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Electrical Engineering Interview Questions
Questions Answers Views Company eMail

what is difference between AC VVVF drive & Dc VVVF drive explain their working principle?

Apollo, OPS,

13 48416

why we step up voltage for reducing the loss, even if voltage and current are proportional anr resistance remains same

Sarhad University,

12 28737

how to select earthing conductor size of amy motor/panel etc.

Sony, VBB,

1 10397

How would we calculate the no of earthing pits required for motor /panel

APGenco, National Engineering Industries, Practical Viva Questions,

5 24931

send me the upsc conventional papers of 2006

Juniper Networks, Siemens,

1 4019

what is cogging and crawling

ABB, Ashok Leyland, Bharat Bijlee, BMRCL, MN Dastur, Siemens,

20 85798

for 500mw power production how many range of transformer set in unit please reply if three transformer use .

2 6802

What is power factof?

RRB,

21 28315

What is auto transformer?

ABC, Transformers and Electricals, US Consulate,

28 62491

Why donot sleep below the tree for night time?

12 28857

could mail me the question papers for the test.

ONGC,

1 4203

What is Cement

ACC, L&T, Reliance Cement,

11 21107

why the generating voltage in India is 11kV or why is it be transmitted as multiples of 11

ACC, Bhel, ECI Engineering and Construction, NTPC, SBL, Senthur Power Services,

34 123897

why electric shock due to dc is dangerous than that of ac

44 68467

What is the difference between online ups and offline ups?

Electrical Tech, GMR, Gravity India, HCL, Indus Towers, NIT, Pyramid, Techno Electric and Engineering, UBS,

44 218901


Post New Electrical Engineering Questions

Un-Answered Questions { Electrical Engineering }

If you have an earth with pilecap then your resistance is really low. why and how?

1994


before transformer oil dielectric strenght tests are taken the oil should be allowed to settle to remove option 1 air bubbles 2 gasses 3 contamination 4 water

1658


Please tell me in DETAIL about the following 3 types of fuses or recommend me a good power system protection book or a website link ? 1.Dropout Fuse 2.Striker Fuse 3.Empulsive fuse (not sure if its impulsive or explosion fuse , sorry)

2105


why the name trunking bus PT

3068


what is the generator rating for 40 amp load of 3phase motor.?? 400v voltage of generator... plz tell me with formula its urgent...plzzz... and also tell me that this 40 amp at all phases mean 40 amp on red,40 amp on yellow,40 amp on blue...... or the total sum of that 3phase is 40 amp....

9219


Air refrigeration cycle works on the

1095


What is a DC series motor?

1238


What is measurement?

1183


11 kV line deraction check by an Engineer.

1977


Why we use auxillary relay ? what is function of differential relay, directional o/c relay?

2196


How much of the total hydro power potential has been exploited so far in india?

1116


Generation of voltage for each phase are same of a turbogenerator.Although the short circuit current flow when two phase of turbogenerator are shorted(where current can't flow without potential difference),why?

2115


when measure the core loss of three phase distribution transformer or three phase reactor loss, one phase shown negative watt loss. why??

1969


Q: How to calculate Transformer losses , tell us by Formula.

2072


What is grid collapse? what is the reason for it?

2125