23 128401

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

2 6006

How the CT and PT ratings are calculated

5 15741

expansion of rccb

3 4807

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

1096

In UPS what does 600va reffer to?

4 33264

How to test Power Transfomer vector group?

Bhel,

1 1558


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Un-Answered Questions { Electrical Engineering }

what is cogging and crawling

1609


What is minimum phase system?

232


What are the different types of transformers?

248


what is difference between 9kv 5ka surge arrester and 9kv 10ka surge arrester.

876


What is the formula to find out two phase active & reactive power

1287






what is basic difference betmeen normal & flame proof motor??

1065


What is pi controller?

244


What is K-rated transformer? What is the use of it? What can be the size(pls provide calculation if possible) of K- factor transformer for 550kW,690V motor operating with drive (VFD)?

1254


How to calculate the efficiency of Turbo Generator(Alternator) in general....?

1762


In Indian Household, generally we receive 220V AC single phase supply. But AC has 2 phases, +ve & -ve. So in +ve half cycle current is flowing...so what happens in the -ve half cycle?? Please illustrate.

1223


either water sensor or flow meter,how we observe the water level, f any other equipment are in market ?

1025


What will happen if the armature resistance is in minimum position and the field resistance is in maximum position while starting the motor

544


Define peak time.

246


how did the testing of protection relays done through current injection

1277


I NEED RRB APTITUDE QUESTIONS AND MODEL PAPER,PLEASE SEND MY E-MAIL joo28_eee@yahoo.co.in

1047