Electrical Engineering Interview Questions
Questions Answers Views Company eMail

Is it reuired to use house service barcket for 31/2 core 300 Sq.mm cable,if the distance between pole & shop is around 2 mtrs only or can I hang the cable with GI support in air? upto what size of cable GI serrvice btacket is necessary?

HAL,

1 2843

What is Gnat,Ant,Rabbit &Dog overhead conductor? Please explain.

1 8695

Can I do body earthing of machine by using Cable armour or I have to run another GI wire for body earthing and how many wires I need to run. Is there any rule for this. eartnig

HAL,

3 4688

can we use existing 6300V alternator for generating 6600V by increasing excitation,what are advantages & disadvantages to alternator & motors of 6600V.

GMR,

1 3556

can we charge 3 ph power transformer delta-star wound with neutral grounded 6.6kV/415V from secondary side(415V) but with primary(6.6kV) open by dg,what are the disadvantages or losses.

1 2475

why the transformer connected like STAR- STAR, DELTA- DELTA, STAR- DELTA, DELTA-STAR ...? why these connections ,,, explain the advantages these connections?

2601

what is the diff between VCB & ABCB breaker in substaions? explain the operating priciples of VCB & ABCB

1 5529

explain the operating principles of CVT & RVT

2 7476

For a certain load i need 100kw load ,In that case what rating mccb should i use?

5 10980

What are protections for dty type transformers

1386

What is Dry type transformer.How it works

Vatika,

6 14593

Where the Dry type tranformers are used.

5 5848

WHat is the general checks required for Dry type transformers

1659

what is the difference between ACTIVE POWER and REACTIVE POWER.I WANT CLEAR ANSEWER.

8 11226

how we can find out the speed of fan without using any measuring instrument

2 4073


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Un-Answered Questions { Electrical Engineering }

1)we have 1000 cfm Blower,Dia-1Mtr,Velocity of air 94 m/s 2)We have Natural Air velocity 94m/s 3If i Put Wind Mill in natural air ,speed is 94m/s Then it will generate Assume 100kw 4)If i put same wind mill across the Blower,air speed is same 94m/s now the Question is Will it generate 100 kw?

1524


How to checked frequency drive output voltages?

697


can we use engine degreaser for electrical motors?

1303


How to calculate the multiplying factor for energy meter with ct ratio given

1547


what is the difference between surge protection capacitor and surge arrestor

1822






We have 110Vac ,10A ac supply which is converted into 110VDC & How much DC current? which factor is reqired for dc current calulation?

4497


Define open loop control system.

689


Sir, I have applied for the of Jr.engineer(Electrical & Electronics) & ASST. LOCO PILOT at ALL RRB BOARDS. please send me all RRB Boards solved papers in the year of 2001 tO till date. i requested send me the papers to my id as soon as possible (jet_0991@yahoo.com). (This is very urgent) Thank You,

1408


What are the basic elements used for modeling mechanical rotational system?

625


What is the function of NGR for the parallel operation of alternator? whats happen when different rating of alternator are running with parallel?

2500


what is EIB lighting control system? what is the advantages of this system?

3212


How one can check the MAIN of a house wiring ?

1465


What is process of anneling transformer core

1471


Why is it prefer to initiate circuit breaker failure by "86" lockout relay not by "94" tripping relay ?!

1312


I want to calculate how much capacitor we connect to maintain the unity power factor? Is there any formula? Pls give me the answer

1455