Electrical Engineering Interview Questions
Questions Answers Views Company eMail

What is Faraday's law

195

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

196

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.

208




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

159

what is the mechanical safety of DG ?

199

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

170

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 ?

160

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

168




what is the IPC ? & what the uses ?

Bhel,

147

Why 9KV surge arrester having 7.65KV of MCOV?

158

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

DPS,

145

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

189

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

Oman Cables Industry SAOG,

186

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

154

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

College School Exams Tests,

208


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Un-Answered Questions { Electrical Engineering }

I want single line diagram for AMF & DG syncronizing panel

4925


what is high - pot test. what's its use?????

715


I want to design a heating coil of 80/20 nicrome for 3.5KW please give me the calculations choosing for physical dimensions assume coil voltage will be 110V AC assume necessary conditions

339


what is conductor copnstant of ab cable

478


Which thing is maximum in RLC circuit at resonance a)power consumption b)inductive current c)capacitive voltage

422






How can I model an open-delta ground transformer for a network supplied by 4 unit GTG and power transformer in ETAP?

12319


Compare salient pole and cylindrical rotor machines.

633


in electrical control panel. how can i choose the cable rating. (example - 11kw motor, 18-25A mpcb}

1578


How to design the earth grid for lightning protection in an industry

2233


What is line resistance of cable & how it can be measured ?

167


why single CT used in DOL starter power circuit?

1027


i have seen one 8.4 MW synchronous motor in a plant located in bellary it is fixed with brushless rotary rectifier ,anybody can explain its start up principle

716


hi i will D.E.E.E.is completed pls send rrb diploma old qustion papaer sent in my e mail. i.d.

1006


What is effect on in zone and out zone fault if CT chosen for phase side is Vk/2<5mA and Neutral side is Vk/2<15mA on REF protection of Transformer

1038


what is meant by motor startup supervision & motor load jam protection ?

3577