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Electrical Engineering Interview Questions
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Can anyone please give me the parameters , formula needed to calculate the circuit breakers for building services.Thanks



What is communication? What are the different stagesin the communication process?

1 1656

What happens if you give supply to the rotor of three phase induction motor?

11 26619

why nearly all the voltage levels are in the multiples of 11 like 3.3 ,6.6 ,33 ,11 kv.....


8 9739

what are the current specifications of bus ducts ? i ve seen in IPBD bth 22000 A and 1500 A in 400 kv switchyard . why it is so??

1 2137

why nearly all voltages are in the multiples of 11?

5 7060

sir please send me previous year questions of jspl through which i could prepare myself fpr the test.

FGH, HFT, Jindal, Jindal Steel and Power, JSP, JSW, Lin Engineering,

64 40321

sir plz send some previous year questions of jspl.


working principles of a generator


3 5453

can anybody send the rrb chennai &rrb bopal question papers of 2006&2007.My exam is on 12 oct 2008.Its urgent



Polycab, VIR, XLPE,

6 84746

difference between ceiling fan

Altius Technologies, Raisoni, TCS, Uni Deritend,

24 40990

On what basis no of earth pits are to be decided either for transformers or for equipment?

BEL, Reliance,

8 18198

What is defference between earthed and unearthed cable(HT)? Which is better for under ground cabling?

1 6446

why should series motor be started with load and shunt motor should be started without load??????

7 21064

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Un-Answered Questions { Electrical Engineering }

Is it advantages of having star-delta vfd than normal star vfd , if yes why?


How will you justify IR value and Charging voltage of any motor,transformer and Cables.......???? . . . . . . . . Plz tell me any body Baljeet Singh,


what is inverter and converter


Hi everyone, I'm Lachuu, recently joined automation company as PLC Engineer. I have certain basic question, I request all big gurus and seniors to answer these question. Because this will be very helpful to me as well starters like me. How to design a control circuit (ex: pick & place - my current project) Yamaha robot PxYx series controller RCX222, using 6 cylinder double acting, plc keyence kv p16r 2 expansion unit for input and output each. How to select panel terminal mcb elcb powersupply. My main concern in some projects how to select dc power supply, mcb rcb(I came across dif bt b c d curves, but stil confusing, pls help me :-(. I would really appreciate all who are going respond to this question.


which types of relay used in acb and vcb?


What is the rating of circuit breaker needed for 300 KVA load in 33 KV supply line in a transformer of 33 KV / 415 Volt ?


What is different between Difnit time and instatous over current relay


how to test reverse power trip?


1. What is maximum permissible distance between smoke detectors ? 2. How do we decide number of smoke detectors required in a large office, warehouse, hall etc ? 3. What should be maximum height of smoke detectors ? 4. Where do we use heat detector, optical smoke detector, temperature sensitive detector ?


how we do Vector group ,magnetic balance and tap changer test in Transformer?


I need HT sphere gap calibration table. Can any body help me.


A parallel flow heat exchanger will perform better than a counter flow heat exchanger. State if the statement is true or false.


hello friends..... any one have papers or any study materials?sail ,hpcl...?


What is the type of earth fault protection used in battery? explain.


when we gave dc supply to 220v dc motor its rpm is 1200. then we gave 180v. how many rpm of its motor. gave answer with calculation at my ID....