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 5641

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

Siemens, UPL,

2 5838

What is OLTC in transformers and what is its function?

4 6399

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

1 4935

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 23957

What is meant by Active and reactive power?

Siemens,

5 7304

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

Siemens,

1822

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 17279

What are the reasons for AVR failure in LT DGsets ?

2 6878

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

2 4578

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

1 6076

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

3 4220

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

3 4820

What is servo motor? what is its purpose?

1633

What are the disadvantges of leading power factor

5 6687


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Un-Answered Questions { Electrical Engineering }

What is the reason behind current flow(20 A) in amain earth cable of an SMDB? Is cuurent flow(45A etc) through a neutral cable acceptable?

1539


Whether 3 phase induction motorwith 100 hp capacity , Amp 160 for which sensitive earth fault relay , type CTUM 15 can be used?

1031


what is ps impedance test

1699


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

1426


how many stairs have you climbed while you were coming

1736






What Is HO factor in power selection

1587


Mention the methods for starting an induction motor?

676


What is the formula to calculate the rating of a three phase air circuit breaker

1852


How Can I calculate for the photometrics requirements for a street lighting? Data given are: 45 units of 6 meter light pole with 150 watts metal halide lamp, 220 volts and installed in a promenade area.

1465


What are the advantages of skewing of cage rotor conductors?

757


I want to make street light with solar system ... What may I do for procedure and how much of estimation for each material ... If any one knows guide me and inform this id : aravindd7@gmail.com

1389


Hi My dear all Friends, There is a question regarding HVAC Engineering and widely used in Power Projects. Question- What is the diffrence Between REF, SEF and Differential Protection....???? Where REF - Restricted Earth Fault SEF - Senstive Earth Fault.

1758


how does a shunt reactor maintains the bus voltage???

1633


What is mean by Sensitive Earth fault & what are the effects

3816


how can we determine size of a cable by knowing the kw or current rating of a load?how can we calculate the resistance box of a slip ring motor?

1365