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Electrical Engineering Interview Questions
Questions Answers Views Company eMail

What is the effect on 3phase induction motor if current setting knob of DOL kept at minimum current?

2673

Why the high starting current does not harm the low capacity induction motor?

1 3586

Transformer how to maintaince a check b check c check d check

DIC India,

1057

Igfet is a

778

How Self works in DG set

906

how is control wiring coding is done in a CRP panel ?

Genus, Havells, Hindustan Power Projects,

1074

What is ideal IR values for ground and neutral.

Hindustan Power Projects,

831

Hi, My question is our total motor load is 55 kw.so what cable size required for main supply. Please reply

Maryam Enterprises,

1 1342

i have ht transformer of 142 kva with air cooled facility,having secondary voltage 7850volt, and secondary connected full way bridge rectifier .i faced the problem repeatedly that transformer one coil and rectifier diode of two phase was burnt two times. i checked all the secondary ckt. no any short ckt found,then what will be the cause side

Modern Terry Towels,

2 1269

What type of changeover switch needed to run a load of five 1.5 tonn ACs.

1 1215

wish of these transformer uses oil?

FJ International,

766

how to check the continuity of a cable with a megger

Metro,

4 2731

My meter ratio is -/5 and ct ratio is 100/5 now what will be the multiplying factor and how ?

1 1158

what is surge impedance loading?

1 1147

in HT service 3ph 4 wire service Y-phase voltage shows zero . whether it is meter fault? or what be the reason ? if y-ph voltage zero ,can current is recorded? reasons for failure?

apspdcl,

860


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Un-Answered Questions { Electrical Engineering }

what is the benefit of floating our DC source? if i have two floating DC source of which 1 has a ref voltage of -21VDC and the other of -18VDC. can it be connected in parallel to share a common ref voltage? if not, how do i make both sources to be of common ref voltage? tks

1015


what is plunger and what's the use of it in motor alignment?

1550


How to protect sensitive loads such as Dosing pumps inside a factory from voltage surge/voltage fluctuation.

850


what is physical distance of isolator to VCB in 33/11kv sub stations

1237


How to calculate the phase to phase clearness of HT /// LT bus bar?????

1151






What are the transformer losses?

196


To make a basic instrumentation amplifier, it takes A One op-amp with a certain feedback arrangement B Two op-amp and seven resistors C Three op-amps and seven capacitors D Three op-amps and seven resistors

1072


Percentage losses in power generation?

2085


What will happened if the neutral of secondary of Xformer ( Star point) Note it's above KVA rated Xformer

996


Atwhat condition reverse power relay will act?

1196


What are root loci?

190


working principle a.v.r. ?

1460


what will happen when the dc supply is given to the capacitor?

584


i want bhel placement paper for electrical if anybody having pl send to my id kavitha867@myway.com immediately

1119


how to put cable sizing and cable glands size for respective cable & Cable Lug size in a DB sectors???

1152