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Electrical Engineering Interview Questions
Questions Answers Views Company eMail

what are the advantages disadvantages of connecting high voltage block( 1:1 transformers) transformers between the turbo generators and busbars.

Bajaj,

1187

what is vA rating and class of a ct.

L&T,

982

what is the ka rating of mccb. and how it is decided .

Napino,

3 4251

WHAT IS THE DIFFERENCE BETWEEN UNDERVOLTAGE COIL, CLOSING COIL AND SHUNT TRIP COIL OF AN ACB?

Alstom,

2 35188

why to use freewheeling diode ( diode in revers bias mode) across dc coil

 2 2624

What is A check, B check, C Check & D check for a diesel Generat

Jtekt Koyo Bearings,

1052

In Megger which types of test we can do ? and How it works? How to use?

Power Grid,

3 4273

what precautions to be taken while desigining a LT,HT panel. Eg-LT panel PCC panel with ACB installed. HT panel VCB panel with VCB installed. & what is main diffrence betwn IP54 & IP55 construction of panel.

Bhel,

1930

what is motor contrl center .

 3 2583

difference between temperature sensor and temperature switch

ABB,

3 6713

Can anybody please refer the best and simple book for about Protection relays and in detail of all its protection ?

 1050

Whats changes in Transformer Oil BDV in changes in temp or Climate?

TATA,

2 4057

why the electrical plug point pin(earth) size in max

Autoneum Nittoku, Bajaj,

1 3572

what is dedicated earthing

Apollo Power, Student,

2 6086

how do you select the ct/pt rating in substation

Apollo, Shreem Electric Ltd, Tata Motors,

1 5548

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Un-Answered Questions { Electrical Engineering }

why dc is used in control circuit for mv & hv switchgear instead of ac

976

How will you justify IR value and Charging voltage of any motor,transformer and Cables.......???? . . . . . . . . Plz tell me any body Baljeet Singh, engineer_89@refiff.com

1110

Can XLPE/SWB/PVC (P3) 7C X 2.5mm2 be replaced by Can XLPE/SWB/PVC (P2) 7C X 2.5mm2??? P3 vs P2

701

what is servo motor & how does it work.

1036

What is the Load Capacity of Panther conductor (0.2) and dog conductor (0.2) 

1842




In a carnot engine with an efficiency of 40%, the heat rejected to the sink at 27 C is 60 kJ, then the heat supplied in kJ to the engine by the sources is

178

Application Comparison between 22KV (UE)and 33KV (E) system. Are we allowed to use 33KV (E) cable in lieu of 22KV (UE) cable. What are the technical disadvantages.

1240

we have two motors 1250kW,6.6kV to be coupled on the same shaft ,so please provide assistance for their synchronisation.

1159

full form of flry b

2914

Why 11kv to be generated in generation station

764

quantizer means?

1066

ITI r/tv trade APPLY (J.T.O VACANCEY) ALSO INCLUD AITT ELECTRONIC,WRITEEN XAM DONE 23.03.10 BUT NO RESPONCE WHY ANATHER ID gopal_gh007@rediffmail.com

2405

Why an ac solenoid valve attract the plunger even though we interchanges the terminal? Will the poles changes?

161

What is the earth treantment procedure?

1075

Dear sir, In our plant have Station Transformer having capacity,i want to know, why LV side 40 - 40MVA is given? & how we can get 6.3 KV supply from tertiary(i.e. Open delta connection), Vector Group YNyn0 - yn0 +d MVA Rating 80MVA / 40 - 40MVA + 26.7MVA Voltage rating 420 (Tap range +6,to -10)81.25% /11.5KV - 11.5KV +6.3KV

1298

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