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Electrical Engineering Interview Questions
Questions Answers Views Company eMail

what is the minimum winding resistance of 30hp compressor, to run or to switch on

958

What is different between MCB & MCC & isolator switch

Standard Chartered,

1 3125

What is evaporator & condencer & compressor

Standard Chartered,

1187

1.Z transform always lies around ? a) origin b) pole c) zero d) z=1. Multiples Mcqs which is bother me can’t find answers on internet. Some help required with little explanation . Note: this is not homework or related to any test. Thanks

CCP,

1502

Which motor has high Staring current A. Series DC motor, B.Induction motor c.Synchronous motor D.DC Shunt Motor

CCP,

4 2167

Megar test tell sufficient resistant

1 1769

Why r u using pf panel. what the uses

Standard Chartered,

1052

What is a difference between indoor transformer and outdoor transformer of same rating

Suzlon,

4130

my project load is 6 MW so please suggest the size of cable.. ALU 3c 400 aqmm cable can be sufficient.. is there any thumb rule for calculation of cable size please help me

1 926

Usage of flywheel diode in relays

Jindal, Voith,

932

I have 320 Kva DG Set his KWh running is 77 , how i can calculate into electrical unit .

Anuj Enterprises, Schneider,

2 1839

What is the meaning, function and application of OLTC?

Home,

3 3451

What is the meaning of CT 400-200/1-1 A ?

Home,

2 7295

What is the meaning of burden and class of accuracy of CT?

Home,

1 2113

if z transform lies in ROC then. a)system is stable b)inverse of system is stable c)both system and its inverse are stable.

CCP,

1 2957


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Un-Answered Questions { Electrical Engineering }

what is mean by Digital Logic Meter (DLM)

1430


I am designing new project sub station with 220 kV / 11 kV, 40 MVA capacity. This project have many recifier sets, which can generate 3rd harmonics. Now I have to select vector group of This transformer. To minimise 3rd harmonics, what care should I take in selection of Transformer Vecrtor group? If it is Y-Y with open Delta tertiary then what should be the rating & voltage of Tertiary Winding?

1033


what is rating boiler

1153


What is the basic of DTH.

1423


in battery charging room we find two fuses (one in positive other in negative cables ).why it is so?one fuse is ore than sufficient?

1407






What happens if we run alternator on under frequency? 

1235


where does 22kv line starts

2193


why do we use spark detector inside the slip ring brush compartment 0ona slip ring induction motor?

1164


What type of pipe material G.I or M.S is used for sprinkler system?

7553


Why we use duplex coil and hook switch in telephone system?

3932


where is core-type and shell-type construction suitable for transformers ?

1230


I want to merge a cable..in between two metering Cubicals which contains CT's and PT's and Energy meter..before taking merger..what are the common things required?

776


In the magnetic fluxes, what is the role of armature reaction?

267


what is the significance of tan&delta and how it performed in power transformer

976


why Lightening Arrester Probe sharp at Top of telecom tower.

727