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Electrical Engineering Interview Questions
Questions Answers Views Company eMail

What is the effect on Power factor and capacitor when your company load is more than 70 % of welding transformer

915

How to protect a Dosing pumps/any sensitive equipment (single phase) from surge protection inside a food factory.

890

specific difference of ICT&Auto Transformer

TNEB Tamil Nadu Electricity Board,

880

How to protect sensitive loads such as Dosing pumps inside a factory from voltage surge/voltage fluctuation.

900

Multi-step core is used in transformer to: A) Increase the output B) Decrease the cost of core material C) Decrease the cost of copper D) Increase the efficiency

Accenture,

1 5223

Does outdoor isolator loose connection cause short circuit current in that circuit? if yes then how ??

802

What is sunrise meeting ?

KSEB,

1 1315

List out the the types of Mounting Light fixture?

HLL,

822

i have a 4 Mva transformer 34.5 kv / 480-277 v and i used 2 parallel 3200 amp bus duct for the secondary feeder using 3 ply of bus bar ( 3/8" x 5" ) as a common where the flexible link terminated and 6300 amps breaker for the main, the lower bus duct reaches 70 degrees and the upper bus duct reaches 55 degrees when i used thermal scanner. why the temperature is not balance when the load reaches 3600 amps.

SCM,

960

how can i find cable size from current rating?

Sintex,

937

can anybody find out the result. I am lil bit confused about my equation.

Student,

1 1348

I have a reading off 1.5ohms at my mem my main c/b is rated at 40/6 amps in a domestic house and i was told to change it to a b curve c/b is this ok

805

what is the basic principle of operating of a television camera tube?

Student,

2672

what is the basic principle of TV camera?

BZU,

1069

what happens if dc supply is given and the remedies for it.

869


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Un-Answered Questions { Electrical Engineering }

working principle of AC Servo Motor with its construction

7886


what will happen if the prime mover on the field excitation of the on-coming generator fails?Explain.

4517


Why 30kw 40 hp 4 pole 3ph induction motor over heated?any steps on reduction in heat?

778


A powerplant has 8 gensets operating in grid parallel mode. In one genset sometimes there is pf variation and kvar variation. The plant operates in pf mode. When this variation is observed the load is stable, voltage is also stable, freq and genset speed is also stable. How will you check the functioning of pf card. What shall be the ideal output vdc of the pfc, from there it is input to AVR?

1349


I meggared my 2c*70 sq mm AL AR XLPE cable. its one end show 50 M ohm . is my cable is safe for laying. I have only one phase and neutral.

790






Dear All, I am new in construction company , my boss ask a question at time of interview , If we have 60MW generation and Single Power Transformer step-up we have. if CMR 50/60MVA , ONAN, ONAF respectively , is it sufficient or not ? for that much power to transfer,

799


DERIVE AN EXPREION FOR MAXIMUM POER TRANSMISSION, WHAT ARE ITS APPLICATIONS.

1132


Which standard we are following earthing resistance test

567


could an induction motor be used for regenerative braking in electric-train control? in this type of application would some scheme have to be devised to obtain low synchronous speeds while braking? would induction-motor drive, therefore, be suitable for passenger service?

1187


can we use NPT glands in LT panel

896


why should small green grass ans small plant should not be there inside the transformer Yard in the factories

803


Hoe do calculate the Cable size for Amps rating ?

1271


star delta starter contorl circuit... drawing..

1265


What are the parts in a inverter?

1163


HOW TO CALCULATE HV TEST VOLTAGE FOR ELECTRICAL EQPT.

1278