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Electrical Engineering Interview Questions
Questions Answers Views Company eMail

why dc source used for HV breakers and Relays operation?

Cethar,

2 2390

why holding contact is not using in VCB and ACB breakers?

Cethar,

1 1867

Dear All, If we have 8No. 11kV cables running underground that are required to supply 20MW to a new development. What is the sustained current in Amps? Please advise.

1 1512

I want to know all basics of electrical engineering

RRB,

1275

what is a breaker fail relay

Eskom,

1416

Two bulbs of 500w and 200w rated at 250 v will have resistance ratio as ?

CGL, Dreamz Infra, Sunny Developers,

2 14059

how much rating of fuse and MCB should be used for a load consisting of 6KW and 18KW inductive load?

1 2109

What is deference between MCB & MCCB & ISOLATOR

Prakash Industries, Standard Chartered,

1279

What is the inside of ACB & VCB & SF6 breaker's pls tell me about this

Standard Chartered,

2 2754

when the Transmission and Distribution network where is the "feeder" lines are located? and why should be used in T&D network.....

1114

circuit breaker is ...............connected with circuit

Rancho,

2 2088

Inverter. converter. Ups.MCB.solar.alternators. motors.

Cisco,

1226

choose the non-switch device (A) transformer (B) diode (C) transistor (D) IC

3 2279

What is VSCF windelectrical system?

1140

What is advantages of VSCF wind electrical system?

1735


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Un-Answered Questions { Electrical Engineering }

i will applied in 1U-1W on 440 volt primary delta side. what is the result of magtic balance test

1231


circuit diagram of trip circuit supervision relay

1436


how i can calculate the size for fire cable

1329


I am using submission of two ct in one and half scheme for 67/67N protection. Both CTs star point is grounded separately near ct box.Will two point ground give wrong tripping to 67/67N during fault or no matter.

1487


hello friends this is krunal here.. i have applied for he officer train in hpcl electrical stream.. any one who have applied before for electrical stream please help me out.. post ur reply to my mail id: krunal_airforce@yahoo.com.. any tips, old questions for paper or any help will do.. plz help me.. your faithfully, Krunal Darji

1255






What are the causes of unbalanced current on 34.5kv feeder Ia=0.05,Ib= 0.25, Ic=0.15 and In=0.27 prior to tripping current are balance?

1173


What are protections for dty type transformers

1229


I AM A ELECTRICAL PANEL BOARD DESIGN ENGINEER.IF I GO ANY INTERVIEW ,TECHNICALLY WHAT ARE QUESTIONS I WILL FACE FROM INTERVIEWER?

12054


what is the effect of power factor of machines in starting current

1355


what is the IS foe lightning arrester?

1490


Where can i get practical knowledge of solar system?

798


Define conversion efficiency of a power amplifier. What is its value for class c power amplifier?

553


How to calculate energy stored in an inductance?

469


I HAVE A 50A MCCB AS PER DESIGN LINE WIRE CONNECT UPWORD SIDE AND LOAD IS CONNECTED TO DOWNWARD SIDE TO THE MCCB.IF NOW ANY ONE CHANGE SUPPLY & LOAD(WISEVERSA) WHAT HAPPENS ? DOES MCCB OPERATION OR WORKING FUNCTION NORMAL IF YES THAN WHY THERE ARE MARKED LINE & LOAD ON MCCB.

1719


wheather the size of windings in motor and generator are the same

1337