Electrical Engineering Interview Questions
Questions Answers Views Company eMail

why the desirable efficiency for a motor is 60%, but in case of transformer, it is above 90%?

1 3417

how to calculate Amp, 2 different Amp of batteries? Example: No. of Batteries = 2 Battery voltage = 12V 1st Battery rating = 17AH 2nd battery rating = 30AH between parallel connection then output volt 12v Amp?

Bhel, LG Soft,

2 4750

Can we use droop CT in neutral in place of W phase of alternator ?

2 4731

what is the earth resistance

Micron Electricals,

4 6569

For 6600/433 distribution transformer we apply secondary side 433 volts how much voltage in primary side.

2 4359

how can calculation ate Amps for cabel. Ex-for 1sqmm wire hou many amps we can draw

Videocon,

2118

can u tell the difference between star-star transformer and delta to delta transformer.

Videocon,

3 4996

what is rating boiler

1674

expansion of rccb

Videocon,

2 4481

What is the intent of short circuit studies?

3 4630

how and why are capacitors are used to improve powerfactor?

4 5795

why do we use star-delta starter. what is its need?

6 48002

whenewher three phase supply is given to induction motors revolving/rotating field is created & rotor rotates.When the three phase supply is given to three phase transformer then revolving,/rotating field is created or not? if not why?

1 2923

how could we findout the lightning arrester failed or not in live circuit? Is there any instrument to measure the high voltage at the time of sky lighting?

1 3449



Post New Electrical Engineering Questions

Un-Answered Questions { Electrical Engineering }

What is electrical grounding?

761


What is the role of feedback in a closed loop control system?

767


HOW WE CHOOSE EARTH'S POTENTIAL AS ZERO V?

1735


Explain about technical and non technical losses in distribution system?

734


What are electric motors?

786






how to calculate regulation constants for over head lines? and what are the regulation constant for raccoon conductor at different voltage level and different P.F?

1624


234 MVA Generator 3 phase Short circuit current Values required? Gen set Rating-234 MVA, Gen Voltage-18kv, PF;0.8, Xdv:23.5 %, Transformer Rating-18/380KV, 680MVA,Yndd1 two winding, Step up TR, ZT:35.50 %,X/R 4.33 Gen CB Position, CB open ,Disconnected open, Generator Running Voltage 18 Kv, Bi mistakes generator side earth switch Closed during that time short circuit current level in 3 Phase required, and how to test on site 234MVA Generator Short circuit current,

1895


how to calculation increase power factor for single phase

1938


which stabilizer is better ? AVR, Servo Stabilizer, Static stabilizer etc & why explain it

2534


how to measure the transformer resistance values(dyn11)?and howmuch the minimum value?

1805


WHATIS TIME CONSTANT? WHATIS ITS SIGNIFICANCE? ILLUSTRATE THROUGH EXAMLES.

1811


is that a problem if i connect a single phase load to a secondry delta connected transformer but i get a neutral from other transformer i the system?

1506


HOW WE KNOW IN PHYSICALLY THE CONTACT SURFACE OF A VACUUM INTERRUPTER IS GOOD OR GOING TO DAMAGE IN A VCB AFTER ABOVE 500 TIMES OPERATED.

1776


hi I have done 3 yrs diploma in electrical engg after 10+2. I have 16 years of work experience into design proposals sales and engg application development in LV/MV swithcgear and sub station automation field. I want to apply for immigration to new zealand but I am not sure whether I qualify or not since I dont have a degree. Can anyone advice? Thanks Riz

1974


Control cables in S's will carry 1000v which is AC R DC? Pls answer me 

1744