Electrical Engineering Interview Questions
Questions Answers Views Company eMail

What is Procedure the procedure to select CT's & PT's in 66kV and above substation?

Infotech, Vijai Electricals,

3 10364

what is extra low voltage system

3 9129

WHY EXCITATION OF SYNCHRONOUS MACHINE IS DC NOT AC

NTPC,

8 14085

Why (In India) we preferably go for +-30 deg connection of transformer? what are the advantages in this connection?

2 3733

operation of diesel generator

1531

What is Antipumping Function & If we have C.T how we find the Ratio ?

1513

How to Convert Gen KW to H.T amps ?

2 6120

at which voltage level arcing ground is occurs ??????????

TATA,

1569

why test lamp didn't glow across 500v megger?

Aurobindo,

4 6290

why we are testing cables with DC supply not with AC supply?

Aurobindo, DEWA, L&T,

9 28087

What is the Difference Between resistance and resistivity?

Sun Pharma,

2 6306

what is the different between surgearrester and lighting arrester

HPCL,

4 6705

why exterrnal C.T. protection is used even though ACB& VCB is having inbuild C.T. protection?

2 4140

what is the different bitween ETP & WTP

Square Pharma,

1 9175

According to IEC60034-14, When the vibration monitoring system required for motor Bearing. above which KW, it is required? and for what type of bearing the vibration probe is provided.

3674


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Un-Answered Questions { Electrical Engineering }

What is difference between start imitation and start interlock for 3 phase motor protection ?

1781


r we are using in gas turbine mark (5) frame (6) (made in india Bhel 1997) Ā

1283


I'm looking for a softcopy manual set for a Credence ASL- 3000. Anyone know where I can get it?

1621


WHAT ARE THE DISADTAGES OF SINGLE-WIRE-EARTH-RETURN SYSTEM USED FOR RURAL ELECTRIFICATION?

1469


Why use the vcb at high transmission system ? Why can’t use acb?

781






What is the difference between amorphous core transformer and CRGO core transformer?.

3156


How much of the total hydro power potential has been exploited so far in india?

611


Tell me the reason of connecting domestic t/f primary in star or delta,and also secondary side.

1531


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

1020


what is the safety of voltage power transformer(2250KVA0

1541


Difference between On Line capacitor and Station Type capacitor.

1604


WHAT KIND OF LIGHTENING PROTECTION SCHEMS CAN BE ADOPTED FOR THE FLAT ROOF OF BIG DIMENSION.

1624


What is the rating of a circuit breaker needed for 300 kv load in 33KV supply line of 33/415 transformer ? Whether 800/1200 amp vaccum circuit breaker can perform for a 33 KV line in input in 415 volt in output of the transformer ?

1238


what is reactive power?, why its measured in VA ? is it transient behavior of system?

1784


What do you mean by turns ratio of instrument transformer?

612