Electrical Engineering Interview Questions
Questions Answers Views Company eMail

what is mean by harmonics?Type of harmonics?

6 6299

hi , i have 150 kw loud and we need 50 m cabil,i want to know wich size cabil we use. thanks

1576

Why let through energy not considered for ACB breaker while cable sizing?

1777

Why electrons flow only one direction in semiconductors. why can not flow both directions

1 2798

how can i apilly for electrical c licencese.sir,i completed B.Tech in electrical & electronics engineering in 201onot working any company

Subros,

1402

why ac ratings are in tons?

2 3810

if a bird sits on the service wire it didn't get shock then why the human get shock when he touches it(assume that human is not on the ground and any object i.e. in space)?

5 5293

why power factor is only cosine angle not sine angle?

2 4460

when measure the core loss of three phase distribution transformer or three phase reactor loss, one phase shown negative watt loss. why??

1456

what is the difference b/w bus reactor and line reactor?

1 15706

how to decide the capacity of accl

1824

What is Scheme Test of High Voltage Switchgear. Which tests it includes.

Siemens,

1824

How calculate cable size & voltage drop for the following requirement connected load 150 KW distance cable length 1000 M voltage 3 phase 415 v.

1 3100

how to put cable sizing and cable glands size for respective cable & Cable Lug size in a DB sectors???

1566

Difference between copper earthing & aluminium earthing?

2 4566


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Un-Answered Questions { Electrical Engineering }

What is the formula to calculate the rating of power cable for three phase current.

1599


What is the difference between type1 and type2 relay protection co-ordination for motor feeders

1664


why we take movement of rotor always in counter-clockwise direction in 3-phase induction motors?

1432


I just purchased a 4 position cam switch to be used to operate a 3-speed blower motor. The motor is a 10 amp motor and has 3 wires that are used to control speed. The cam switch was rated at 660V 20 amps but when I received it, I noticed that it has AC-15 operational current rating (Ie) of 4/5 amps. If I am reading the label correctly. the 4/5 amps is related to 440v/220V (Ue). Other ratings are AC-3: 5.5A, AC2: 7.5A and AC-4: 1.5A. My questions are 1) Is it safe to use this switch with the motor I have 2) what is the difference between the 20 amp Ith ratting and the Ie operational ratings?

1155


What is the alternate solution for testing of polarity by using polarity tester while its milli ammeter does not works?

1447






Define what is the function of anti-pumping in circuit breaker?

608


How to know th details about an electrical Drawing ? Please mention the easy method.

1929


where can i get vijaya electricals limited in hyderabad interview auestions can u give me the website address plz

1545


how to calculate slip ring induction motor stator and rotor currents??

1624


Why use the vcb at high transmission system ? Why can’t use acb?

709


I have a CT meter with ratio 60/5. The meter reading of previous month was 3290.49 and that of current month was 3797.26. How many chargeable units as per normal meter should be my reading.

893


how to calculate kvar in Akiva

1402


What is inrush current? how can calculateit? what is the affect of it?

1455


HI....HOW CAN BE MESARED THE VALVE OF NEUTRAL GROUND RESISTOR WHIC IS LOCATED AT SWICHGEAR ON GENERATOR SIDE....

1519


what is dry and wet frequency withstand voltage? why & where it is used??

1670