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

Electrical Engineering Interview Questions

Questions Answers Views Company eMail

why the carbon brushes are used heat created rotating parts in eiectricity

1 3468

What is the technical difference between IS:1554 and Indian Railway IRS:S63/2007

Indian Railways,

2488

This is about the recent problem that we have faced in our project site. We have 6/7.5 MVA. 66/11kV three phase star - star power transformer. The neutral was solidly connected to the earthing mat. But because of high resistance of earthing mat (130 ohm on LV and 180 ohm on HV), one day LV side neutral earthing conductor melted and we had a huge damage. Can any one plz tell me what might happen when we connect power transformer neutral to the earthing mat which has high resistance (>100 ohm ) ?????

2 4455

why we are connecting the alternator to a steam turbine of higher RPM then the rated RPM of alternator? For example:( connecting 1500 rpm alternator to 7600 rpm steam turbine). we can directly connect the same rpm turbine to alternator know??? is there any special reason ???

2 5026

what is the meaning write of AC1,AC2,AC3 .....power contactor

ABB,

7 35668

why does in transformer the v/f ratio constant?

TATA,

2 10847

Why are we not getting shock while touching a metal which is being welded?

1 2910

What is the basic principle of welding process?

2146

WHAT IS THE MEANING CREEPAGE DISTANCE

1 4197

why the vfd motor take current high in vfd panel then mcc panel.current in vfd panel=160A in 93%.and mcc panel it shows 130A. (132kw motor)

1 3633

how to calculate the earthing conductor & no. of earth pits required

3 16926

how to calculate the lightning arrester conductor @ no of earth pits required

2120

what is relation between motor poles & motor current in 3 phase motor

1 3569

how to calculate the earth fault current

2503

whats relation b/w motor current & friqency

1 3709

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Un-Answered Questions { Electrical Engineering }

Draw the equivalent circuit of crystal oscillator?

1328

why in a swquence network representation, the negetive sequence generated voltage is taken as zero?

2007

In Electrical 'Single Line Diagram' cable nomenclature shows "2 X 1C X 630sq.mm to be provided for one incomer. The question is how many cable to be proved for one Incomer.

1751

How many types oil using in transformer ? How many letars using in transformer..?

2109

At what factor resistance r of a conductor depends?

1120

How CFL &T5 tube light glows?

2035

What is the use of mc( moving coil) in dc voltmeter and dc ammter and what is the use of ( moving iron)in ac voltmeter nd ac ammeter

2888

How colour picturetube works & how many year it will works.

2026

how the aircraft outer body and inner body is separated ?

1068

Could you measure voltage in series?

1273

what are the problems that generally occur in power flows??

3251

what may the reason for vector shift in a generator?

1869

what are pilot cells

2090

How much load can be taken for chiller from 1500 kva transformer

1275

how generator load test is conducted?what are the steps?

1594

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