Electrical Engineering Interview Questions
Questions Answers Views Company eMail

How are calculated the aluminium busbar cross section area?

2 6158

Are same transformer be employed for step up and step down services?

3 2962

On what basis primary and secondary of a transformer is chosen?

2 2426




how to male a d.c bettery to blow a 230v bulb?

1 2141

Can a 50-Hz designed transformer be used at 60-Hz system? Is the same remains true, when a 60-Hz designed transformer be used at 50-Hz system? Consider only frequency variation. The voltage remains as rated value in all cases. Justify the answer.

2 4958

How to protect the water pump by no load running.

Cushman Wakefield,

9 6561

Hello, im taking an introduction to PLC..and i'm having a hard time on creating a program for 2 lamps blinking alternately with this button characteristics: 1.) One push button (starts upon pressing) 2.) Same push button (when pressed again, will pause the system) 3.) Same push button (when pressed again, will continue the paused system) 4.) Same push button (when pressed within 2 seconds, will shut off the system) Pls..i know this is just a simple problem for you guys..

2 1661

In n high voltage 11kv system What happened if 1 of CT cable (IDMT) loose.Will e/f or o/c trip.please explain detail

1 2102




In UPFC,What is the need for Dc link ( DC capatior)?

1 2669

Can a transformer designed for a particular voltage and frequency rating be used for different set of mentioned ratings? Assume that the winding does not get burnt because of overheating at higher voltage. If yes, then under which constraint it is possible?

1 1225

why microprocessors are named as 8085 ,8086 etc? what's the reason for this???

HCL, Bhel,

12 25912

what is basically a pulse transformer?

1 5378

what is relay multiplier

Bhel, Wipro, Atomic Energy Commission,

1 3302

whose motors self starting synchronous or Induction motor?give fact reason why not self starting another mother

2 2454

SSC JE ELECT.

SSC, CPWD,

1 15596


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Un-Answered Questions { Electrical Engineering }

how can i reduce sparking without stepdowning the voltage

1064


I have 4 DG set with 1500KVA rating. system breakers are 11KV & alternator are 415 Volts. Between alternator & breaker one stepup transformer used. i want to Know what is max. resistance for body earthing & 415 & 11KV V Neuteal earthing. my fault current is 14 times for 2 sec.

877


what is the significance of cabability curve of alternator

807


What is different bewteen low or high impedance busbar protection scheme

2595


What is minimum permicible value of leackage current for LT Panle when applying voltage up to 3 KV for 5 Minuits?

611


What is the purpose of stand by earth fault protection for transformer ?

534


AL=0B9H,bl=75H, ADD AL,BL AL=____________? CF________? OF___________?

457


What is Traction? 1KVA Alternator, How much urrent taken?

601


What do you mean by Stimulastion Test in Diesel Genarator / Why & when it's conducted ?

184


can indirect loading be called as phantom loading?

454


If a 3 phase induction motor is in off condition in the conveyor and rotor of the motor keeps moving with the conveyor than the resistance of windings of motor varies. why is it so ??

545


why co incidence factor considered in transformer sizing?

449


how to design coil turns ?

501


where is the need for short circuit test for 3 see is required and why? can you explain in brief with application

432


What will be electrical cost per sqft for IT building (basebuild and fitout)and for residential township?

411