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Electrical Engineering Interview Questions
Questions Answers Views Company eMail

What do you mean by isolators and circuit breakers?

Bhushan Power Steel,

6 16601

explain all the classes with example

1307

how to calculate micom relay earth falt time and current sertting

1515

why DOL starter is use in induction motor as it is not reduce the starting torque

Maruti Suzuki,

2 5435

Dsitrubution transformer minimum IR value

1 2899

advantage of using 110v than 230v

NTPC,

1 4962

3 ph motor connected in star delta starter. when we start the motor it run in star but when in is going in delta it trips the main incoming supply. why?

Bajaj Hindusthan,

3 8454

In 63kva LT Distribution Box Why the outgoing of 63A kit kat is connected to 200 A link disconnector? as the output of kit kat is only 63 A?

Godrej, Patel,

1 3231

the fuse is use for protection against overcurrent but at normal condition it carry the rated current then how single thin wire carry this current without melting

1 3025

why rating of transformer is in kva instead of kw?

3 4198

what is inverter

Bhel,

12 10399

Dear Sir how much cable size required from 0.75 kw to 50 kw for electric motor or pump

1 5139

We are getting supply at33kvand it stepdown to 11kv.So Our requirement is 11kv voltage.why we draw 33kv from the grid instead of 11kv?

Birla,

2 3700

Why transformer ratings in KVA not in KW?

ABB,

6 7803

We store the d.c supply...then why can't we store A.c supply???

4 7125


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Un-Answered Questions { Electrical Engineering }

v/f drive basic princeple

1749


wish of these transformer uses oil?

1011


what is a bus post insulator? explain its application in a substation.

11362


what is the difference between circular wdg & ractangular wdg?

1366


Transformer cores are laminated in order to A simplify its construction B minimize eddy current loss C reduce cost D reduce hysterisis loss

2634






The efficiency of a 100kva transformer is 0.98 at full load as well as half load , for this transformer what is the Copper loss at full load ?

1515


what does a string of resistors in a series will do?

536


I have motor 1500 HP and , 4160 V , 60 HZ , then i need the rating of transformer which can feed that motor ??

1237


Define sensitivity?

490


Explain the method to keep noises low in a control system?

466


what is tri state logic gate

1420


What is the efficiency during maximum power transfer?

465


How does an induction motor start?

553


Explain marx circuit.

628


How do you determine the size of transformer radiators in a transformer?

1282