Electrical Engineering Interview Questions
Questions Answers Views Company eMail

why vacuume circuit breaker is not used for EHV

College School Exams Tests, Crompton Greaves,

3 6873

why there is a temperature rise at different metal to metal contact at cable lug??suppose cable is aluminium and the lug is copper,than why the temperature rise takes place??

JK Cement,

2 3958

what is formula to cal cute earth pit numbers and size of earth strip used in earthing?

1769

1.how many earth pits are required for 1000 k.w plant include substion , transformer ? 2. how many earth pits are required for 500kva generator.what is formula to calcute?

2259

How can we connect additional batteries to three phase ups? What are parameters we have to check when connecting?

1486

How to increase the backup of three phase ups?

1 2986

What are the maximum and minimum ratings of MCB,MCCB,ACB,OCB,VCB and SF6 breakers?

ABB, SK E&C, Sodexo,

2 30679

What is maximum load capacity of 800 VA inverter?

5 7057

How to caluculate number of batteries to connect a three phase ups by KVA?

1 3303

how power factor improves by connecting syncronous motor

ACC,

2 3601

is it possible to give the total load from the supply generator's maximum in practical?

2 2993

What happen in ups if phase reverse?

1648

Differene between KVA and KW.

Bharti,

6 7461

What is the difference between generator and alternator?

2 3699

What is difference between slip rings and carbon burushes?

Hyundai, IVRCL,

2 13865


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Un-Answered Questions { Electrical Engineering }

How u can give the overload setting to any motor protection relay for a HT motors with formula and Example?

1626


What is the power factor of a transformer at no load?

638


Explain about how is it working Earth fault'relay and wahts the resistance value of earth bed

1003


how many load we can take for lighting

1728


dg earth connect only in the amf panel or not why

1578






how to carry out Magnetizing Current Test on Distribution transformer and what purpose we are doing this test. why transformer rating in always in KVA ? what ispositive, negative, zero sequence impedence? How ElCB tripping if Neutral touch with ground Why AC & DC capacitor are use in UPS ? why motor rating in KW? how to syncronize two dg sets

1695


after how many spot we must chang secondry cable in portable spot welding gun?

1439


what parameters are should nessary for control technic dc drive(in rolling mills)?

1490


LET ME NOW MORE ABOUT icu and ics for circuit breaker. how we calculate the rating of circuit breaker and i c u and ics values

2408


Name of the relay of low lub oil presuure in DG sets

1569


WE HAVE THE DC RECTIFIER 1500A, INPUT VOLTAGE IS 3 PHASE. HOW TO CALICULATE THE LOAD? 3 PHASE SIDE EITHER dC SIDE. PLEASE SUGGEST ME

1380


draw vector diagram and +ve,zero sequence diagram of symmetrical three phase fault.

1463


In Power Line Communication (PLC) the wave trap is used to block communication signals from entering neighboring lines. My question is this: Why do they allow for different filtering arrangements on these wave traps? Isn't it always going to be a low pass filter since we want the power frequency to go through, and the comm signal blocked?

1451


What is the temperature PROFILE OF A FLUID W. R. T. Distance from a sphere to which it is IN CONTACT which is at constant temp.?

1599


What is a differential amplifier? Also, explain cmrr.

665