Electrical Engineering Interview Questions
Questions Answers Views Company eMail

why do motors burn out? I understand why adding parallel loads to a power source means more current moves through the circuit, and can destroy circuit elements by overheating. What about when you have a vaccuum cleaner intake flush against a floor, a room fan sitting directly against a wall, or a power drill trying to drill through something too hard?

313

WHAT IS THE DIFFERENCE BETWEEN NUTREL AND EARTHING

Areva,

10 5443

For 300 MW plant what is the distribution voltage

6 4206

in alternator what is use of AVR ? how AVR is operating either AC or DC?

1 2576

in alternator how we can give power to rotor ? its power is AC or DC ?

5 2032

how can u determine size of the conductor by knowing the voltage level

2 2370

why HV test for cables?.why 0.7times?

Bosch, Prince Food Products,

467

What will be the output of t/f supplied with DC sourse?

2 1508

what is IP55,IP65

2 5715

what do u mean by starting torque? how it should be for a good motor? what is the relation between starting torque and power factor? What is the relation between efficiency and starting torque?

2 1465

please explain me about traction application?

2 2651

define differential current and restraining current in relays. how to calculate it by mathematically? post the formulaes.

Siemens, VPEC,

4 18222

why the rating of a transformer in kva not in kw.

9 3537

why cu losses called cu losses.

5 2966

What is the value of nuetral current in star connected load when DC is supplied to it???

1 1307


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Un-Answered Questions { Electrical Engineering }

1.what is the difference between transformer differential and busbar differential.2)why we are using 2 slope for trafo diif and 1 slope for busbar diff.3)what is the purpose of metrosil and stabilizing resistor in high impedance relay circuit.4)how metrosil reduce the peak volage.5)what is the funtion of stabilizing resistor

2498


What happen Grid EARTH plat got cut.

615


What is LMU and LMDU. in PLCC communication of 132 kv transmission line. is it possible to use only one LMU with out LMDU ?

286


what is meaning of bus riser

647


What is the RMS and DFT principle of analogue maesurments. Which way they are advangages. where which princples give optimum results.

838


Which contains in POLE ASSEMBLY of a 11KV Kirloskar-make SF6 (Model No-FP620A12)? Will u clarify with drawing?

647


WE ARE PLACE A NEW 75 KW MOTOR FOR JPF.IT IS CONNECTED IN M.C.C. WHEN WE ARE STARTING M.C.C.INCOMER IS TRIPPED.THEN WE ARE CONNECTED IN P.C.C WITH A MM30 RELAY PROTECTION THEN WE ARE STARTED MOTOR WILL RUN SMOOTHLY.

455


Anyone who can recommend an equivalent to Envirotemp FR3 of Cooper?

410


How does a system control centre in a utility plant gets the grid frequency of the electrical network (50 Hz or 60 Hz)by the SCADA system?

426


Let me know that how i calculate the alternator sub tranciant reactance and tranciant reactance.

843


when we have to use UPF wattmeter and LPF wattmeter? what is the difference between UPF and LPF wattmeter in terms of construction?

663


What happens if i apply 500V to 440V rotary Switch ?

296


what is the difference between RMS & TRUE RMS VOLTAGE

1053


how to synchronize 3 phase slip ring induction motors of different ratings.

561


when elecromagnatic waves are propogated in a wave guide?

373