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Electrical Engineering Interview Questions
Questions Answers Views Company eMail

if 6 earth pit value is 1.5 ohm then what should be the number of earth pit to make the value .8 ohm

2171

Why infinite busbar has zero resistance and high mechanical inertia?

1 4034

Why the transformers making noise?

L&T,

2 8468

In Indian Railways , how the AC motor is driven? Please explain clearly starting from the overhead 25kV supply.

1 4006

In Indian Household, generally we receive 220V AC single phase supply. But AC has 2 phases, +ve & -ve. So in +ve half cycle current is flowing...so what happens in the -ve half cycle?? Please illustrate.

1981

In a 132KV Grid Station where voltage level is 132KV, here,  why the rating of Surge arrests installed 120KV ? 

1 4664

what is the best way to start a 15 KW motor for pump star-delta or direct on line ? and from how many KW i must use direct on line ?

1 3516

which has more heat effect(dc or ac)

CCEL, TATA,

4 7720

How can we prevent the (Home)inverter supply flow to the main supply line?

L&T,

1 3544

how to calculate KA rating of C.B?explain with Formula.

1 5647

what is the difference between skin effect

2221

what is the temperature rise test? explain in brief.with formula.

1 3426

What's mean HVF & HAF in Vacuum Circuit Breaker?

Gandhi Institute of Technology and Management (GITAM), Hyundai, Jayam Engineering Works,

5274

we want to feed 3 phase supply to 70 ton AC load.what will be the size of (3 phase)cable require.

BSES,

2 6127

why transformer not used to starter

1 3782


Post New Electrical Engineering Questions

Un-Answered Questions { Electrical Engineering }

how to determine ct ratio in ht vcb?

1795


What is the formula to calculate the size of Aluminium and copper cable?

1919


can any one suggest me the tilt angle of my solar pannel ?? or tell me how can i know the fix tilt angle of my solar pannel?? my cordinates are 31.503629,72.993164.

1765


State the formula for overall efficiency of thermal power station

2995


How much load can take a 16 mm aluminum cable 3 phase

1718


Whats the minimum value for I.R. that can be allowed for HT & LT alternators for operation?

4005


Why the cores of large transformers build up of circular cross section?

2247


how point on wave controller works.

2561


what is the calculation method to design core and winding of a 200kva 3phase distribution transformer?

2352


please send me previose rrb junior engineer qustion papers

2102


pls tel me the electric train traction motors name plate details like rpm,torue,voltage,amps,watts..ect..

2007


In the formula : Knee point voltage = Burden X alf / class, Please inform what is alf? regards Shashidhar M.R.

4153


how open delta PT works & what is its construction?

2202


How can we increase fuel-power ratio of any DG set?

1772


Different STANDARDS (BS, IS, IEC etc) gives different informations on CT specification. How they correspons w r t each other (i.e I mean to say BS provides "knee point voltage" but IS does not, then how can i select CT)

1934