Electrical Engineering Interview Questions, Answers for Freshers and Experienced asked in various Company Job Interviews

Electrical Engineering Interview Questions

Questions Answers Views Company eMail

what is earth fault relay 64T, why it is used in main Incomer and neutral CT of Transformer.

3795

can we use ps class in combination with protection class in differential protection and over current protection.

1 2839

What is the output of a transformer..??

Jindal,

1 4669

What device is use for metering current at lt consumer end..??

Power Grid,

2 6462

How many devices can be connected in one zone of FACP

2321

what is interference

L&T,

1 3098

What is the maximum current carrying capacity for both copper and aluminium cables for 1sqmm?

2 4748

HOW TO CALICULATE THE LEAD ACID BATTERY AH AND HOW TO FIND THE 1.2KVA UPS BACKUP @ 1000WATTS LOAD?

2 4435

WE HAVE THE DC RECTIFIER 1500A, INPUT VOLTAGE IS 3 PHASE. HOW TO CALICULATE THE LOAD? 3 PHASE SIDE EITHER dC SIDE. PLEASE SUGGEST ME

1875

I HAVE 2 nO'S OF SYSTEMS, HOW MUCH UPS CAPACITY REQUIRED ALONG WITH 400WATTS ANOTHER LOAD? PLEASE GIVE THE FORMULA?

1 3705

can i connect wavetrap in 2 different phase in EHV line?

1850

what is ALF and ISF in current transformer?

1 12013

how can i use REF and diffrencial relay both in 1 CT core for transformer protection?

1869

can i connect REF and Differencial relay in 1 CT core for transformer protection?

1950

What is grid collapse? what is the reason for it?

2129

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Un-Answered Questions { Electrical Engineering }

diff. between tension mode & speed mode

2336

What is I to C?

2154

I HAVE A INCOMING 100A MCCB TPN 25KA, CABLE LENGHT OF 80M 70MM CABLE SIZE FROM MAIN SUBBOARD TO NEW DB.BASE ON THE FAULT LEVEL SETTING OF 45KA.I WOULD LIKE TO FIND OUT 25KA ENOUGH KA. APPRECIATE IF SOMEBODY CAN ASSIST ME WITH FORMULA FOR THIS. FRM: JEFF

4035

how to find the resistance and gap volatage of the diode??

2057

What current flows in the transformer primary when its secondary is open?

1257

Dear all i want to know SEWA Electrical Supervisor Licence test Previous Year Questions ? If any body know please send to me zohairaukllah@yahoo.com

1032

how to caculate cable size for diff types of loads? if anyone know the calculating procedure please tell me

1439

What is the typical enclosure type used for Indoor switchgear / Outdoor switchgear Units? - In Onshore / offshore Units?

998

what is 3rd Harmonics? how it is generated in alternator

9485

What are the function of different components of servo motor?

2046

What is zero of the system?

1103

How cmd is calculated in case of energy neters

1915

how we calculate the short circuit capacity of the busbar in LV & HT?

1104

calculate external resistance values to add to the rotor of a slip ring induction motor. STATOR- 415 V, 3 phase delta, 1100 A, 50 Hz, 1490 rpm, pf 0,86 ROTOR - 660 V, 590 A, 50 Hz. STATOR current at each steps STEP1-600A,STEP2- 800A,STEP3-1000A,STEP4-1100A.

3566

Could the power factor on electrical system can affect the registration of the kwhr meter or the CT/PT?

1962

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