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Electrical Engineering Interview Questions
Questions Answers Views Company eMail

What is EMC filter in VVVF Drive ?

Bengal Energy,

1972

what is proper capacitor placement? How to evaluate capacitor size?

CPCL,

1482

why D.C excitation is given to sunchronous motor?

6 7354

What is mean by hormonics?

5 5739

What is mean by power factor?

Shreem Electric Ltd,

18 21753

WHY IN AC DRIVES,INPUT PHASE CURRENT SHOW UNBALANCE?

Adhunik,

1558

Can we inject more current in ct primary paralleling 2 loading transformers/Injection kit at a time?let ct ratio be (5000/1A)(per kit rating 2000A range),i need to inject 5000A,if this cant b done means wat is d optional?

1 3514

Can HT cable(11kv cable) be used for 415V, 700A requirement.

5 10739

What are the different parts of Alternator and how it works?

1 3517

What are the functions of different Parts of Alternator?

2 20045

How can we calculate strength of copper hich is supplying electric power to heater and in it hold the heater also and what r all types of forces which is acting on it...

ABB,

1276

How Much Capacity of Diesel Genset is suitable for 20 no.s of 1.5ton AC's & Why?(Load Calculation)

Lapis Technologies,

11 30878

how we can select MCB ratings according to Voltages, Curves.

2 12275

how to calculate the powerfactor in induction motor having name plate details? for example 1 h.p motor 1.86 A 415 V

6 18210

Why HT cable have only 3 core ?

Jindal, McDermott,

10 24567


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Un-Answered Questions { Electrical Engineering }

how we can calculate chiller required ampear?

1410


difine electrical ballast in HPSVL

1382


Tell me the reason of connecting domestic t/f primary in star or delta,and also secondary side.

1375


what is the internal working of star delta starter

1476


Mention the disadvantages of low power factor?

477






Explain forward resistance, static resistance and dynamic resistance of a pn junction diode.

470


why and where we use early make & late break contacts in protection?

7234


In the Variable Voltage Variable Frequency Drive, how the Voltage and Frequency varied ? Is it varied in the Inverter part of the Drive ? Please give us supporting document if any.

1362


Generator,motor and alternator Working principal Please explain easily

822


define reflection method?

1312


1.What is the range of stator resistance of 3-phase induction motor? 2.Two electrically operated vibro motors are foxed in parallel direction in vibrating feeders. what is the direction of both vibro motors?

1300


Define damping ratio.

544


How the capacitance og capacitor volatage transformer is decided?

1357


What is the physical significant of power factor?

1271


Can we check ELCB constantly from R1 to R8 phase in 1 no DB?

1060