Electrical Engineering Interview Questions
Questions Answers Views Company eMail

How To increase Knowledge Of boliler regarding To Only Electrical Field..

164

What is the difference between PLC and Embeded system

119

How capacitor connect in 3 phase supply???

L&T,

1 234




PAC and simple Ac different

88

Why High voltage are generate noise ?

74

what is KA rating and how can we choose switchgears on applications

100

Why can't we parallel Voltage transformer secondary circuits?

85

Why can't we parallel the secondary circuits of two voltage transformers?

117




we have 3.5MVA-11/6KV transformer. how can we calculate earth fault current and NGR calculation?

IGC,

123

If one ct is reversely connected in Y system what will effect in kwh and kvarh meter?

1 203

Explain about how is it working Earth fault'relay and wahts the resistance value of earth bed

137

Earth has zero potential then what would be the neutral potential ?

JLL,

97

What is the formula for selecting the cabels according to load? How to calculate what sq.mm cabel to be used?

111

How to select batteries required for ups and the inverter if we Known load? And how AH is selected of battery?

Vodafone,

84

What is the maximum and minimum rating of UPS?

Indiabulls,

101


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Un-Answered Questions { Electrical Engineering }

Which test will be more severe for VCB?

1369


how current is reverse from its normal direction during the fault?

1135


If mutual flux is 1.2wb & power factor is 0.8 lag , then what is the Useful flux of a transformer?

1546


HOW WORK HEAT PLATE EXCHANGER

648


upto how much low RPM we will run the commercial motor which is run through VFD without any problem occurs in motor.Motor rating Duty is S1 & RPM is 1400.

745






What do you mean by cogeneration? What its working principle?

1833


why booster transformer is used in sumpners test conducted on transformer????

1913


Who are the manufactures those manufacturing 3Cx2.5sqmm FRLS cables. I heard about FRLS technology adopted only in wires useful for wirings

746


if i am in front of transmission line how to know that current direction without any equipment

340


What is the difference between Delta & Wye windings?

754


How to find ampere on ht side for selection of cable size ???

497


Can RCD's used to protect the VVVF drive if not why.

872


What is difference between Over Current & Earth Fault protection?

738


What is the real function of reverse power relay in generator panel while syncronising?

646


what size steel armoured cable is required to support 1500kva capacity. would 70mm squared be enough or would I need 90 or 120mm squared 3c plus earth

177