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Electrical Engineering Interview Questions
Questions Answers Views Company eMail

what is the effect of PF on alternator sizing?

Siemens,

2 4348

features of hbc fuses

1132

how can i reduce sparking without stepdowning the voltage

1618

why transformer is rated in KVA ?

5 6675

Necessity of transformer earthing

1 5385

1. Synchronization is not required A. Thermal B.Hydel C.Wind D.Nuclear

APGenco, Birla Power,

2 2589

2. What are the parameters of EHT sub-station?

APGenco,

1260

2. What are the parameters of EHT sub-station?

APGenco, Blue Star, Enercon,

1 1529

what is meant by substation?

5 7413

how do we calculate length of starting time and repeated starting of a direct online starter?

1099

how to calculate the input current in singel phase and 3phase supply to 5kva ups

Gravity India,

1 5835

What is use of 3phase instead of single phase?

DCM, L&T,

12 10545

How to calculate the input cable rating for 10kva ups (3phase input and single phase output and also 3phase output, battery rating 65Ah)provide the formula also.thnx

Bhel,

1305

what is the difference between a frequecy converter and an electric inverter?

2 2824

what is the main different between distribution transformer and power transformer ?

Sail,

7 6336


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Un-Answered Questions { Electrical Engineering }

How Self works in DG set

864


What does quality factor depend on in resonance?

168


In both 600/1000 V cable and 450/750 V cable, we can supply 415 V. However for distribution, all utilities are using only 600/100 V instead of 450/750 V. What is the reason?

807


In how we connect watt meter for open & short circuit test of a single phase transformer.

4552


In Indian Household, generally we receive 220V AC single phase supply. But AC has 2 phases, +ve & -ve. So in +ve half cycle current is flowing...so what happens in the -ve half cycle?? Please illustrate.

1143






Why AC current leads voltage in capacitor and how?

1084


Dear all i am kumaravel. now in chennai. my work is control and relay panel auto cad designing.up to 11kv to 400kv then question is i am improving my knowledge. i want some books name and auther are available for this C&R panel related. plese any one help me

950


which protection function should measure RMS value of current&DFT value of current?

982


Power Factor Correction Panel (Manual & Automatic)

1105


full form of electrical?

1782


How shall i select the value of capacitor or inductor in a system?

970


How can we decide cable size from HT panel to Transformer? Please give you reply with some examples.

1291


STATE WORKING OF VACCUM CIRCUIT BRAKER?

1018


Dear sirs, pls check this 4-20ma to RS485 module datasheet,pls guve me some suggestions. http://www.szsunyuan.com/sy/pro_more.asp?Productid=539 Thanks. E-mail:yunianjiang99@gmail.com

1113


how does an centrifugal and screw type chiller will work. which chiller efficiency is high and why.

1375