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

 1688

Why infinite busbar has zero resistance and high mechanical inertia?

 1 3166

Why the transformers making noise?

L&T,

2 7642

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

 1 3176

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.

 1584

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

 1 3995

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 2799

which has more heat effect(dc or ac)

CCEL, TATA,

4 6365

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

L&T,

1 2834

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

 1 4704

what is the difference between skin effect

 1712

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

 1 2714

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

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

4717

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

BSES,

2 5153

why transformer not used to starter

 1 3111

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Un-Answered Questions { Electrical Engineering }

What is the most essential condition for the voltage build up for a d.c. Shunt generator?

659

What will happened if the neutral of the (star connected secondry) Xformer disconnected? (if its Above KVA rated one)

1693

How to calculate the Efficiency of Chiller

2837

brief notes on ammeters

1524

I have motor 1500 HP and , 4160 V , 60 HZ , then i need the rating of transformer which can feed that motor ??

1386




i am in need of AC SYNCHRONUS MOTOR 30KW. ANY ONE KNOWS THE MANUFACTURER OF SAME. ALSO MOSFET AC CONVERTER 20KVA CONT.OUTPUT.

1454

What is an ideal transformer?

638

what will happen if i connect 12 volt battery with 24 volt battery charger.

1448

v/f drive basic princeple

1985

What is the use of Surge Capacitor in LAVT?

12881

No load tap changing transformer working

1210

What kind of socket shall be provided for window type air conditioner with cooling capacity upto 18000 BTU/hr

637

What are the main advantages of bode plot?

682

during installation time of transformer and alternator which points we have to observed?

1478

WHAT ARE THE DATAS REQUIRED FOR PROTECTION AND METERING AND CONTROL AND LOGIC PREPARATION,HOW TO STUDY THE PROTECTION AND METERING?

1676

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