Electrical Engineering Interview Questions
Questions Answers Views Company eMail

what is the difference between real and reactive power? and what is the importance of these

3 5504

PLZ EXPLAIN THE INTERLOCKING AND CONTROLLING OF CONTACTORS????HOW CAN I DO THAT?

Siemens, UPL,

2 5707

What is OLTC in transformers and what is its function?

4 6258

Is there any thumb rule for cable selection for any current rating ?

1 4857

a room heater is connected in serise with a 100w bulb.if the 100w bulb is replaced by a 40w bulb then the output of the heater is increase/decrease/remain same?

College School Exams Tests,

9 23614

What is meant by Active and reactive power?

Siemens,

5 7100

What is difference between start imitation and start interlock for 3 phase motor protection ?

Siemens,

1779

what is the principle of generator, motor, and transformer and explain the definiton of flemings left hand rule , right hand rule and ohms law

NFCL,

2 17155

What are the reasons for AVR failure in LT DGsets ?

2 6745

Why breakers not synchronized when the synchroscope is going in the anticlockwise direction?

2 4478

why phase to phase voltage is 400v while phase to neutral is 220v?

1 5990

How many earthing pits are requier to disapper the surge current of one lighting arrester.

3 4084

Is it necessary to place tap changer in secondary winding or we can use on both sides?

3 4590

What is servo motor? what is its purpose?

1579

What are the disadvantges of leading power factor

5 6425


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Un-Answered Questions { Electrical Engineering }

What is mean by hot and cold loop testing? What is the difference between them?

591


how to interlock 3 incomer-ACB,1 buscoupler ACB,... pls answer this question and if possible send me the ckt diagram..haifriends2910@gmail.com

2361


state the working principle of incondenscent tube?

1510


What is the physical significance of phase.. i.e. what is exactly the meaning in layman's language.. 1 phase, 3 phase etc ???

1666


What is the difference in calculating size of AC cables compared to calculating size of DC Cables? Usually DC Cables are larger than AC Cables although they have the same ampacity. Why is it?

1510






What are the function of different components of servo motor?

1544


What is servo motor and what are the applications of servo motor?

2250


how to calculate the distance relay faulty zone?pls explain?

1568


Can anybody please refer the best and simple book for about Protection relays and in detail of all its protection ?

1471


SUTIABLE FOR ohm's law super conductor

1508


What is the lower limit of break-down voltage of converter transformer.

1445


Why are iron cores in transformers made laminated?

648


when we have to purchase the transformer by own i.e how much load will preferred HT connection?

1185


what is value of Jin transformer

1622


Safety of on line ups

1475