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Electrical Engineering Interview Questions
Questions Answers Views Company eMail

in case of induction motor when overload condition or any short ckt. why stator winding burn not to be rotor winding

2 3192

when we connect a ceiling fan to a inverter's output voltage, it give some noise, why?

Luminous,

5 8923

what is mean by hormonics & surge? and it's effects?

TCS,

1 1765

what is photo voltic cell,& what are the materials associated with that?and any spcifications like volts/cm etc?

1088

what is PID control in VFD drives?

AES,

1099

hi Is there any possibilities to find out the rotation of a shaft or something else by using electromagnectic waves or by IR rays.If s then can v change the dir., of rotation of the same by remotely?& how? plz dn't any1 say "NO r CAN'T"

1162

Why should we hire you over the others waiting to be interview?

1937

What are your future plans for the company if permanently employed?

1241

what are iron and copper losses

4 14113

WHY CURRENT DECREASES WHEN VOLTAGE IS INCREASED IN A CURRENT TRANSFORMER ?

Sterling Wilson,

5 8076

in case of OC+EF relay, how the burden is divided/calculated/shared by the CTs in case of normal (healthy condition) and during fault conditions.? three coils of OC & ef coil is conected in residual connection across the three CTS.

1 2480

What is power distribution criteria for converting single phase unbalanced residential load to 3 phase star connected balance system. Does total KW converted to 3 Phase. Means Divided by root 3.

1355

the need of star to delta anddelta to star

2 3081

Do anyone know how can I calculate earthing for substation or do anyone know any software which I can use for this case

1 2622

What will happen if a dc source is given to a tubelight. Will it work or wont it work....

1026


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Un-Answered Questions { Electrical Engineering }

7- What is the Dissipation Factor and the difference between it and Insulation Resistance Test? 8- What is the task (function) of DC and AC reactors in power plant? 9- What is the task (function) of (open delta with earthed) in some types in transformers? 10- What is the base of the selection of the vector group in transformers? 11- What is the zig-zag transformer and its function by drawing in large detail? 12- What is the polarity ? 13- Why we make short between phase(R) in high side and phase (r) in low side in vector group test? Where High Side ( R ,S and T ) and Low Side ( r ,s and t ). 14- What are the time on delay and time off delay? 15- What is the vector group? 15- What is the task (function) of different types of vector group such as Dyn11 , Dd0 , YNd1,……..,?

1329


if any house we instaled a 1.5 ton ac and its phase cable of wiring is installed but netrual cable of wiring not instaed. my question is that is neutual of house(for other wiring is capable for ac load or a sepeart neutrual wiring required

1548


What are safety device in vcb and acb?

2539


What happen when change order of CT in GIS feeder?

641


2. Modify your design in question 1.a so that the circuit works according to the following function table X Y F 0 0 Clear 0 1 No Change 1 0 Parallel Loading 1 1 Count 3. Design a circuit that detects the pattern 010 in a serial input X considering: 3.a Overlapping 3.b No overlapping

1016






describe the phenomena of vacuum interruption in C.B

848


Dear Brother can u tell the proper size selection of cable & the fault level calculation of braker, busbar etc. pls mail me at azeemk30@gmail.com

976


Advantage of LT panel vs HT panel

1453


What does the term power factor shows?

196


In electrical what is earth(ground)connection, wht is the importance of it, why it is recomended to maitain below 3VAC between Neutral and earthspecially in PLC used machines?

1349


how to ctrl motor by use of ac or dc drive.plz explain evdintly

1030


IF % IMPEDANCE OF A TRANSFORMER IS INCREASED FROM 5.8% TO 8% HOW MUCH THE EFFICIENCY OF THE TRANSFORMER WILL COME DOWN?

1542


battery capacity use of made?

1559


what is cathodic protection and why it use in industries?

1291


electromechanical relay type identification example : type=tjmh t-stants for j- m- h-

1394