New Electrical Engineering Interview Questions :: New Electrical Engineering Interview Questions en-us how to calculate neutrel current Which type of questions well asked. ? how to calulate multiplying factor if meter ratio is /5 ampere and ct what is real power and reactive power? Real power is actual power for exp heating lighting rotating and reactive power is used for excitation purposes of winding of transformer generator and motorss If Polarization index of motor 8.75 at 500volts of medium voltage 4. why generator efficiency is more in swinburnes test? how many joint can done in HT line and what is life of the joint explanation of mesh bus bars what is difference between neutral and ground wire? ground wire is where you connect diff equipment to control their potential diff at one level.this applicable to only body parts only. like a generator where engine , alternator , radiator connect with a wire to control their potential generating due Utility company give the supply to customer in KVA but bill them for The significance of power factor lies in the fact that utility companies supply customers with volt-amperes, but bill them for watts. The relationship is (watts = volts x amperes x power factor). It is clear that power factors below 1.0 require how terminal voltage increases when load is capacitive (leading pf loa What happen if in three phase 440 v , when you check voltage by test As we know in 3-phase 4-wire ckt three phase R,Y,B & N respectively if we check with tester it will glow three phase except neutral.If we check with multimeter Phase to neutral it will show 230v & phase to phase 440v .But we cannot check all how much value of resistance should connect to 15 kw, 6 pole 3 phase how can calculate resistance box for 15 kw, 6 pole, RV-230, RA-42 mo What is use of it is help ful in electrical system .....b Reactor is an inductor coil which is used during no load conditions voltages increases due to line capacitance(long distance). To reduce those increased voltages shunt reactor is used which controls or take the voltage to normal voltage level.