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

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 48825

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

Sarhad University,

12 29096

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

Sony, VBB,

1 10483

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

APGenco, National Engineering Industries, Practical Viva Questions,

5 25114

send me the upsc conventional papers of 2006

Juniper Networks, Siemens,

1 4087

what is cogging and crawling

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

20 86428

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

2 6888

What is power factof?

RRB,

21 28918

What is auto transformer?

ABC, Transformers and Electricals, US Consulate,

28 63242

Why donot sleep below the tree for night time?

12 29183

could mail me the question papers for the test.

ONGC,

1 4309

What is Cement

ACC, L&T, Reliance Cement,

11 21518

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 124965

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

44 69852

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 220199

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Un-Answered Questions { Electrical Engineering }

A well system is when , no. of bus bar is less or more. Tell me the concept of it.

1978

Whether IP65 enclosure box blocks ventilation if driver for LED have to enclosed inside IP65 box

2149

State kirchoff voltage law?

1174

Is it possible to use a S1 duty class motor for crane application (S4)? If not, why?

2489

how to check regenerative load in drived motor

2297

How To Convert Apparent Into Real Power Without Knowing Reactive Power?

1831

Is there any question in the name of Static Switch in UPS??

2030

For an induction motor wat is the loading/unloading cycle duration or interms of L/UL ratio/ percentage?

2179

When a single pase capacitor run motor- run on 230vac and Case(1)run with 8 Mfd 250 vac.capacitor , Case( 2) run with 8 Mfd 400vac capacitor. What is difference between both case regarding power ,efficiency etc?

2104

What is the selection process of breakers. Can any one please give a formulation on same?

2194

Describe the test procedure to determine the vector group

2232

What is lifting power for 1 wb/m2 and 1 A magnet?

2297

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

2458

why the arc welding machines require parallel earthing systems? ie why each machines are connected to earth pit by separate wires during earthing? wats it adavantages?

2263

What is the abbreviation of NGT panel

2081

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