Electrical Engineering Interview Questions
Questions Answers Views Company eMail

Do I need a special Transformer to put 240 VAC 3 phase into it and and get 480 VAC 3 phase out of it to run a machine? Or, do I just use an ordinary step down transformer and step up the voltage? Thanks

2 2594

what is the principle of vvvf drive motor

3 25174

We know that, in case if there is a faulty insulation,or sc, the current is bypassed to earth through the earth wire that has low resistance.Actually, what will happen to that current that flows through gnd?In that case,if we come in contact with that faulty appliance, wont that current flow through us as we form a closed path by standing in gnd?Is grounding a safety measure?

3 3295




Hai, I am from EEE branch.On feb 17 iam going to write an Exam for hindustan petrolium corporation Ltd.So plz send me the written exam pattern/Q's/interview questions.please mail to yuva_polisetti@yahoo.co.in

622

why we step down voltage level from 33kv to 11kv and 11kv to 415v.Instead we can step down voltage from 33kv to 415v directly using single transformer.

Adani, HCL, Central Electricals, Electrical, ABB,

12 51542

sir, I am from EEE branch.On feb 17 iam going to write an Exam for hindustan petrolium corporation Ltd.So plz send me the written exam pattern/Q's/interview questions.please mail to eee_dharmendra@yahoo.com

624

what do you mean by 1 ton in AC`s

Bhel, Bosch, ITC Infotech,

36 89514

how can you prove that in CE configuration a transistor has 180 degree phase shifted output

Bhel,

5 10755




hi frenz,its aswathy.i hve aplied for the hpcl test on feb,pls send the test patern & the placement papers as soon as possible. mail-id :kjaswathy@gmail.com

543

HAI SENT HPCL APTITUDE QUESTION PAPER, MY EMAIL ID IS angus_eee04@rediffmail.com,angus_eee04@yahoo.com

774

How can we measure and monitor critical performance parameters of Diesel Generator Sets, both electrical and engine ?

Cologicx Systems,

3 6810

hi frnds.....anyone get any reply from HPCL. I HAVN'T.....B,COS written will b on FEB 17 th.

HPCL,

1 2607

what is the maximum genarating in india?

17 28764

WHAT IS THE DIFFERENCE BETWEEN RESISANTANCE AND IMPEDANCE IF IMPEDANCE IS MORE THAN RESISTANCE AT SAME VOLTAGE CAN WE HAVE RELATION DERIEVED BETWEEN THEM

4 6401

How to calculate D.C load current?

3 26420


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Un-Answered Questions { Electrical Engineering }

tell me some type of questions throught which i can prepare for exam and do my best

800


Can we use shunt trip coil instead of trip coil with protection relay for protection?

412


What is the use of Surge Capacitor in LAVT?

10116


Can you explain about pole discrepancy scheme

810


Shall I use 40A semiconductor Fuses in 32 A SFU ? Frame size is same. What Happen if Fuses burn on SFU?

723






A 7 storey building has a floor area of 35,000sq.ft on each storey. On the ground floor 11KV electrical sub-station is to be erected. A load of 3kw for every 400sq.ft (p.f is 0.8) is proposed for each floor. fire pump 7.5hp, water pump 5hp, lift 2 nos, each 10hp and 20shop load of each shop is 5kw. calculate a. load each floor b. total load of building c. L.T feeders for aech floor and from transformer to main. d. distribution diagram e. capacity of sub-station/capacitor bank f. line diagram

1149


i need about 10 years of GATE solved papers in pdf format and even mock tests toooo

408


how to calculate the no load current in transformer?

1031


why incomer bay is required before transformer bay if there are more than 1 nos. of transformer bay.

1462


what is the difference between gas group b and gas group c electrical equipment construction wise?

619


Meter p.t. ratio= 3×230/400 , c.t.ratio = 3×1 (2) A what is m.f.

416


DG SET BLOCK DIGRAM

870


IF DISTANCE IS 100METERS B/W AMP.METER AND CURRENT TRANSFORMER WHAT WILL BE AFFECT IN ACCURACY .METER CAN SHOWING ACCURATE CURRENT OR NOT IF NOT WHAT CAN I DO TO GET 100% ACCURACY.

620


which pump used in WTP explain the function of VFD how to dtermine capacitorbank of capacity one plant

643


we have earthmat at 110KV substation.we would like to take earth resistance.b some says that by connecting earth megger terminals (C1,P1) at middile point of earthmat (at riser) will cause voltage gradient at other earthmat nods and dont get exat earth resistance.when connecting at end nods will get exat value . is it correct .please explain

887