Material commonly used in making transformer core is
A cast iron B mild steel
C high silicom steel D high carbon steel
when we decide to use soft starter drive or vfd drive in mcc to operate apump?
What is the function of electron gun used in crt?
What is dc current source? Differentiate between ideal and non ideal current sources?
why all the feeders are designed in a particular manner ... is there any reason for that???
A powerplant has 8 gensets operating in grid parallel mode. In one genset sometimes there is pf variation and kvar variation. The plant operates in pf mode. When this variation is onbserved the load is stable, voltage is also stable, freq and genset speed is also stable. How will you check the functioning of pf card. What shall be the ideal output vdc of the pfc, from there it is input to AVR?
WHATIS TIME CONSTANT? WHATIS ITS SIGNIFICANCE? ILLUSTRATE THROUGH EXAMLES.
Why the frequency of a system is changed if the load changes?
what is earth resistance? how to measured? and give values at power station and mcc area?
on what priciple transformer works on?
How the CT and PT ratings are calculated
what is the different between counterpoise earthing and pipe earthing?
The neutarl to earth voltage in system is 7volts on Electricity power but it lowers to 1.3volts when load transfered to DG power.what may be the reason.
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