Electrical Engineering Interview Questions
Questions Answers Views Company eMail

What is Faraday's law

170

What is the role of the 50 STUB protection at a GIS 400KV substation with SIEMENS protection relays?

150

In a power conditoining unit (inverter) of a solar plant when we measure the d.c. current fed by different strings of solar plates to inverter, the current in the negative wire is less almost by 1 ampere to the current in its positive wire say current in positive wire 5 A , then current in negative wire of the same string is 4 A. Since the current entering should be equal to current leaving then why the current is noticably less in negative wire.

176




What is trip and closing coil in cb? Why need of them

127

what is the mechanical safety of DG ?

147

Please, if 1kw is equal to 1.25kva; how then do I know how many kva in 7.5kw?

140

We are planning to synchronized DG's with our captive plant in the event of black start of plant, but before sync we checked voltage of DG with our plant voltage and it varies from 5 V to 450 V. So in this condition how we can sync DG with plant ?

138

Two electric lamps 40 W, 220 V each are connected in series across 220 V. What is the power consumed by the connection?

133




what is the IPC ? & what the uses ?

Bhel,

104

Why 9KV surge arrester having 7.65KV of MCOV?

116

How do we calculate over and under frequency tolerance from generator data?

DPS,

116

CT Ratio of a energy meter connection is Red Phase : 100/5A, yello Phase : 50/5A & Blue phase : 100/5 A what is the overall Multiplication factor

157

I use 20 nos led tube 4feet, in pathway 100mtr approximate, so what size cable i use for lighting

Oman Cables Industry SAOG,

156

Why the earth to phase voltage is high 250 compare to other two phases

128

What is the difference between security constraint unit commitment and security constraint optimal power flow?

College School Exams Tests,

170


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Un-Answered Questions { Electrical Engineering }

what is mean by restructuring power system?

551


Difference between RCCB, RCBO and ELMCB.

1608


Y phase plates are used in transmission line??? what is there need???

1421


1.dg on load alarm/stop alarm... 2.dg on load. piu alarm alarm kaise chek krte hai

431


what happen when we add mentos in cold drink?& why?

667






How colour picturetube works & how many year it will works.

610


What safety followup during kWh meter isolation

656


1.Z transform always lies around ? a) origin b) pole c) zero d) z=1. Multiples Mcqs which is bother me can’t find answers on internet. Some help required with little explanation . Note: this is not homework or related to any test. Thanks

776


how to select energy meter? have any calculation?

1377


how to make an earthing certificate

924


How to Calculate KA Rating of Main LT Panel

173


No load tap changing transformer working

342


What are the protections for safe running of electric generator?

870


what is the function of choke in the flourcent tube lights and why the colour is in white mostly in flourcent tube lights

619


Difference between control junction box (cjb) and power junction box(pjb)?

291